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Ticket #22423: functions.php

File functions.php, 115.4 KB (added by MatthewRuddy, 13 years ago)
Said modification to wp-includes/functions.php file

Line
1	<?php
2	/**
3	* Main WordPress API
4	*
5	* @package WordPress
6	*/
7
8	require( ABSPATH . WPINC . '/option.php' );
9
10	/**
11	* Converts given date string into a different format.
12	*
13	* $format should be either a PHP date format string, e.g. 'U' for a Unix
14	* timestamp, or 'G' for a Unix timestamp assuming that $date is GMT.
15	*
16	* If $translate is true then the given date and format string will
17	* be passed to date_i18n() for translation.
18	*
19	* @since 0.71
20	*
21	* @param string $format Format of the date to return.
22	* @param string $date Date string to convert.
23	* @param bool $translate Whether the return date should be translated. Default is true.
24	* @return string\|int Formatted date string, or Unix timestamp.
25	*/
26	function mysql2date( $format, $date, $translate = true ) {
27	if ( empty( $date ) )
28	return false;
29
30	if ( 'G' == $format )
31	return strtotime( $date . ' +0000' );
32
33	$i = strtotime( $date );
34
35	if ( 'U' == $format )
36	return $i;
37
38	if ( $translate )
39	return date_i18n( $format, $i );
40	else
41	return date( $format, $i );
42	}
43
44	/**
45	* Retrieve the current time based on specified type.
46	*
47	* The 'mysql' type will return the time in the format for MySQL DATETIME field.
48	* The 'timestamp' type will return the current timestamp.
49	*
50	* If $gmt is set to either '1' or 'true', then both types will use GMT time.
51	* if $gmt is false, the output is adjusted with the GMT offset in the WordPress option.
52	*
53	* @since 1.0.0
54	*
55	* @param string $type Either 'mysql' or 'timestamp'.
56	* @param int\|bool $gmt Optional. Whether to use GMT timezone. Default is false.
57	* @return int\|string String if $type is 'gmt', int if $type is 'timestamp'.
58	*/
59	function current_time( $type, $gmt = 0 ) {
60	switch ( $type ) {
61	case 'mysql':
62	return ( $gmt ) ? gmdate( 'Y-m-d H:i:s' ) : gmdate( 'Y-m-d H:i:s', ( time() + ( get_option( 'gmt_offset' ) * HOUR_IN_SECONDS ) ) );
63	break;
64	case 'timestamp':
65	return ( $gmt ) ? time() : time() + ( get_option( 'gmt_offset' ) * HOUR_IN_SECONDS );
66	break;
67	}
68	}
69
70	/**
71	* Retrieve the date in localized format, based on timestamp.
72	*
73	* If the locale specifies the locale month and weekday, then the locale will
74	* take over the format for the date. If it isn't, then the date format string
75	* will be used instead.
76	*
77	* @since 0.71
78	*
79	* @param string $dateformatstring Format to display the date.
80	* @param int $unixtimestamp Optional. Unix timestamp.
81	* @param bool $gmt Optional, default is false. Whether to convert to GMT for time.
82	* @return string The date, translated if locale specifies it.
83	*/
84	function date_i18n( $dateformatstring, $unixtimestamp = false, $gmt = false ) {
85	global $wp_locale;
86	$i = $unixtimestamp;
87
88	if ( false === $i ) {
89	if ( ! $gmt )
90	$i = current_time( 'timestamp' );
91	else
92	$i = time();
93	// we should not let date() interfere with our
94	// specially computed timestamp
95	$gmt = true;
96	}
97
98	// store original value for language with untypical grammars
99	// see http://core.trac.wordpress.org/ticket/9396
100	$req_format = $dateformatstring;
101
102	$datefunc = $gmt? 'gmdate' : 'date';
103
104	if ( ( !empty( $wp_locale->month ) ) && ( !empty( $wp_locale->weekday ) ) ) {
105	$datemonth = $wp_locale->get_month( $datefunc( 'm', $i ) );
106	$datemonth_abbrev = $wp_locale->get_month_abbrev( $datemonth );
107	$dateweekday = $wp_locale->get_weekday( $datefunc( 'w', $i ) );
108	$dateweekday_abbrev = $wp_locale->get_weekday_abbrev( $dateweekday );
109	$datemeridiem = $wp_locale->get_meridiem( $datefunc( 'a', $i ) );
110	$datemeridiem_capital = $wp_locale->get_meridiem( $datefunc( 'A', $i ) );
111	$dateformatstring = ' '.$dateformatstring;
112	$dateformatstring = preg_replace( "/([^\\\])D/", "\\1" . backslashit( $dateweekday_abbrev ), $dateformatstring );
113	$dateformatstring = preg_replace( "/([^\\\])F/", "\\1" . backslashit( $datemonth ), $dateformatstring );
114	$dateformatstring = preg_replace( "/([^\\\])l/", "\\1" . backslashit( $dateweekday ), $dateformatstring );
115	$dateformatstring = preg_replace( "/([^\\\])M/", "\\1" . backslashit( $datemonth_abbrev ), $dateformatstring );
116	$dateformatstring = preg_replace( "/([^\\\])a/", "\\1" . backslashit( $datemeridiem ), $dateformatstring );
117	$dateformatstring = preg_replace( "/([^\\\])A/", "\\1" . backslashit( $datemeridiem_capital ), $dateformatstring );
118
119	$dateformatstring = substr( $dateformatstring, 1, strlen( $dateformatstring ) -1 );
120	}
121	$timezone_formats = array( 'P', 'I', 'O', 'T', 'Z', 'e' );
122	$timezone_formats_re = implode( '\|', $timezone_formats );
123	if ( preg_match( "/$timezone_formats_re/", $dateformatstring ) ) {
124	$timezone_string = get_option( 'timezone_string' );
125	if ( $timezone_string ) {
126	$timezone_object = timezone_open( $timezone_string );
127	$date_object = date_create( null, $timezone_object );
128	foreach( $timezone_formats as $timezone_format ) {
129	if ( false !== strpos( $dateformatstring, $timezone_format ) ) {
130	$formatted = date_format( $date_object, $timezone_format );
131	$dateformatstring = ' '.$dateformatstring;
132	$dateformatstring = preg_replace( "/([^\\\])$timezone_format/", "\\1" . backslashit( $formatted ), $dateformatstring );
133	$dateformatstring = substr( $dateformatstring, 1, strlen( $dateformatstring ) -1 );
134	}
135	}
136	}
137	}
138	$j = @$datefunc( $dateformatstring, $i );
139	// allow plugins to redo this entirely for languages with untypical grammars
140	$j = apply_filters('date_i18n', $j, $req_format, $i, $gmt);
141	return $j;
142	}
143
144	/**
145	* Convert integer number to format based on the locale.
146	*
147	* @since 2.3.0
148	*
149	* @param int $number The number to convert based on locale.
150	* @param int $decimals Precision of the number of decimal places.
151	* @return string Converted number in string format.
152	*/
153	function number_format_i18n( $number, $decimals = 0 ) {
154	global $wp_locale;
155	$formatted = number_format( $number, absint( $decimals ), $wp_locale->number_format['decimal_point'], $wp_locale->number_format['thousands_sep'] );
156	return apply_filters( 'number_format_i18n', $formatted );
157	}
158
159	/**
160	* Convert number of bytes largest unit bytes will fit into.
161	*
162	* It is easier to read 1kB than 1024 bytes and 1MB than 1048576 bytes. Converts
163	* number of bytes to human readable number by taking the number of that unit
164	* that the bytes will go into it. Supports TB value.
165	*
166	* Please note that integers in PHP are limited to 32 bits, unless they are on
167	* 64 bit architecture, then they have 64 bit size. If you need to place the
168	* larger size then what PHP integer type will hold, then use a string. It will
169	* be converted to a double, which should always have 64 bit length.
170	*
171	* Technically the correct unit names for powers of 1024 are KiB, MiB etc.
172	* @link http://en.wikipedia.org/wiki/Byte
173	*
174	* @since 2.3.0
175	*
176	* @param int\|string $bytes Number of bytes. Note max integer size for integers.
177	* @param int $decimals Precision of number of decimal places. Deprecated.
178	* @return bool\|string False on failure. Number string on success.
179	*/
180	function size_format( $bytes, $decimals = 0 ) {
181	$quant = array(
182	// ========================= Origin ====
183	'TB' => 1099511627776, // pow( 1024, 4)
184	'GB' => 1073741824, // pow( 1024, 3)
185	'MB' => 1048576, // pow( 1024, 2)
186	'kB' => 1024, // pow( 1024, 1)
187	'B ' => 1, // pow( 1024, 0)
188	);
189	foreach ( $quant as $unit => $mag )
190	if ( doubleval($bytes) >= $mag )
191	return number_format_i18n( $bytes / $mag, $decimals ) . ' ' . $unit;
192
193	return false;
194	}
195
196	/**
197	* Get the week start and end from the datetime or date string from mysql.
198	*
199	* @since 0.71
200	*
201	* @param string $mysqlstring Date or datetime field type from mysql.
202	* @param int $start_of_week Optional. Start of the week as an integer.
203	* @return array Keys are 'start' and 'end'.
204	*/
205	function get_weekstartend( $mysqlstring, $start_of_week = '' ) {
206	$my = substr( $mysqlstring, 0, 4 ); // Mysql string Year
207	$mm = substr( $mysqlstring, 8, 2 ); // Mysql string Month
208	$md = substr( $mysqlstring, 5, 2 ); // Mysql string day
209	$day = mktime( 0, 0, 0, $md, $mm, $my ); // The timestamp for mysqlstring day.
210	$weekday = date( 'w', $day ); // The day of the week from the timestamp
211	if ( !is_numeric($start_of_week) )
212	$start_of_week = get_option( 'start_of_week' );
213
214	if ( $weekday < $start_of_week )
215	$weekday += 7;
216
217	$start = $day - DAY_IN_SECONDS * ( $weekday - $start_of_week ); // The most recent week start day on or before $day
218	$end = $start + 7 * DAY_IN_SECONDS - 1; // $start + 7 days - 1 second
219	return compact( 'start', 'end' );
220	}
221
222	/**
223	* Unserialize value only if it was serialized.
224	*
225	* @since 2.0.0
226	*
227	* @param string $original Maybe unserialized original, if is needed.
228	* @return mixed Unserialized data can be any type.
229	*/
230	function maybe_unserialize( $original ) {
231	if ( is_serialized( $original ) ) // don't attempt to unserialize data that wasn't serialized going in
232	return @unserialize( $original );
233	return $original;
234	}
235
236	/**
237	* Check value to find if it was serialized.
238	*
239	* If $data is not an string, then returned value will always be false.
240	* Serialized data is always a string.
241	*
242	* @since 2.0.5
243	*
244	* @param mixed $data Value to check to see if was serialized.
245	* @return bool False if not serialized and true if it was.
246	*/
247	function is_serialized( $data ) {
248	// if it isn't a string, it isn't serialized
249	if ( ! is_string( $data ) )
250	return false;
251	$data = trim( $data );
252	if ( 'N;' == $data )
253	return true;
254	$length = strlen( $data );
255	if ( $length < 4 )
256	return false;
257	if ( ':' !== $data[1] )
258	return false;
259	$lastc = $data[$length-1];
260	if ( ';' !== $lastc && '}' !== $lastc )
261	return false;
262	$token = $data[0];
263	switch ( $token ) {
264	case 's' :
265	if ( '"' !== $data[$length-2] )
266	return false;
267	case 'a' :
268	case 'O' :
269	return (bool) preg_match( "/^{$token}:[0-9]+:/s", $data );
270	case 'b' :
271	case 'i' :
272	case 'd' :
273	return (bool) preg_match( "/^{$token}:[0-9.E-]+;\$/", $data );
274	}
275	return false;
276	}
277
278	/**
279	* Check whether serialized data is of string type.
280	*
281	* @since 2.0.5
282	*
283	* @param mixed $data Serialized data
284	* @return bool False if not a serialized string, true if it is.
285	*/
286	function is_serialized_string( $data ) {
287	// if it isn't a string, it isn't a serialized string
288	if ( !is_string( $data ) )
289	return false;
290	$data = trim( $data );
291	$length = strlen( $data );
292	if ( $length < 4 )
293	return false;
294	elseif ( ':' !== $data[1] )
295	return false;
296	elseif ( ';' !== $data[$length-1] )
297	return false;
298	elseif ( $data[0] !== 's' )
299	return false;
300	elseif ( '"' !== $data[$length-2] )
301	return false;
302	else
303	return true;
304	}
305
306	/**
307	* Serialize data, if needed.
308	*
309	* @since 2.0.5
310	*
311	* @param mixed $data Data that might be serialized.
312	* @return mixed A scalar data
313	*/
314	function maybe_serialize( $data ) {
315	if ( is_array( $data ) \|\| is_object( $data ) )
316	return serialize( $data );
317
318	// Double serialization is required for backward compatibility.
319	// See http://core.trac.wordpress.org/ticket/12930
320	if ( is_serialized( $data ) )
321	return serialize( $data );
322
323	return $data;
324	}
325
326	/**
327	* Retrieve post title from XMLRPC XML.
328	*
329	* If the title element is not part of the XML, then the default post title from
330	* the $post_default_title will be used instead.
331	*
332	* @package WordPress
333	* @subpackage XMLRPC
334	* @since 0.71
335	*
336	* @global string $post_default_title Default XMLRPC post title.
337	*
338	* @param string $content XMLRPC XML Request content
339	* @return string Post title
340	*/
341	function xmlrpc_getposttitle( $content ) {
342	global $post_default_title;
343	if ( preg_match( '/<title>(.+?)<\/title>/is', $content, $matchtitle ) ) {
344	$post_title = $matchtitle[1];
345	} else {
346	$post_title = $post_default_title;
347	}
348	return $post_title;
349	}
350
351	/**
352	* Retrieve the post category or categories from XMLRPC XML.
353	*
354	* If the category element is not found, then the default post category will be
355	* used. The return type then would be what $post_default_category. If the
356	* category is found, then it will always be an array.
357	*
358	* @package WordPress
359	* @subpackage XMLRPC
360	* @since 0.71
361	*
362	* @global string $post_default_category Default XMLRPC post category.
363	*
364	* @param string $content XMLRPC XML Request content
365	* @return string\|array List of categories or category name.
366	*/
367	function xmlrpc_getpostcategory( $content ) {
368	global $post_default_category;
369	if ( preg_match( '/<category>(.+?)<\/category>/is', $content, $matchcat ) ) {
370	$post_category = trim( $matchcat[1], ',' );
371	$post_category = explode( ',', $post_category );
372	} else {
373	$post_category = $post_default_category;
374	}
375	return $post_category;
376	}
377
378	/**
379	* XMLRPC XML content without title and category elements.
380	*
381	* @package WordPress
382	* @subpackage XMLRPC
383	* @since 0.71
384	*
385	* @param string $content XMLRPC XML Request content
386	* @return string XMLRPC XML Request content without title and category elements.
387	*/
388	function xmlrpc_removepostdata( $content ) {
389	$content = preg_replace( '/<title>(.+?)<\/title>/si', '', $content );
390	$content = preg_replace( '/<category>(.+?)<\/category>/si', '', $content );
391	$content = trim( $content );
392	return $content;
393	}
394
395	/**
396	* Check content for video and audio links to add as enclosures.
397	*
398	* Will not add enclosures that have already been added and will
399	* remove enclosures that are no longer in the post. This is called as
400	* pingbacks and trackbacks.
401	*
402	* @package WordPress
403	* @since 1.5.0
404	*
405	* @uses $wpdb
406	*
407	* @param string $content Post Content
408	* @param int $post_ID Post ID
409	*/
410	function do_enclose( $content, $post_ID ) {
411	global $wpdb;
412
413	//TODO: Tidy this ghetto code up and make the debug code optional
414	include_once( ABSPATH . WPINC . '/class-IXR.php' );
415
416	$post_links = array();
417
418	$pung = get_enclosed( $post_ID );
419
420	$ltrs = '\w';
421	$gunk = '/#~:.?+=&%@!\-';
422	$punc = '.:?\-';
423	$any = $ltrs . $gunk . $punc;
424
425	preg_match_all( "{\b http : [$any] +? (?= [$punc] * [^$any] \| $)}x", $content, $post_links_temp );
426
427	foreach ( $pung as $link_test ) {
428	if ( !in_array( $link_test, $post_links_temp[0] ) ) { // link no longer in post
429	$mids = $wpdb->get_col( $wpdb->prepare("SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = 'enclosure' AND meta_value LIKE (%s)", $post_ID, like_escape( $link_test ) . '%') );
430	foreach ( $mids as $mid )
431	delete_metadata_by_mid( 'post', $mid );
432	}
433	}
434
435	foreach ( (array) $post_links_temp[0] as $link_test ) {
436	if ( !in_array( $link_test, $pung ) ) { // If we haven't pung it already
437	$test = @parse_url( $link_test );
438	if ( false === $test )
439	continue;
440	if ( isset( $test['query'] ) )
441	$post_links[] = $link_test;
442	elseif ( isset($test['path']) && ( $test['path'] != '/' ) && ($test['path'] != '' ) )
443	$post_links[] = $link_test;
444	}
445	}
446
447	foreach ( (array) $post_links as $url ) {
448	if ( $url != '' && !$wpdb->get_var( $wpdb->prepare( "SELECT post_id FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = 'enclosure' AND meta_value LIKE (%s)", $post_ID, like_escape( $url ) . '%' ) ) ) {
449
450	if ( $headers = wp_get_http_headers( $url) ) {
451	$len = isset( $headers['content-length'] ) ? (int) $headers['content-length'] : 0;
452	$type = isset( $headers['content-type'] ) ? $headers['content-type'] : '';
453	$allowed_types = array( 'video', 'audio' );
454
455	// Check to see if we can figure out the mime type from
456	// the extension
457	$url_parts = @parse_url( $url );
458	if ( false !== $url_parts ) {
459	$extension = pathinfo( $url_parts['path'], PATHINFO_EXTENSION );
460	if ( !empty( $extension ) ) {
461	foreach ( wp_get_mime_types() as $exts => $mime ) {
462	if ( preg_match( '!^(' . $exts . ')$!i', $extension ) ) {
463	$type = $mime;
464	break;
465	}
466	}
467	}
468	}
469
470	if ( in_array( substr( $type, 0, strpos( $type, "/" ) ), $allowed_types ) ) {
471	add_post_meta( $post_ID, 'enclosure', "$url\n$len\n$mime\n" );
472	}
473	}
474	}
475	}
476	}
477
478	/**
479	* Perform a HTTP HEAD or GET request.
480	*
481	* If $file_path is a writable filename, this will do a GET request and write
482	* the file to that path.
483	*
484	* @since 2.5.0
485	*
486	* @param string $url URL to fetch.
487	* @param string\|bool $file_path Optional. File path to write request to.
488	* @param int $red (private) The number of Redirects followed, Upon 5 being hit, returns false.
489	* @return bool\|string False on failure and string of headers if HEAD request.
490	*/
491	function wp_get_http( $url, $file_path = false, $red = 1 ) {
492	@set_time_limit( 60 );
493
494	if ( $red > 5 )
495	return false;
496
497	$options = array();
498	$options['redirection'] = 5;
499
500	if ( false == $file_path )
501	$options['method'] = 'HEAD';
502	else
503	$options['method'] = 'GET';
504
505	$response = wp_remote_request($url, $options);
506
507	if ( is_wp_error( $response ) )
508	return false;
509
510	$headers = wp_remote_retrieve_headers( $response );
511	$headers['response'] = wp_remote_retrieve_response_code( $response );
512
513	// WP_HTTP no longer follows redirects for HEAD requests.
514	if ( 'HEAD' == $options['method'] && in_array($headers['response'], array(301, 302)) && isset( $headers['location'] ) ) {
515	return wp_get_http( $headers['location'], $file_path, ++$red );
516	}
517
518	if ( false == $file_path )
519	return $headers;
520
521	// GET request - write it to the supplied filename
522	$out_fp = fopen($file_path, 'w');
523	if ( !$out_fp )
524	return $headers;
525
526	fwrite( $out_fp, wp_remote_retrieve_body( $response ) );
527	fclose($out_fp);
528	clearstatcache();
529
530	return $headers;
531	}
532
533	/**
534	* Retrieve HTTP Headers from URL.
535	*
536	* @since 1.5.1
537	*
538	* @param string $url
539	* @param bool $deprecated Not Used.
540	* @return bool\|string False on failure, headers on success.
541	*/
542	function wp_get_http_headers( $url, $deprecated = false ) {
543	if ( !empty( $deprecated ) )
544	_deprecated_argument( __FUNCTION__, '2.7' );
545
546	$response = wp_remote_head( $url );
547
548	if ( is_wp_error( $response ) )
549	return false;
550
551	return wp_remote_retrieve_headers( $response );
552	}
553
554	/**
555	* Whether today is a new day.
556	*
557	* @since 0.71
558	* @uses $day Today
559	* @uses $previousday Previous day
560	*
561	* @return int 1 when new day, 0 if not a new day.
562	*/
563	function is_new_day() {
564	global $currentday, $previousday;
565	if ( $currentday != $previousday )
566	return 1;
567	else
568	return 0;
569	}
570
571	/**
572	* Build URL query based on an associative and, or indexed array.
573	*
574	* This is a convenient function for easily building url queries. It sets the
575	* separator to '&' and uses _http_build_query() function.
576	*
577	* @see _http_build_query() Used to build the query
578	* @link http://us2.php.net/manual/en/function.http-build-query.php more on what
579	* http_build_query() does.
580	*
581	* @since 2.3.0
582	*
583	* @param array $data URL-encode key/value pairs.
584	* @return string URL encoded string
585	*/
586	function build_query( $data ) {
587	return _http_build_query( $data, null, '&', '', false );
588	}
589
590	// from php.net (modified by Mark Jaquith to behave like the native PHP5 function)
591	function _http_build_query($data, $prefix=null, $sep=null, $key='', $urlencode=true) {
592	$ret = array();
593
594	foreach ( (array) $data as $k => $v ) {
595	if ( $urlencode)
596	$k = urlencode($k);
597	if ( is_int($k) && $prefix != null )
598	$k = $prefix.$k;
599	if ( !empty($key) )
600	$k = $key . '%5B' . $k . '%5D';
601	if ( $v === null )
602	continue;
603	elseif ( $v === FALSE )
604	$v = '0';
605
606	if ( is_array($v) \|\| is_object($v) )
607	array_push($ret,_http_build_query($v, '', $sep, $k, $urlencode));
608	elseif ( $urlencode )
609	array_push($ret, $k.'='.urlencode($v));
610	else
611	array_push($ret, $k.'='.$v);
612	}
613
614	if ( null === $sep )
615	$sep = ini_get('arg_separator.output');
616
617	return implode($sep, $ret);
618	}
619
620	/**
621	* Retrieve a modified URL query string.
622	*
623	* You can rebuild the URL and append a new query variable to the URL query by
624	* using this function. You can also retrieve the full URL with query data.
625	*
626	* Adding a single key & value or an associative array. Setting a key value to
627	* an empty string removes the key. Omitting oldquery_or_uri uses the $_SERVER
628	* value. Additional values provided are expected to be encoded appropriately
629	* with urlencode() or rawurlencode().
630	*
631	* @since 1.5.0
632	*
633	* @param mixed $param1 Either newkey or an associative_array
634	* @param mixed $param2 Either newvalue or oldquery or uri
635	* @param mixed $param3 Optional. Old query or uri
636	* @return string New URL query string.
637	*/
638	function add_query_arg() {
639	$ret = '';
640	$args = func_get_args();
641	if ( is_array( $args[0] ) ) {
642	if ( count( $args ) < 2 \|\| false === $args[1] )
643	$uri = $_SERVER['REQUEST_URI'];
644	else
645	$uri = $args[1];
646	} else {
647	if ( count( $args ) < 3 \|\| false === $args[2] )
648	$uri = $_SERVER['REQUEST_URI'];
649	else
650	$uri = $args[2];
651	}
652
653	if ( $frag = strstr( $uri, '#' ) )
654	$uri = substr( $uri, 0, -strlen( $frag ) );
655	else
656	$frag = '';
657
658	if ( 0 === stripos( 'http://', $uri ) ) {
659	$protocol = 'http://';
660	$uri = substr( $uri, 7 );
661	} elseif ( 0 === stripos( 'https://', $uri ) ) {
662	$protocol = 'https://';
663	$uri = substr( $uri, 8 );
664	} else {
665	$protocol = '';
666	}
667
668	if ( strpos( $uri, '?' ) !== false ) {
669	$parts = explode( '?', $uri, 2 );
670	if ( 1 == count( $parts ) ) {
671	$base = '?';
672	$query = $parts[0];
673	} else {
674	$base = $parts[0] . '?';
675	$query = $parts[1];
676	}
677	} elseif ( $protocol \|\| strpos( $uri, '=' ) === false ) {
678	$base = $uri . '?';
679	$query = '';
680	} else {
681	$base = '';
682	$query = $uri;
683	}
684
685	wp_parse_str( $query, $qs );
686	$qs = urlencode_deep( $qs ); // this re-URL-encodes things that were already in the query string
687	if ( is_array( $args[0] ) ) {
688	$kayvees = $args[0];
689	$qs = array_merge( $qs, $kayvees );
690	} else {
691	$qs[ $args[0] ] = $args[1];
692	}
693
694	foreach ( $qs as $k => $v ) {
695	if ( $v === false )
696	unset( $qs[$k] );
697	}
698
699	$ret = build_query( $qs );
700	$ret = trim( $ret, '?' );
701	$ret = preg_replace( '#=(&\|$)#', '$1', $ret );
702	$ret = $protocol . $base . $ret . $frag;
703	$ret = rtrim( $ret, '?' );
704	return $ret;
705	}
706
707	/**
708	* Removes an item or list from the query string.
709	*
710	* @since 1.5.0
711	*
712	* @param string\|array $key Query key or keys to remove.
713	* @param bool $query When false uses the $_SERVER value.
714	* @return string New URL query string.
715	*/
716	function remove_query_arg( $key, $query=false ) {
717	if ( is_array( $key ) ) { // removing multiple keys
718	foreach ( $key as $k )
719	$query = add_query_arg( $k, false, $query );
720	return $query;
721	}
722	return add_query_arg( $key, false, $query );
723	}
724
725	/**
726	* Walks the array while sanitizing the contents.
727	*
728	* @since 0.71
729	*
730	* @param array $array Array to used to walk while sanitizing contents.
731	* @return array Sanitized $array.
732	*/
733	function add_magic_quotes( $array ) {
734	foreach ( (array) $array as $k => $v ) {
735	if ( is_array( $v ) ) {
736	$array[$k] = add_magic_quotes( $v );
737	} else {
738	$array[$k] = addslashes( $v );
739	}
740	}
741	return $array;
742	}
743
744	/**
745	* HTTP request for URI to retrieve content.
746	*
747	* @since 1.5.1
748	* @uses wp_remote_get()
749	*
750	* @param string $uri URI/URL of web page to retrieve.
751	* @return bool\|string HTTP content. False on failure.
752	*/
753	function wp_remote_fopen( $uri ) {
754	$parsed_url = @parse_url( $uri );
755
756	if ( !$parsed_url \|\| !is_array( $parsed_url ) )
757	return false;
758
759	$options = array();
760	$options['timeout'] = 10;
761
762	$response = wp_remote_get( $uri, $options );
763
764	if ( is_wp_error( $response ) )
765	return false;
766
767	return wp_remote_retrieve_body( $response );
768	}
769
770	/**
771	* Set up the WordPress query.
772	*
773	* @since 2.0.0
774	*
775	* @param string $query_vars Default WP_Query arguments.
776	*/
777	function wp( $query_vars = '' ) {
778	global $wp, $wp_query, $wp_the_query;
779	$wp->main( $query_vars );
780
781	if ( !isset($wp_the_query) )
782	$wp_the_query = $wp_query;
783	}
784
785	/**
786	* Retrieve the description for the HTTP status.
787	*
788	* @since 2.3.0
789	*
790	* @param int $code HTTP status code.
791	* @return string Empty string if not found, or description if found.
792	*/
793	function get_status_header_desc( $code ) {
794	global $wp_header_to_desc;
795
796	$code = absint( $code );
797
798	if ( !isset( $wp_header_to_desc ) ) {
799	$wp_header_to_desc = array(
800	100 => 'Continue',
801	101 => 'Switching Protocols',
802	102 => 'Processing',
803
804	200 => 'OK',
805	201 => 'Created',
806	202 => 'Accepted',
807	203 => 'Non-Authoritative Information',
808	204 => 'No Content',
809	205 => 'Reset Content',
810	206 => 'Partial Content',
811	207 => 'Multi-Status',
812	226 => 'IM Used',
813
814	300 => 'Multiple Choices',
815	301 => 'Moved Permanently',
816	302 => 'Found',
817	303 => 'See Other',
818	304 => 'Not Modified',
819	305 => 'Use Proxy',
820	306 => 'Reserved',
821	307 => 'Temporary Redirect',
822
823	400 => 'Bad Request',
824	401 => 'Unauthorized',
825	402 => 'Payment Required',
826	403 => 'Forbidden',
827	404 => 'Not Found',
828	405 => 'Method Not Allowed',
829	406 => 'Not Acceptable',
830	407 => 'Proxy Authentication Required',
831	408 => 'Request Timeout',
832	409 => 'Conflict',
833	410 => 'Gone',
834	411 => 'Length Required',
835	412 => 'Precondition Failed',
836	413 => 'Request Entity Too Large',
837	414 => 'Request-URI Too Long',
838	415 => 'Unsupported Media Type',
839	416 => 'Requested Range Not Satisfiable',
840	417 => 'Expectation Failed',
841	422 => 'Unprocessable Entity',
842	423 => 'Locked',
843	424 => 'Failed Dependency',
844	426 => 'Upgrade Required',
845
846	500 => 'Internal Server Error',
847	501 => 'Not Implemented',
848	502 => 'Bad Gateway',
849	503 => 'Service Unavailable',
850	504 => 'Gateway Timeout',
851	505 => 'HTTP Version Not Supported',
852	506 => 'Variant Also Negotiates',
853	507 => 'Insufficient Storage',
854	510 => 'Not Extended'
855	);
856	}
857
858	if ( isset( $wp_header_to_desc[$code] ) )
859	return $wp_header_to_desc[$code];
860	else
861	return '';
862	}
863
864	/**
865	* Set HTTP status header.
866	*
867	* @since 2.0.0
868	* @uses apply_filters() Calls 'status_header' on status header string, HTTP
869	* HTTP code, HTTP code description, and protocol string as separate
870	* parameters.
871	*
872	* @param int $header HTTP status code
873	* @return unknown
874	*/
875	function status_header( $header ) {
876	$text = get_status_header_desc( $header );
877
878	if ( empty( $text ) )
879	return false;
880
881	$protocol = $_SERVER["SERVER_PROTOCOL"];
882	if ( 'HTTP/1.1' != $protocol && 'HTTP/1.0' != $protocol )
883	$protocol = 'HTTP/1.0';
884	$status_header = "$protocol $header $text";
885	if ( function_exists( 'apply_filters' ) )
886	$status_header = apply_filters( 'status_header', $status_header, $header, $text, $protocol );
887
888	return @header( $status_header, true, $header );
889	}
890
891	/**
892	* Gets the header information to prevent caching.
893	*
894	* The several different headers cover the different ways cache prevention is handled
895	* by different browsers
896	*
897	* @since 2.8.0
898	*
899	* @uses apply_filters()
900	* @return array The associative array of header names and field values.
901	*/
902	function wp_get_nocache_headers() {
903	$headers = array(
904	'Expires' => 'Wed, 11 Jan 1984 05:00:00 GMT',
905	'Last-Modified' => '',
906	'Cache-Control' => 'no-cache, must-revalidate, max-age=0',
907	'Pragma' => 'no-cache',
908	);
909
910	if ( function_exists('apply_filters') ) {
911	$headers = (array) apply_filters('nocache_headers', $headers);
912	}
913	return $headers;
914	}
915
916	/**
917	* Sets the headers to prevent caching for the different browsers.
918	*
919	* Different browsers support different nocache headers, so several headers must
920	* be sent so that all of them get the point that no caching should occur.
921	*
922	* @since 2.0.0
923	* @uses wp_get_nocache_headers()
924	*/
925	function nocache_headers() {
926	$headers = wp_get_nocache_headers();
927	foreach( $headers as $name => $field_value )
928	@header("{$name}: {$field_value}");
929	if ( empty( $headers['Last-Modified'] ) && function_exists( 'header_remove' ) )
930	@header_remove( 'Last-Modified' );
931	}
932
933	/**
934	* Set the headers for caching for 10 days with JavaScript content type.
935	*
936	* @since 2.1.0
937	*/
938	function cache_javascript_headers() {
939	$expiresOffset = 10 * DAY_IN_SECONDS;
940	header( "Content-Type: text/javascript; charset=" . get_bloginfo( 'charset' ) );
941	header( "Vary: Accept-Encoding" ); // Handle proxies
942	header( "Expires: " . gmdate( "D, d M Y H:i:s", time() + $expiresOffset ) . " GMT" );
943	}
944
945	/**
946	* Retrieve the number of database queries during the WordPress execution.
947	*
948	* @since 2.0.0
949	*
950	* @return int Number of database queries
951	*/
952	function get_num_queries() {
953	global $wpdb;
954	return $wpdb->num_queries;
955	}
956
957	/**
958	* Whether input is yes or no. Must be 'y' to be true.
959	*
960	* @since 1.0.0
961	*
962	* @param string $yn Character string containing either 'y' or 'n'
963	* @return bool True if yes, false on anything else
964	*/
965	function bool_from_yn( $yn ) {
966	return ( strtolower( $yn ) == 'y' );
967	}
968
969	/**
970	* Loads the feed template from the use of an action hook.
971	*
972	* If the feed action does not have a hook, then the function will die with a
973	* message telling the visitor that the feed is not valid.
974	*
975	* It is better to only have one hook for each feed.
976	*
977	* @since 2.1.0
978	* @uses $wp_query Used to tell if the use a comment feed.
979	* @uses do_action() Calls 'do_feed_$feed' hook, if a hook exists for the feed.
980	*/
981	function do_feed() {
982	global $wp_query;
983
984	$feed = get_query_var( 'feed' );
985
986	// Remove the pad, if present.
987	$feed = preg_replace( '/^_+/', '', $feed );
988
989	if ( $feed == '' \|\| $feed == 'feed' )
990	$feed = get_default_feed();
991
992	$hook = 'do_feed_' . $feed;
993	if ( !has_action($hook) ) {
994	$message = sprintf( __( 'ERROR: %s is not a valid feed template.' ), esc_html($feed));
995	wp_die( $message, '', array( 'response' => 404 ) );
996	}
997
998	do_action( $hook, $wp_query->is_comment_feed );
999	}
1000
1001	/**
1002	* Load the RDF RSS 0.91 Feed template.
1003	*
1004	* @since 2.1.0
1005	*/
1006	function do_feed_rdf() {
1007	load_template( ABSPATH . WPINC . '/feed-rdf.php' );
1008	}
1009
1010	/**
1011	* Load the RSS 1.0 Feed Template.
1012	*
1013	* @since 2.1.0
1014	*/
1015	function do_feed_rss() {
1016	load_template( ABSPATH . WPINC . '/feed-rss.php' );
1017	}
1018
1019	/**
1020	* Load either the RSS2 comment feed or the RSS2 posts feed.
1021	*
1022	* @since 2.1.0
1023	*
1024	* @param bool $for_comments True for the comment feed, false for normal feed.
1025	*/
1026	function do_feed_rss2( $for_comments ) {
1027	if ( $for_comments )
1028	load_template( ABSPATH . WPINC . '/feed-rss2-comments.php' );
1029	else
1030	load_template( ABSPATH . WPINC . '/feed-rss2.php' );
1031	}
1032
1033	/**
1034	* Load either Atom comment feed or Atom posts feed.
1035	*
1036	* @since 2.1.0
1037	*
1038	* @param bool $for_comments True for the comment feed, false for normal feed.
1039	*/
1040	function do_feed_atom( $for_comments ) {
1041	if ($for_comments)
1042	load_template( ABSPATH . WPINC . '/feed-atom-comments.php');
1043	else
1044	load_template( ABSPATH . WPINC . '/feed-atom.php' );
1045	}
1046
1047	/**
1048	* Display the robots.txt file content.
1049	*
1050	* The echo content should be with usage of the permalinks or for creating the
1051	* robots.txt file.
1052	*
1053	* @since 2.1.0
1054	* @uses do_action() Calls 'do_robotstxt' hook for displaying robots.txt rules.
1055	*/
1056	function do_robots() {
1057	header( 'Content-Type: text/plain; charset=utf-8' );
1058
1059	do_action( 'do_robotstxt' );
1060
1061	$output = "User-agent: *\n";
1062	$public = get_option( 'blog_public' );
1063	if ( '0' == $public ) {
1064	$output .= "Disallow: /\n";
1065	} else {
1066	$site_url = parse_url( site_url() );
1067	$path = ( !empty( $site_url['path'] ) ) ? $site_url['path'] : '';
1068	$output .= "Disallow: $path/wp-admin/\n";
1069	$output .= "Disallow: $path/wp-includes/\n";
1070	}
1071
1072	echo apply_filters('robots_txt', $output, $public);
1073	}
1074
1075	/**
1076	* Test whether blog is already installed.
1077	*
1078	* The cache will be checked first. If you have a cache plugin, which saves the
1079	* cache values, then this will work. If you use the default WordPress cache,
1080	* and the database goes away, then you might have problems.
1081	*
1082	* Checks for the option siteurl for whether WordPress is installed.
1083	*
1084	* @since 2.1.0
1085	* @uses $wpdb
1086	*
1087	* @return bool Whether blog is already installed.
1088	*/
1089	function is_blog_installed() {
1090	global $wpdb;
1091
1092	// Check cache first. If options table goes away and we have true cached, oh well.
1093	if ( wp_cache_get( 'is_blog_installed' ) )
1094	return true;
1095
1096	$suppress = $wpdb->suppress_errors();
1097	if ( ! defined( 'WP_INSTALLING' ) ) {
1098	$alloptions = wp_load_alloptions();
1099	}
1100	// If siteurl is not set to autoload, check it specifically
1101	if ( !isset( $alloptions['siteurl'] ) )
1102	$installed = $wpdb->get_var( "SELECT option_value FROM $wpdb->options WHERE option_name = 'siteurl'" );
1103	else
1104	$installed = $alloptions['siteurl'];
1105	$wpdb->suppress_errors( $suppress );
1106
1107	$installed = !empty( $installed );
1108	wp_cache_set( 'is_blog_installed', $installed );
1109
1110	if ( $installed )
1111	return true;
1112
1113	// If visiting repair.php, return true and let it take over.
1114	if ( defined( 'WP_REPAIRING' ) )
1115	return true;
1116
1117	$suppress = $wpdb->suppress_errors();
1118
1119	// Loop over the WP tables. If none exist, then scratch install is allowed.
1120	// If one or more exist, suggest table repair since we got here because the options
1121	// table could not be accessed.
1122	$wp_tables = $wpdb->tables();
1123	foreach ( $wp_tables as $table ) {
1124	// The existence of custom user tables shouldn't suggest an insane state or prevent a clean install.
1125	if ( defined( 'CUSTOM_USER_TABLE' ) && CUSTOM_USER_TABLE == $table )
1126	continue;
1127	if ( defined( 'CUSTOM_USER_META_TABLE' ) && CUSTOM_USER_META_TABLE == $table )
1128	continue;
1129
1130	if ( ! $wpdb->get_results( "DESCRIBE $table;" ) )
1131	continue;
1132
1133	// One or more tables exist. We are insane.
1134
1135	wp_load_translations_early();
1136
1137	// Die with a DB error.
1138	$wpdb->error = sprintf( __( 'One or more database tables are unavailable. The database may need to be <a href="%s">repaired</a>.' ), 'maint/repair.php?referrer=is_blog_installed' );
1139	dead_db();
1140	}
1141
1142	$wpdb->suppress_errors( $suppress );
1143
1144	wp_cache_set( 'is_blog_installed', false );
1145
1146	return false;
1147	}
1148
1149	/**
1150	* Retrieve URL with nonce added to URL query.
1151	*
1152	* @package WordPress
1153	* @subpackage Security
1154	* @since 2.0.4
1155	*
1156	* @param string $actionurl URL to add nonce action
1157	* @param string $action Optional. Nonce action name
1158	* @param string $arg Optional. Nonce URL argument
1159	* @return string URL with nonce action added.
1160	*/
1161	function wp_nonce_url( $actionurl, $action = -1, $arg = '_wpnonce' ) {
1162	$actionurl = str_replace( '&', '&', $actionurl );
1163	return esc_html( add_query_arg( $arg, wp_create_nonce( $action ), $actionurl ) );
1164	}
1165
1166	/**
1167	* Retrieve or display nonce hidden field for forms.
1168	*
1169	* The nonce field is used to validate that the contents of the form came from
1170	* the location on the current site and not somewhere else. The nonce does not
1171	* offer absolute protection, but should protect against most cases. It is very
1172	* important to use nonce field in forms.
1173	*
1174	* The $action and $name are optional, but if you want to have better security,
1175	* it is strongly suggested to set those two parameters. It is easier to just
1176	* call the function without any parameters, because validation of the nonce
1177	* doesn't require any parameters, but since crackers know what the default is
1178	* it won't be difficult for them to find a way around your nonce and cause
1179	* damage.
1180	*
1181	* The input name will be whatever $name value you gave. The input value will be
1182	* the nonce creation value.
1183	*
1184	* @package WordPress
1185	* @subpackage Security
1186	* @since 2.0.4
1187	*
1188	* @param string $action Optional. Action name.
1189	* @param string $name Optional. Nonce name.
1190	* @param bool $referer Optional, default true. Whether to set the referer field for validation.
1191	* @param bool $echo Optional, default true. Whether to display or return hidden form field.
1192	* @return string Nonce field.
1193	*/
1194	function wp_nonce_field( $action = -1, $name = "_wpnonce", $referer = true , $echo = true ) {
1195	$name = esc_attr( $name );
1196	$nonce_field = '<input type="hidden" id="' . $name . '" name="' . $name . '" value="' . wp_create_nonce( $action ) . '" />';
1197
1198	if ( $referer )
1199	$nonce_field .= wp_referer_field( false );
1200
1201	if ( $echo )
1202	echo $nonce_field;
1203
1204	return $nonce_field;
1205	}
1206
1207	/**
1208	* Retrieve or display referer hidden field for forms.
1209	*
1210	* The referer link is the current Request URI from the server super global. The
1211	* input name is '_wp_http_referer', in case you wanted to check manually.
1212	*
1213	* @package WordPress
1214	* @subpackage Security
1215	* @since 2.0.4
1216	*
1217	* @param bool $echo Whether to echo or return the referer field.
1218	* @return string Referer field.
1219	*/
1220	function wp_referer_field( $echo = true ) {
1221	$ref = esc_attr( $_SERVER['REQUEST_URI'] );
1222	$referer_field = '<input type="hidden" name="_wp_http_referer" value="'. $ref . '" />';
1223
1224	if ( $echo )
1225	echo $referer_field;
1226	return $referer_field;
1227	}
1228
1229	/**
1230	* Retrieve or display original referer hidden field for forms.
1231	*
1232	* The input name is '_wp_original_http_referer' and will be either the same
1233	* value of {@link wp_referer_field()}, if that was posted already or it will
1234	* be the current page, if it doesn't exist.
1235	*
1236	* @package WordPress
1237	* @subpackage Security
1238	* @since 2.0.4
1239	*
1240	* @param bool $echo Whether to echo the original http referer
1241	* @param string $jump_back_to Optional, default is 'current'. Can be 'previous' or page you want to jump back to.
1242	* @return string Original referer field.
1243	*/
1244	function wp_original_referer_field( $echo = true, $jump_back_to = 'current' ) {
1245	$jump_back_to = ( 'previous' == $jump_back_to ) ? wp_get_referer() : $_SERVER['REQUEST_URI'];
1246	$ref = ( wp_get_original_referer() ) ? wp_get_original_referer() : $jump_back_to;
1247	$orig_referer_field = '<input type="hidden" name="_wp_original_http_referer" value="' . esc_attr( stripslashes( $ref ) ) . '" />';
1248	if ( $echo )
1249	echo $orig_referer_field;
1250	return $orig_referer_field;
1251	}
1252
1253	/**
1254	* Retrieve referer from '_wp_http_referer' or HTTP referer. If it's the same
1255	* as the current request URL, will return false.
1256	*
1257	* @package WordPress
1258	* @subpackage Security
1259	* @since 2.0.4
1260	*
1261	* @return string\|bool False on failure. Referer URL on success.
1262	*/
1263	function wp_get_referer() {
1264	$ref = false;
1265	if ( ! empty( $_REQUEST['_wp_http_referer'] ) )
1266	$ref = $_REQUEST['_wp_http_referer'];
1267	else if ( ! empty( $_SERVER['HTTP_REFERER'] ) )
1268	$ref = $_SERVER['HTTP_REFERER'];
1269
1270	if ( $ref && $ref !== $_SERVER['REQUEST_URI'] )
1271	return $ref;
1272	return false;
1273	}
1274
1275	/**
1276	* Retrieve original referer that was posted, if it exists.
1277	*
1278	* @package WordPress
1279	* @subpackage Security
1280	* @since 2.0.4
1281	*
1282	* @return string\|bool False if no original referer or original referer if set.
1283	*/
1284	function wp_get_original_referer() {
1285	if ( !empty( $_REQUEST['_wp_original_http_referer'] ) )
1286	return $_REQUEST['_wp_original_http_referer'];
1287	return false;
1288	}
1289
1290	/**
1291	* Recursive directory creation based on full path.
1292	*
1293	* Will attempt to set permissions on folders.
1294	*
1295	* @since 2.0.1
1296	*
1297	* @param string $target Full path to attempt to create.
1298	* @return bool Whether the path was created. True if path already exists.
1299	*/
1300	function wp_mkdir_p( $target ) {
1301	$wrapper = null;
1302
1303	// strip the protocol
1304	if( wp_is_stream( $target ) ) {
1305	list( $wrapper, $target ) = explode( '://', $target, 2 );
1306	}
1307
1308	// from php.net/mkdir user contributed notes
1309	$target = str_replace( '//', '/', $target );
1310
1311	// put the wrapper back on the target
1312	if( $wrapper !== null ) {
1313	$target = $wrapper . '://' . $target;
1314	}
1315
1316	// safe mode fails with a trailing slash under certain PHP versions.
1317	$target = rtrim($target, '/'); // Use rtrim() instead of untrailingslashit to avoid formatting.php dependency.
1318	if ( empty($target) )
1319	$target = '/';
1320
1321	if ( file_exists( $target ) )
1322	return @is_dir( $target );
1323
1324	// Attempting to create the directory may clutter up our display.
1325	if ( @mkdir( $target ) ) {
1326	$stat = @stat( dirname( $target ) );
1327	$dir_perms = $stat['mode'] & 0007777; // Get the permission bits.
1328	@chmod( $target, $dir_perms );
1329	return true;
1330	} elseif ( is_dir( dirname( $target ) ) ) {
1331	return false;
1332	}
1333
1334	// If the above failed, attempt to create the parent node, then try again.
1335	if ( ( $target != '/' ) && ( wp_mkdir_p( dirname( $target ) ) ) )
1336	return wp_mkdir_p( $target );
1337
1338	return false;
1339	}
1340
1341	/**
1342	* Test if a give filesystem path is absolute ('/foo/bar', 'c:\windows').
1343	*
1344	* @since 2.5.0
1345	*
1346	* @param string $path File path
1347	* @return bool True if path is absolute, false is not absolute.
1348	*/
1349	function path_is_absolute( $path ) {
1350	// this is definitive if true but fails if $path does not exist or contains a symbolic link
1351	if ( realpath($path) == $path )
1352	return true;
1353
1354	if ( strlen($path) == 0 \|\| $path[0] == '.' )
1355	return false;
1356
1357	// windows allows absolute paths like this
1358	if ( preg_match('#^[a-zA-Z]:\\\\#', $path) )
1359	return true;
1360
1361	// a path starting with / or \ is absolute; anything else is relative
1362	return ( $path[0] == '/' \|\| $path[0] == '\\' );
1363	}
1364
1365	/**
1366	* Join two filesystem paths together (e.g. 'give me $path relative to $base').
1367	*
1368	* If the $path is absolute, then it the full path is returned.
1369	*
1370	* @since 2.5.0
1371	*
1372	* @param string $base
1373	* @param string $path
1374	* @return string The path with the base or absolute path.
1375	*/
1376	function path_join( $base, $path ) {
1377	if ( path_is_absolute($path) )
1378	return $path;
1379
1380	return rtrim($base, '/') . '/' . ltrim($path, '/');
1381	}
1382
1383	/**
1384	* Determines a writable directory for temporary files.
1385	* Function's preference is the return value of <code>sys_get_temp_dir()</code>,
1386	* followed by your PHP temporary upload directory, followed by WP_CONTENT_DIR,
1387	* before finally defaulting to /tmp/
1388	*
1389	* In the event that this function does not find a writable location,
1390	* It may be overridden by the <code>WP_TEMP_DIR</code> constant in
1391	* your <code>wp-config.php</code> file.
1392	*
1393	* @since 2.5.0
1394	*
1395	* @return string Writable temporary directory
1396	*/
1397	function get_temp_dir() {
1398	static $temp;
1399	if ( defined('WP_TEMP_DIR') )
1400	return trailingslashit(WP_TEMP_DIR);
1401
1402	if ( $temp )
1403	return trailingslashit( rtrim( $temp, '\\' ) );
1404
1405	$is_win = ( 'WIN' === strtoupper( substr( PHP_OS, 0, 3 ) ) );
1406
1407	if ( function_exists('sys_get_temp_dir') ) {
1408	$temp = sys_get_temp_dir();
1409	if ( @is_dir( $temp ) && ( $is_win ? win_is_writable( $temp ) : @is_writable( $temp ) ) ) {
1410	return trailingslashit( rtrim( $temp, '\\' ) );
1411	}
1412	}
1413
1414	$temp = ini_get('upload_tmp_dir');
1415	if ( is_dir( $temp ) && ( $is_win ? win_is_writable( $temp ) : @is_writable( $temp ) ) )
1416	return trailingslashit( rtrim( $temp, '\\' ) );
1417
1418	$temp = WP_CONTENT_DIR . '/';
1419	if ( is_dir( $temp ) && ( $is_win ? win_is_writable( $temp ) : @is_writable( $temp ) ) )
1420	return $temp;
1421
1422	$temp = '/tmp/';
1423	return $temp;
1424	}
1425
1426	/**
1427	* Workaround for Windows bug in is_writable() function
1428	*
1429	* @since 2.8.0
1430	*
1431	* @param string $path
1432	* @return bool
1433	*/
1434	function win_is_writable( $path ) {
1435	/* will work in despite of Windows ACLs bug
1436	* NOTE: use a trailing slash for folders!!!
1437	* see http://bugs.php.net/bug.php?id=27609
1438	* see http://bugs.php.net/bug.php?id=30931
1439	*/
1440
1441	if ( $path[strlen( $path ) - 1] == '/' ) // recursively return a temporary file path
1442	return win_is_writable( $path . uniqid( mt_rand() ) . '.tmp');
1443	else if ( is_dir( $path ) )
1444	return win_is_writable( $path . '/' . uniqid( mt_rand() ) . '.tmp' );
1445	// check tmp file for read/write capabilities
1446	$should_delete_tmp_file = !file_exists( $path );
1447	$f = @fopen( $path, 'a' );
1448	if ( $f === false )
1449	return false;
1450	fclose( $f );
1451	if ( $should_delete_tmp_file )
1452	unlink( $path );
1453	return true;
1454	}
1455
1456	/**
1457	* Get an array containing the current upload directory's path and url.
1458	*
1459	* Checks the 'upload_path' option, which should be from the web root folder,
1460	* and if it isn't empty it will be used. If it is empty, then the path will be
1461	* 'WP_CONTENT_DIR/uploads'. If the 'UPLOADS' constant is defined, then it will
1462	* override the 'upload_path' option and 'WP_CONTENT_DIR/uploads' path.
1463	*
1464	* The upload URL path is set either by the 'upload_url_path' option or by using
1465	* the 'WP_CONTENT_URL' constant and appending '/uploads' to the path.
1466	*
1467	* If the 'uploads_use_yearmonth_folders' is set to true (checkbox if checked in
1468	* the administration settings panel), then the time will be used. The format
1469	* will be year first and then month.
1470	*
1471	* If the path couldn't be created, then an error will be returned with the key
1472	* 'error' containing the error message. The error suggests that the parent
1473	* directory is not writable by the server.
1474	*
1475	* On success, the returned array will have many indices:
1476	* 'path' - base directory and sub directory or full path to upload directory.
1477	* 'url' - base url and sub directory or absolute URL to upload directory.
1478	* 'subdir' - sub directory if uploads use year/month folders option is on.
1479	* 'basedir' - path without subdir.
1480	* 'baseurl' - URL path without subdir.
1481	* 'error' - set to false.
1482	*
1483	* @since 2.0.0
1484	* @uses apply_filters() Calls 'upload_dir' on returned array.
1485	*
1486	* @param string $time Optional. Time formatted in 'yyyy/mm'.
1487	* @return array See above for description.
1488	*/
1489	function wp_upload_dir( $time = null ) {
1490	$siteurl = get_option( 'siteurl' );
1491	$upload_path = trim( get_option( 'upload_path' ) );
1492
1493	if ( empty( $upload_path ) \|\| 'wp-content/uploads' == $upload_path ) {
1494	$dir = WP_CONTENT_DIR . '/uploads';
1495	} elseif ( 0 !== strpos( $upload_path, ABSPATH ) ) {
1496	// $dir is absolute, $upload_path is (maybe) relative to ABSPATH
1497	$dir = path_join( ABSPATH, $upload_path );
1498	} else {
1499	$dir = $upload_path;
1500	}
1501
1502	if ( !$url = get_option( 'upload_url_path' ) ) {
1503	if ( empty($upload_path) \|\| ( 'wp-content/uploads' == $upload_path ) \|\| ( $upload_path == $dir ) )
1504	$url = WP_CONTENT_URL . '/uploads';
1505	else
1506	$url = trailingslashit( $siteurl ) . $upload_path;
1507	}
1508
1509	// Obey the value of UPLOADS. This happens as long as ms-files rewriting is disabled.
1510	// We also sometimes obey UPLOADS when rewriting is enabled -- see the next block.
1511	if ( defined( 'UPLOADS' ) && ! ( is_multisite() && get_site_option( 'ms_files_rewriting' ) ) ) {
1512	$dir = ABSPATH . UPLOADS;
1513	$url = trailingslashit( $siteurl ) . UPLOADS;
1514	}
1515
1516	// If multisite (and if not the main site in a post-MU network)
1517	if ( is_multisite() && ! ( is_main_site() && defined( 'MULTISITE' ) ) ) {
1518
1519	if ( ! get_site_option( 'ms_files_rewriting' ) ) {
1520	// If ms-files rewriting is disabled (networks created post-3.5), it is fairly straightforward:
1521	// Append sites/%d if we're not on the main site (for post-MU networks). (The extra directory
1522	// prevents a four-digit ID from conflicting with a year-based directory for the main site.
1523	// But if a MU-era network has disabled ms-files rewriting manually, they don't need the extra
1524	// directory, as they never had wp-content/uploads for the main site.)
1525
1526	if ( defined( 'MULTISITE' ) )
1527	$ms_dir = '/sites/' . get_current_blog_id();
1528	else
1529	$ms_dir = '/' . get_current_blog_id();
1530
1531	$dir .= $ms_dir;
1532	$url .= $ms_dir;
1533
1534	} elseif ( defined( 'UPLOADS' ) && ! ms_is_switched() ) {
1535	// Handle the old-form ms-files.php rewriting if the network still has that enabled.
1536	// When ms-files rewriting is enabled, then we only listen to UPLOADS when:
1537	// 1) we are not on the main site in a post-MU network,
1538	// as wp-content/uploads is used there, and
1539	// 2) we are not switched, as ms_upload_constants() hardcodes
1540	// these constants to reflect the original blog ID.
1541
1542	if ( defined( 'BLOGUPLOADDIR' ) )
1543	$dir = untrailingslashit( BLOGUPLOADDIR );
1544	$url = str_replace( UPLOADS, 'files', $url );
1545	}
1546	}
1547
1548	$basedir = $dir;
1549	$baseurl = $url;
1550
1551	$subdir = '';
1552	if ( get_option( 'uploads_use_yearmonth_folders' ) ) {
1553	// Generate the yearly and monthly dirs
1554	if ( !$time )
1555	$time = current_time( 'mysql' );
1556	$y = substr( $time, 0, 4 );
1557	$m = substr( $time, 5, 2 );
1558	$subdir = "/$y/$m";
1559	}
1560
1561	$dir .= $subdir;
1562	$url .= $subdir;
1563
1564	$uploads = apply_filters( 'upload_dir',
1565	array(
1566	'path' => $dir,
1567	'url' => $url,
1568	'subdir' => $subdir,
1569	'basedir' => $basedir,
1570	'baseurl' => $baseurl,
1571	'error' => false,
1572	) );
1573
1574	// Make sure we have an uploads dir
1575	if ( ! wp_mkdir_p( $uploads['path'] ) ) {
1576	if ( 0 === strpos( $uploads['basedir'], ABSPATH ) )
1577	$error_path = str_replace( ABSPATH, '', $uploads['basedir'] ) . $uploads['subdir'];
1578	else
1579	$error_path = basename( $uploads['basedir'] ) . $uploads['subdir'];
1580
1581	$message = sprintf( __( 'Unable to create directory %s. Is its parent directory writable by the server?' ), $error_path );
1582	$uploads['error'] = $message;
1583	}
1584
1585	return $uploads;
1586	}
1587
1588	/**
1589	* Get a filename that is sanitized and unique for the given directory.
1590	*
1591	* If the filename is not unique, then a number will be added to the filename
1592	* before the extension, and will continue adding numbers until the filename is
1593	* unique.
1594	*
1595	* The callback is passed three parameters, the first one is the directory, the
1596	* second is the filename, and the third is the extension.
1597	*
1598	* @since 2.5.0
1599	*
1600	* @param string $dir
1601	* @param string $filename
1602	* @param mixed $unique_filename_callback Callback.
1603	* @return string New filename, if given wasn't unique.
1604	*/
1605	function wp_unique_filename( $dir, $filename, $unique_filename_callback = null ) {
1606	// sanitize the file name before we begin processing
1607	$filename = sanitize_file_name($filename);
1608
1609	// separate the filename into a name and extension
1610	$info = pathinfo($filename);
1611	$ext = !empty($info['extension']) ? '.' . $info['extension'] : '';
1612	$name = basename($filename, $ext);
1613
1614	// edge case: if file is named '.ext', treat as an empty name
1615	if ( $name === $ext )
1616	$name = '';
1617
1618	// Increment the file number until we have a unique file to save in $dir. Use callback if supplied.
1619	if ( $unique_filename_callback && is_callable( $unique_filename_callback ) ) {
1620	$filename = call_user_func( $unique_filename_callback, $dir, $name, $ext );
1621	} else {
1622	$number = '';
1623
1624	// change '.ext' to lower case
1625	if ( $ext && strtolower($ext) != $ext ) {
1626	$ext2 = strtolower($ext);
1627	$filename2 = preg_replace( '\|' . preg_quote($ext) . '$\|', $ext2, $filename );
1628
1629	// check for both lower and upper case extension or image sub-sizes may be overwritten
1630	while ( file_exists($dir . "/$filename") \|\| file_exists($dir . "/$filename2") ) {
1631	$new_number = $number + 1;
1632	$filename = str_replace( "$number$ext", "$new_number$ext", $filename );
1633	$filename2 = str_replace( "$number$ext2", "$new_number$ext2", $filename2 );
1634	$number = $new_number;
1635	}
1636	return $filename2;
1637	}
1638
1639	while ( file_exists( $dir . "/$filename" ) ) {
1640	if ( '' == "$number$ext" )
1641	$filename = $filename . ++$number . $ext;
1642	else
1643	$filename = str_replace( "$number$ext", ++$number . $ext, $filename );
1644	}
1645	}
1646
1647	return $filename;
1648	}
1649
1650	/**
1651	* Create a file in the upload folder with given content.
1652	*
1653	* If there is an error, then the key 'error' will exist with the error message.
1654	* If success, then the key 'file' will have the unique file path, the 'url' key
1655	* will have the link to the new file. and the 'error' key will be set to false.
1656	*
1657	* This function will not move an uploaded file to the upload folder. It will
1658	* create a new file with the content in $bits parameter. If you move the upload
1659	* file, read the content of the uploaded file, and then you can give the
1660	* filename and content to this function, which will add it to the upload
1661	* folder.
1662	*
1663	* The permissions will be set on the new file automatically by this function.
1664	*
1665	* @since 2.0.0
1666	*
1667	* @param string $name
1668	* @param null $deprecated Never used. Set to null.
1669	* @param mixed $bits File content
1670	* @param string $time Optional. Time formatted in 'yyyy/mm'.
1671	* @return array
1672	*/
1673	function wp_upload_bits( $name, $deprecated, $bits, $time = null ) {
1674	if ( !empty( $deprecated ) )
1675	_deprecated_argument( __FUNCTION__, '2.0' );
1676
1677	if ( empty( $name ) )
1678	return array( 'error' => __( 'Empty filename' ) );
1679
1680	$wp_filetype = wp_check_filetype( $name );
1681	if ( !$wp_filetype['ext'] )
1682	return array( 'error' => __( 'Invalid file type' ) );
1683
1684	$upload = wp_upload_dir( $time );
1685
1686	if ( $upload['error'] !== false )
1687	return $upload;
1688
1689	$upload_bits_error = apply_filters( 'wp_upload_bits', array( 'name' => $name, 'bits' => $bits, 'time' => $time ) );
1690	if ( !is_array( $upload_bits_error ) ) {
1691	$upload[ 'error' ] = $upload_bits_error;
1692	return $upload;
1693	}
1694
1695	$filename = wp_unique_filename( $upload['path'], $name );
1696
1697	$new_file = $upload['path'] . "/$filename";
1698	if ( ! wp_mkdir_p( dirname( $new_file ) ) ) {
1699	if ( 0 === strpos( $upload['basedir'], ABSPATH ) )
1700	$error_path = str_replace( ABSPATH, '', $upload['basedir'] ) . $upload['subdir'];
1701	else
1702	$error_path = basename( $upload['basedir'] ) . $upload['subdir'];
1703
1704	$message = sprintf( __( 'Unable to create directory %s. Is its parent directory writable by the server?' ), $error_path );
1705	return array( 'error' => $message );
1706	}
1707
1708	$ifp = @ fopen( $new_file, 'wb' );
1709	if ( ! $ifp )
1710	return array( 'error' => sprintf( __( 'Could not write file %s' ), $new_file ) );
1711
1712	@fwrite( $ifp, $bits );
1713	fclose( $ifp );
1714	clearstatcache();
1715
1716	// Set correct file permissions
1717	$stat = @ stat( dirname( $new_file ) );
1718	$perms = $stat['mode'] & 0007777;
1719	$perms = $perms & 0000666;
1720	@ chmod( $new_file, $perms );
1721	clearstatcache();
1722
1723	// Compute the URL
1724	$url = $upload['url'] . "/$filename";
1725
1726	return array( 'file' => $new_file, 'url' => $url, 'error' => false );
1727	}
1728
1729	/**
1730	* Retrieve the file type based on the extension name.
1731	*
1732	* @package WordPress
1733	* @since 2.5.0
1734	* @uses apply_filters() Calls 'ext2type' hook on default supported types.
1735	*
1736	* @param string $ext The extension to search.
1737	* @return string\|null The file type, example: audio, video, document, spreadsheet, etc. Null if not found.
1738	*/
1739	function wp_ext2type( $ext ) {
1740	$ext2type = apply_filters( 'ext2type', array(
1741	'audio' => array( 'aac', 'ac3', 'aif', 'aiff', 'm3a', 'm4a', 'm4b', 'mka', 'mp1', 'mp2', 'mp3', 'ogg', 'oga', 'ram', 'wav', 'wma' ),
1742	'video' => array( 'asf', 'avi', 'divx', 'dv', 'flv', 'm4v', 'mkv', 'mov', 'mp4', 'mpeg', 'mpg', 'mpv', 'ogm', 'ogv', 'qt', 'rm', 'vob', 'wmv' ),
1743	'document' => array( 'doc', 'docx', 'docm', 'dotm', 'odt', 'pages', 'pdf', 'rtf', 'wp', 'wpd' ),
1744	'spreadsheet' => array( 'numbers', 'ods', 'xls', 'xlsx', 'xlsm', 'xlsb' ),
1745	'interactive' => array( 'swf', 'key', 'ppt', 'pptx', 'pptm', 'pps', 'ppsx', 'ppsm', 'sldx', 'sldm', 'odp' ),
1746	'text' => array( 'asc', 'csv', 'tsv', 'txt' ),
1747	'archive' => array( 'bz2', 'cab', 'dmg', 'gz', 'rar', 'sea', 'sit', 'sqx', 'tar', 'tgz', 'zip', '7z' ),
1748	'code' => array( 'css', 'htm', 'html', 'php', 'js' ),
1749	));
1750	foreach ( $ext2type as $type => $exts )
1751	if ( in_array( $ext, $exts ) )
1752	return $type;
1753	}
1754
1755	/**
1756	* Retrieve the file type from the file name.
1757	*
1758	* You can optionally define the mime array, if needed.
1759	*
1760	* @since 2.0.4
1761	*
1762	* @param string $filename File name or path.
1763	* @param array $mimes Optional. Key is the file extension with value as the mime type.
1764	* @return array Values with extension first and mime type.
1765	*/
1766	function wp_check_filetype( $filename, $mimes = null ) {
1767	if ( empty($mimes) )
1768	$mimes = get_allowed_mime_types();
1769	$type = false;
1770	$ext = false;
1771
1772	foreach ( $mimes as $ext_preg => $mime_match ) {
1773	$ext_preg = '!\.(' . $ext_preg . ')$!i';
1774	if ( preg_match( $ext_preg, $filename, $ext_matches ) ) {
1775	$type = $mime_match;
1776	$ext = $ext_matches[1];
1777	break;
1778	}
1779	}
1780
1781	return compact( 'ext', 'type' );
1782	}
1783
1784	/**
1785	* Attempt to determine the real file type of a file.
1786	* If unable to, the file name extension will be used to determine type.
1787	*
1788	* If it's determined that the extension does not match the file's real type,
1789	* then the "proper_filename" value will be set with a proper filename and extension.
1790	*
1791	* Currently this function only supports validating images known to getimagesize().
1792	*
1793	* @since 3.0.0
1794	*
1795	* @param string $file Full path to the image.
1796	* @param string $filename The filename of the image (may differ from $file due to $file being in a tmp directory)
1797	* @param array $mimes Optional. Key is the file extension with value as the mime type.
1798	* @return array Values for the extension, MIME, and either a corrected filename or false if original $filename is valid
1799	*/
1800	function wp_check_filetype_and_ext( $file, $filename, $mimes = null ) {
1801
1802	$proper_filename = false;
1803
1804	// Do basic extension validation and MIME mapping
1805	$wp_filetype = wp_check_filetype( $filename, $mimes );
1806	extract( $wp_filetype );
1807
1808	// We can't do any further validation without a file to work with
1809	if ( ! file_exists( $file ) )
1810	return compact( 'ext', 'type', 'proper_filename' );
1811
1812	// We're able to validate images using GD
1813	if ( $type && 0 === strpos( $type, 'image/' ) && function_exists('getimagesize') ) {
1814
1815	// Attempt to figure out what type of image it actually is
1816	$imgstats = @getimagesize( $file );
1817
1818	// If getimagesize() knows what kind of image it really is and if the real MIME doesn't match the claimed MIME
1819	if ( !empty($imgstats['mime']) && $imgstats['mime'] != $type ) {
1820	// This is a simplified array of MIMEs that getimagesize() can detect and their extensions
1821	// You shouldn't need to use this filter, but it's here just in case
1822	$mime_to_ext = apply_filters( 'getimagesize_mimes_to_exts', array(
1823	'image/jpeg' => 'jpg',
1824	'image/png' => 'png',
1825	'image/gif' => 'gif',
1826	'image/bmp' => 'bmp',
1827	'image/tiff' => 'tif',
1828	) );
1829
1830	// Replace whatever is after the last period in the filename with the correct extension
1831	if ( ! empty( $mime_to_ext[ $imgstats['mime'] ] ) ) {
1832	$filename_parts = explode( '.', $filename );
1833	array_pop( $filename_parts );
1834	$filename_parts[] = $mime_to_ext[ $imgstats['mime'] ];
1835	$new_filename = implode( '.', $filename_parts );
1836
1837	if ( $new_filename != $filename )
1838	$proper_filename = $new_filename; // Mark that it changed
1839
1840	// Redefine the extension / MIME
1841	$wp_filetype = wp_check_filetype( $new_filename, $mimes );
1842	extract( $wp_filetype );
1843	}
1844	}
1845	}
1846
1847	// Let plugins try and validate other types of files
1848	// Should return an array in the style of array( 'ext' => $ext, 'type' => $type, 'proper_filename' => $proper_filename )
1849	return apply_filters( 'wp_check_filetype_and_ext', compact( 'ext', 'type', 'proper_filename' ), $file, $filename, $mimes );
1850	}
1851
1852	/**
1853	* Retrieve list of mime types and file extensions.
1854	*
1855	* @since 3.5.0
1856	*
1857	* @uses apply_filters() Calls 'mime_types' on returned array. This filter should
1858	* be used to add types, not remove them. To remove types use the upload_mimes filter.
1859	*
1860	* @return array Array of mime types keyed by the file extension regex corresponding to those types.
1861	*/
1862	function wp_get_mime_types() {
1863	// Accepted MIME types are set here as PCRE unless provided.
1864	return apply_filters( 'mime_types', array(
1865	// Image formats
1866	'jpg\|jpeg\|jpe' => 'image/jpeg',
1867	'gif' => 'image/gif',
1868	'png' => 'image/png',
1869	'bmp' => 'image/bmp',
1870	'tif\|tiff' => 'image/tiff',
1871	'ico' => 'image/x-icon',
1872	// Video formats
1873	'asf\|asx\|wax\|wmv\|wmx' => 'video/asf',
1874	'avi' => 'video/avi',
1875	'divx' => 'video/divx',
1876	'flv' => 'video/x-flv',
1877	'mov\|qt' => 'video/quicktime',
1878	'mpeg\|mpg\|mpe' => 'video/mpeg',
1879	'mp4\|m4v' => 'video/mp4',
1880	'ogv' => 'video/ogg',
1881	'mkv' => 'video/x-matroska',
1882	// Text formats
1883	'txt\|asc\|c\|cc\|h' => 'text/plain',
1884	'csv' => 'text/csv',
1885	'tsv' => 'text/tab-separated-values',
1886	'ics' => 'text/calendar',
1887	'rtx' => 'text/richtext',
1888	'css' => 'text/css',
1889	'htm\|html' => 'text/html',
1890	// Audio formats
1891	'mp3\|m4a\|m4b' => 'audio/mpeg',
1892	'ra\|ram' => 'audio/x-realaudio',
1893	'wav' => 'audio/wav',
1894	'ogg\|oga' => 'audio/ogg',
1895	'mid\|midi' => 'audio/midi',
1896	'wma' => 'audio/wma',
1897	'mka' => 'audio/x-matroska',
1898	// Misc application formats
1899	'rtf' => 'application/rtf',
1900	'js' => 'application/javascript',
1901	'pdf' => 'application/pdf',
1902	'swf' => 'application/x-shockwave-flash',
1903	'class' => 'application/java',
1904	'tar' => 'application/x-tar',
1905	'zip' => 'application/zip',
1906	'gz\|gzip' => 'application/x-gzip',
1907	'rar' => 'application/rar',
1908	'7z' => 'application/x-7z-compressed',
1909	'exe' => 'application/x-msdownload',
1910	// MS Office formats
1911	'doc' => 'application/msword',
1912	'pot\|pps\|ppt' => 'application/vnd.ms-powerpoint',
1913	'wri' => 'application/vnd.ms-write',
1914	'xla\|xls\|xlt\|xlw' => 'application/vnd.ms-excel',
1915	'mdb' => 'application/vnd.ms-access',
1916	'mpp' => 'application/vnd.ms-project',
1917	'docx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
1918	'docm' => 'application/vnd.ms-word.document.macroEnabled.12',
1919	'dotx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.template',
1920	'dotm' => 'application/vnd.ms-word.template.macroEnabled.12',
1921	'xlsx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
1922	'xlsm' => 'application/vnd.ms-excel.sheet.macroEnabled.12',
1923	'xlsb' => 'application/vnd.ms-excel.sheet.binary.macroEnabled.12',
1924	'xltx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.template',
1925	'xltm' => 'application/vnd.ms-excel.template.macroEnabled.12',
1926	'xlam' => 'application/vnd.ms-excel.addin.macroEnabled.12',
1927	'pptx' => 'application/vnd.openxmlformats-officedocument.presentationml.presentation',
1928	'pptm' => 'application/vnd.ms-powerpoint.presentation.macroEnabled.12',
1929	'ppsx' => 'application/vnd.openxmlformats-officedocument.presentationml.slideshow',
1930	'ppsm' => 'application/vnd.ms-powerpoint.slideshow.macroEnabled.12',
1931	'potx' => 'application/vnd.openxmlformats-officedocument.presentationml.template',
1932	'potm' => 'application/vnd.ms-powerpoint.template.macroEnabled.12',
1933	'ppam' => 'application/vnd.ms-powerpoint.addin.macroEnabled.12',
1934	'sldx' => 'application/vnd.openxmlformats-officedocument.presentationml.slide',
1935	'sldm' => 'application/vnd.ms-powerpoint.slide.macroEnabled.12',
1936	'onetoc\|onetoc2\|onetmp\|onepkg' => 'application/onenote',
1937	// OpenOffice formats
1938	'odt' => 'application/vnd.oasis.opendocument.text',
1939	'odp' => 'application/vnd.oasis.opendocument.presentation',
1940	'ods' => 'application/vnd.oasis.opendocument.spreadsheet',
1941	'odg' => 'application/vnd.oasis.opendocument.graphics',
1942	'odc' => 'application/vnd.oasis.opendocument.chart',
1943	'odb' => 'application/vnd.oasis.opendocument.database',
1944	'odf' => 'application/vnd.oasis.opendocument.formula',
1945	// WordPerfect formats
1946	'wp\|wpd' => 'application/wordperfect',
1947	) );
1948	}
1949	/**
1950	* Retrieve list of allowed mime types and file extensions.
1951	*
1952	* @since 2.8.6
1953	*
1954	* @uses apply_filters() Calls 'upload_mimes' on returned array
1955	* @uses wp_get_upload_mime_types() to fetch the list of mime types
1956	*
1957	* @return array Array of mime types keyed by the file extension regex corresponding to those types.
1958	*/
1959	function get_allowed_mime_types() {
1960	return apply_filters( 'upload_mimes', wp_get_mime_types() );
1961	}
1962
1963	/**
1964	* Display "Are You Sure" message to confirm the action being taken.
1965	*
1966	* If the action has the nonce explain message, then it will be displayed along
1967	* with the "Are you sure?" message.
1968	*
1969	* @package WordPress
1970	* @subpackage Security
1971	* @since 2.0.4
1972	*
1973	* @param string $action The nonce action.
1974	*/
1975	function wp_nonce_ays( $action ) {
1976	$title = __( 'WordPress Failure Notice' );
1977	if ( 'log-out' == $action ) {
1978	$html = sprintf( __( 'You are attempting to log out of %s' ), get_bloginfo( 'name' ) ) . '</p><p>';
1979	$html .= sprintf( __( "Do you really want to <a href='%s'>log out</a>?"), wp_logout_url() );
1980	} else {
1981	$html = __( 'Are you sure you want to do this?' );
1982	if ( wp_get_referer() )
1983	$html .= "</p><p><a href='" . esc_url( remove_query_arg( 'updated', wp_get_referer() ) ) . "'>" . __( 'Please try again.' ) . "</a>";
1984	}
1985
1986	wp_die( $html, $title, array('response' => 403) );
1987	}
1988
1989	/**
1990	* Kill WordPress execution and display HTML message with error message.
1991	*
1992	* This function complements the die() PHP function. The difference is that
1993	* HTML will be displayed to the user. It is recommended to use this function
1994	* only, when the execution should not continue any further. It is not
1995	* recommended to call this function very often and try to handle as many errors
1996	* as possible silently.
1997	*
1998	* @since 2.0.4
1999	*
2000	* @param string $message Error message.
2001	* @param string $title Error title.
2002	* @param string\|array $args Optional arguments to control behavior.
2003	*/
2004	function wp_die( $message = '', $title = '', $args = array() ) {
2005	if ( defined( 'DOING_AJAX' ) && DOING_AJAX )
2006	$function = apply_filters( 'wp_die_ajax_handler', '_ajax_wp_die_handler' );
2007	elseif ( defined( 'XMLRPC_REQUEST' ) && XMLRPC_REQUEST )
2008	$function = apply_filters( 'wp_die_xmlrpc_handler', '_xmlrpc_wp_die_handler' );
2009	else
2010	$function = apply_filters( 'wp_die_handler', '_default_wp_die_handler' );
2011
2012	call_user_func( $function, $message, $title, $args );
2013	}
2014
2015	/**
2016	* Kill WordPress execution and display HTML message with error message.
2017	*
2018	* This is the default handler for wp_die if you want a custom one for your
2019	* site then you can overload using the wp_die_handler filter in wp_die
2020	*
2021	* @since 3.0.0
2022	* @access private
2023	*
2024	* @param string $message Error message.
2025	* @param string $title Error title.
2026	* @param string\|array $args Optional arguments to control behavior.
2027	*/
2028	function _default_wp_die_handler( $message, $title = '', $args = array() ) {
2029	$defaults = array( 'response' => 500 );
2030	$r = wp_parse_args($args, $defaults);
2031
2032	$have_gettext = function_exists('__');
2033
2034	if ( function_exists( 'is_wp_error' ) && is_wp_error( $message ) ) {
2035	if ( empty( $title ) ) {
2036	$error_data = $message->get_error_data();
2037	if ( is_array( $error_data ) && isset( $error_data['title'] ) )
2038	$title = $error_data['title'];
2039	}
2040	$errors = $message->get_error_messages();
2041	switch ( count( $errors ) ) :
2042	case 0 :
2043	$message = '';
2044	break;
2045	case 1 :
2046	$message = "<p>{$errors[0]}</p>";
2047	break;
2048	default :
2049	$message = "<ul>\n\t\t<li>" . join( "</li>\n\t\t<li>", $errors ) . "</li>\n\t</ul>";
2050	break;
2051	endswitch;
2052	} elseif ( is_string( $message ) ) {
2053	$message = "<p>$message</p>";
2054	}
2055
2056	if ( isset( $r['back_link'] ) && $r['back_link'] ) {
2057	$back_text = $have_gettext? __('« Back') : '« Back';
2058	$message .= "\n<p><a href='javascript:history.back()'>$back_text</a></p>";
2059	}
2060
2061	if ( ! did_action( 'admin_head' ) ) :
2062	if ( !headers_sent() ) {
2063	status_header( $r['response'] );
2064	nocache_headers();
2065	header( 'Content-Type: text/html; charset=utf-8' );
2066	}
2067
2068	if ( empty($title) )
2069	$title = $have_gettext ? __('WordPress &rsaquo; Error') : 'WordPress &rsaquo; Error';
2070
2071	$text_direction = 'ltr';
2072	if ( isset($r['text_direction']) && 'rtl' == $r['text_direction'] )
2073	$text_direction = 'rtl';
2074	elseif ( function_exists( 'is_rtl' ) && is_rtl() )
2075	$text_direction = 'rtl';
2076	?>
2077	<!DOCTYPE html>
2078	<!-- Ticket #11289, IE bug fix: always pad the error page with enough characters such that it is greater than 512 bytes, even after gzip compression abcdefghijklmnopqrstuvwxyz1234567890aabbccddeeffgghhiijjkkllmmnnooppqqrrssttuuvvwwxxyyzz11223344556677889900abacbcbdcdcededfefegfgfhghgihihjijikjkjlklkmlmlnmnmononpopoqpqprqrqsrsrtstsubcbcdcdedefefgfabcadefbghicjkldmnoepqrfstugvwxhyz1i234j567k890laabmbccnddeoeffpgghqhiirjjksklltmmnunoovppqwqrrxsstytuuzvvw0wxx1yyz2z113223434455666777889890091abc2def3ghi4jkl5mno6pqr7stu8vwx9yz11aab2bcc3dd4ee5ff6gg7hh8ii9j0jk1kl2lmm3nnoo4p5pq6qrr7ss8tt9uuvv0wwx1x2yyzz13aba4cbcb5dcdc6dedfef8egf9gfh0ghg1ihi2hji3jik4jkj5lkl6kml7mln8mnm9ono
2079	-->
2080	<html xmlns="http://www.w3.org/1999/xhtml" <?php if ( function_exists( 'language_attributes' ) && function_exists( 'is_rtl' ) ) language_attributes(); else echo "dir='$text_direction'"; ?>>
2081	<head>
2082	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
2083	<title><?php echo $title ?></title>
2084	<style type="text/css">
2085	html {
2086	background: #f9f9f9;
2087	}
2088	body {
2089	background: #fff;
2090	color: #333;
2091	font-family: sans-serif;
2092	margin: 2em auto;
2093	padding: 1em 2em;
2094	-webkit-border-radius: 3px;
2095	border-radius: 3px;
2096	border: 1px solid #dfdfdf;
2097	max-width: 700px;
2098	}
2099	h1 {
2100	border-bottom: 1px solid #dadada;
2101	clear: both;
2102	color: #666;
2103	font: 24px Georgia, "Times New Roman", Times, serif;
2104	margin: 30px 0 0 0;
2105	padding: 0;
2106	padding-bottom: 7px;
2107	}
2108	#error-page {
2109	margin-top: 50px;
2110	}
2111	#error-page p {
2112	font-size: 14px;
2113	line-height: 1.5;
2114	margin: 25px 0 20px;
2115	}
2116	#error-page code {
2117	font-family: Consolas, Monaco, monospace;
2118	}
2119	ul li {
2120	margin-bottom: 10px;
2121	font-size: 14px ;
2122	}
2123	a {
2124	color: #21759B;
2125	text-decoration: none;
2126	}
2127	a:hover {
2128	color: #D54E21;
2129	}
2130	.button {
2131	display: inline-block;
2132	text-decoration: none;
2133	font-size: 14px;
2134	line-height: 23px;
2135	height: 24px;
2136	margin: 0;
2137	padding: 0 10px 1px;
2138	cursor: pointer;
2139	border-width: 1px;
2140	border-style: solid;
2141	-webkit-border-radius: 3px;
2142	border-radius: 3px;
2143	white-space: nowrap;
2144	-webkit-box-sizing: border-box;
2145	-moz-box-sizing: border-box;
2146	box-sizing: border-box;
2147	background: #f3f3f3;
2148	background-image: -webkit-gradient(linear, left top, left bottom, from(#fefefe), to(#f4f4f4));
2149	background-image: -webkit-linear-gradient(top, #fefefe, #f4f4f4);
2150	background-image: -moz-linear-gradient(top, #fefefe, #f4f4f4);
2151	background-image: -o-linear-gradient(top, #fefefe, #f4f4f4);
2152	background-image: linear-gradient(to bottom, #fefefe, #f4f4f4);
2153	border-color: #bbb;
2154	color: #333;
2155	text-shadow: 0 1px 0 #fff;
2156	}
2157
2158	.button.button-large {
2159	height: 29px;
2160	line-height: 28px;
2161	padding: 0 12px;
2162	}
2163
2164	.button:hover,
2165	.button:focus {
2166	background: #f3f3f3;
2167	background-image: -webkit-gradient(linear, left top, left bottom, from(#fff), to(#f3f3f3));
2168	background-image: -webkit-linear-gradient(top, #fff, #f3f3f3);
2169	background-image: -moz-linear-gradient(top, #fff, #f3f3f3);
2170	background-image: -ms-linear-gradient(top, #fff, #f3f3f3);
2171	background-image: -o-linear-gradient(top, #fff, #f3f3f3);
2172	background-image: linear-gradient(to bottom, #fff, #f3f3f3);
2173	border-color: #999;
2174	color: #222;
2175	}
2176
2177	.button:focus {
2178	-webkit-box-shadow: 1px 1px 1px rgba(0,0,0,.2);
2179	box-shadow: 1px 1px 1px rgba(0,0,0,.2);
2180	}
2181
2182	.button:active {
2183	outline: none;
2184	background: #eee;
2185	background-image: -webkit-gradient(linear, left top, left bottom, from(#f4f4f4), to(#fefefe));
2186	background-image: -webkit-linear-gradient(top, #f4f4f4, #fefefe);
2187	background-image: -moz-linear-gradient(top, #f4f4f4, #fefefe);
2188	background-image: -ms-linear-gradient(top, #f4f4f4, #fefefe);
2189	background-image: -o-linear-gradient(top, #f4f4f4, #fefefe);
2190	background-image: linear-gradient(to bottom, #f4f4f4, #fefefe);
2191	border-color: #999;
2192	color: #333;
2193	text-shadow: 0 -1px 0 #fff;
2194	-webkit-box-shadow: inset 0 2px 5px -3px rgba( 0, 0, 0, 0.5 );
2195	box-shadow: inset 0 2px 5px -3px rgba( 0, 0, 0, 0.5 );
2196	}
2197
2198	<?php if ( 'rtl' == $text_direction ) : ?>
2199	body { font-family: Tahoma, Arial; }
2200	<?php endif; ?>
2201	</style>
2202	</head>
2203	<body id="error-page">
2204	<?php endif; // ! did_action( 'admin_head' ) ?>
2205	<?php echo $message; ?>
2206	</body>
2207	</html>
2208	<?php
2209	die();
2210	}
2211
2212	/**
2213	* Kill WordPress execution and display XML message with error message.
2214	*
2215	* This is the handler for wp_die when processing XMLRPC requests.
2216	*
2217	* @since 3.2.0
2218	* @access private
2219	*
2220	* @param string $message Error message.
2221	* @param string $title Error title.
2222	* @param string\|array $args Optional arguments to control behavior.
2223	*/
2224	function _xmlrpc_wp_die_handler( $message, $title = '', $args = array() ) {
2225	global $wp_xmlrpc_server;
2226	$defaults = array( 'response' => 500 );
2227
2228	$r = wp_parse_args($args, $defaults);
2229
2230	if ( $wp_xmlrpc_server ) {
2231	$error = new IXR_Error( $r['response'] , $message);
2232	$wp_xmlrpc_server->output( $error->getXml() );
2233	}
2234	die();
2235	}
2236
2237	/**
2238	* Kill WordPress ajax execution.
2239	*
2240	* This is the handler for wp_die when processing Ajax requests.
2241	*
2242	* @since 3.4.0
2243	* @access private
2244	*
2245	* @param string $message Optional. Response to print.
2246	*/
2247	function _ajax_wp_die_handler( $message = '' ) {
2248	if ( is_scalar( $message ) )
2249	die( (string) $message );
2250	die( '0' );
2251	}
2252
2253	/**
2254	* Kill WordPress execution.
2255	*
2256	* This is the handler for wp_die when processing APP requests.
2257	*
2258	* @since 3.4.0
2259	* @access private
2260	*
2261	* @param string $message Optional. Response to print.
2262	*/
2263	function _scalar_wp_die_handler( $message = '' ) {
2264	if ( is_scalar( $message ) )
2265	die( (string) $message );
2266	die();
2267	}
2268
2269	/**
2270	* Send a JSON response back to an Ajax request.
2271	*
2272	* @since 3.5.0
2273	*
2274	* @param mixed $response Variable (usually an array or object) to encode as JSON, then print and die.
2275	*/
2276	function wp_send_json( $response ) {
2277	@header( 'Content-Type: application/json; charset=' . get_option( 'blog_charset' ) );
2278	echo json_encode( $response );
2279	if ( defined( 'DOING_AJAX' ) && DOING_AJAX )
2280	wp_die();
2281	else
2282	die;
2283	}
2284
2285	/**
2286	* Send a JSON response back to an Ajax request, indicating success.
2287	*
2288	* @since 3.5.0
2289	*
2290	* @param mixed $data Data to encode as JSON, then print and die.
2291	*/
2292	function wp_send_json_success( $data = null ) {
2293	$response = array( 'success' => true );
2294
2295	if ( isset( $data ) )
2296	$response['data'] = $data;
2297
2298	wp_send_json( $response );
2299	}
2300
2301	/**
2302	* Send a JSON response back to an Ajax request, indicating failure.
2303	*
2304	* @since 3.5.0
2305	*
2306	* @param mixed $data Data to encode as JSON, then print and die.
2307	*/
2308	function wp_send_json_error( $data = null ) {
2309	$response = array( 'success' => false );
2310
2311	if ( isset( $data ) )
2312	$response['data'] = $data;
2313
2314	wp_send_json( $response );
2315	}
2316
2317	/**
2318	* Retrieve the WordPress home page URL.
2319	*
2320	* If the constant named 'WP_HOME' exists, then it will be used and returned by
2321	* the function. This can be used to counter the redirection on your local
2322	* development environment.
2323	*
2324	* @access private
2325	* @package WordPress
2326	* @since 2.2.0
2327	*
2328	* @param string $url URL for the home location
2329	* @return string Homepage location.
2330	*/
2331	function _config_wp_home( $url = '' ) {
2332	if ( defined( 'WP_HOME' ) )
2333	return untrailingslashit( WP_HOME );
2334	return $url;
2335	}
2336
2337	/**
2338	* Retrieve the WordPress site URL.
2339	*
2340	* If the constant named 'WP_SITEURL' is defined, then the value in that
2341	* constant will always be returned. This can be used for debugging a site on
2342	* your localhost while not having to change the database to your URL.
2343	*
2344	* @access private
2345	* @package WordPress
2346	* @since 2.2.0
2347	*
2348	* @param string $url URL to set the WordPress site location.
2349	* @return string The WordPress Site URL
2350	*/
2351	function _config_wp_siteurl( $url = '' ) {
2352	if ( defined( 'WP_SITEURL' ) )
2353	return untrailingslashit( WP_SITEURL );
2354	return $url;
2355	}
2356
2357	/**
2358	* Set the localized direction for MCE plugin.
2359	*
2360	* Will only set the direction to 'rtl', if the WordPress locale has the text
2361	* direction set to 'rtl'.
2362	*
2363	* Fills in the 'directionality', 'plugins', and 'theme_advanced_button1' array
2364	* keys. These keys are then returned in the $input array.
2365	*
2366	* @access private
2367	* @package WordPress
2368	* @subpackage MCE
2369	* @since 2.1.0
2370	*
2371	* @param array $input MCE plugin array.
2372	* @return array Direction set for 'rtl', if needed by locale.
2373	*/
2374	function _mce_set_direction( $input ) {
2375	if ( is_rtl() ) {
2376	$input['directionality'] = 'rtl';
2377	$input['plugins'] .= ',directionality';
2378	$input['theme_advanced_buttons1'] .= ',ltr';
2379	}
2380
2381	return $input;
2382	}
2383
2384	/**
2385	* Convert smiley code to the icon graphic file equivalent.
2386	*
2387	* You can turn off smilies, by going to the write setting screen and unchecking
2388	* the box, or by setting 'use_smilies' option to false or removing the option.
2389	*
2390	* Plugins may override the default smiley list by setting the $wpsmiliestrans
2391	* to an array, with the key the code the blogger types in and the value the
2392	* image file.
2393	*
2394	* The $wp_smiliessearch global is for the regular expression and is set each
2395	* time the function is called.
2396	*
2397	* The full list of smilies can be found in the function and won't be listed in
2398	* the description. Probably should create a Codex page for it, so that it is
2399	* available.
2400	*
2401	* @global array $wpsmiliestrans
2402	* @global array $wp_smiliessearch
2403	* @since 2.2.0
2404	*/
2405	function smilies_init() {
2406	global $wpsmiliestrans, $wp_smiliessearch;
2407
2408	// don't bother setting up smilies if they are disabled
2409	if ( !get_option( 'use_smilies' ) )
2410	return;
2411
2412	if ( !isset( $wpsmiliestrans ) ) {
2413	$wpsmiliestrans = array(
2414	':mrgreen:' => 'icon_mrgreen.gif',
2415	':neutral:' => 'icon_neutral.gif',
2416	':twisted:' => 'icon_twisted.gif',
2417	':arrow:' => 'icon_arrow.gif',
2418	':shock:' => 'icon_eek.gif',
2419	':smile:' => 'icon_smile.gif',
2420	':???:' => 'icon_confused.gif',
2421	':cool:' => 'icon_cool.gif',
2422	':evil:' => 'icon_evil.gif',
2423	':grin:' => 'icon_biggrin.gif',
2424	':idea:' => 'icon_idea.gif',
2425	':oops:' => 'icon_redface.gif',
2426	':razz:' => 'icon_razz.gif',
2427	':roll:' => 'icon_rolleyes.gif',
2428	':wink:' => 'icon_wink.gif',
2429	':cry:' => 'icon_cry.gif',
2430	':eek:' => 'icon_surprised.gif',
2431	':lol:' => 'icon_lol.gif',
2432	':mad:' => 'icon_mad.gif',
2433	':sad:' => 'icon_sad.gif',
2434	'8-)' => 'icon_cool.gif',
2435	'8-O' => 'icon_eek.gif',
2436	':-(' => 'icon_sad.gif',
2437	':-)' => 'icon_smile.gif',
2438	':-?' => 'icon_confused.gif',
2439	':-D' => 'icon_biggrin.gif',
2440	':-P' => 'icon_razz.gif',
2441	':-o' => 'icon_surprised.gif',
2442	':-x' => 'icon_mad.gif',
2443	':-\|' => 'icon_neutral.gif',
2444	';-)' => 'icon_wink.gif',
2445	// This one transformation breaks regular text with frequency.
2446	// '8)' => 'icon_cool.gif',
2447	'8O' => 'icon_eek.gif',
2448	':(' => 'icon_sad.gif',
2449	':)' => 'icon_smile.gif',
2450	':?' => 'icon_confused.gif',
2451	':D' => 'icon_biggrin.gif',
2452	':P' => 'icon_razz.gif',
2453	':o' => 'icon_surprised.gif',
2454	':x' => 'icon_mad.gif',
2455	':\|' => 'icon_neutral.gif',
2456	';)' => 'icon_wink.gif',
2457	':!:' => 'icon_exclaim.gif',
2458	':?:' => 'icon_question.gif',
2459	);
2460	}
2461
2462	if (count($wpsmiliestrans) == 0) {
2463	return;
2464	}
2465
2466	/*
2467	* NOTE: we sort the smilies in reverse key order. This is to make sure
2468	* we match the longest possible smilie (:???: vs :?) as the regular
2469	* expression used below is first-match
2470	*/
2471	krsort($wpsmiliestrans);
2472
2473	$wp_smiliessearch = '/(?:\s\|^)';
2474
2475	$subchar = '';
2476	foreach ( (array) $wpsmiliestrans as $smiley => $img ) {
2477	$firstchar = substr($smiley, 0, 1);
2478	$rest = substr($smiley, 1);
2479
2480	// new subpattern?
2481	if ($firstchar != $subchar) {
2482	if ($subchar != '') {
2483	$wp_smiliessearch .= ')\|(?:\s\|^)';
2484	}
2485	$subchar = $firstchar;
2486	$wp_smiliessearch .= preg_quote($firstchar, '/') . '(?:';
2487	} else {
2488	$wp_smiliessearch .= '\|';
2489	}
2490	$wp_smiliessearch .= preg_quote($rest, '/');
2491	}
2492
2493	$wp_smiliessearch .= ')(?:\s\|$)/m';
2494	}
2495
2496	/**
2497	* Merge user defined arguments into defaults array.
2498	*
2499	* This function is used throughout WordPress to allow for both string or array
2500	* to be merged into another array.
2501	*
2502	* @since 2.2.0
2503	*
2504	* @param string\|array $args Value to merge with $defaults
2505	* @param array $defaults Array that serves as the defaults.
2506	* @return array Merged user defined values with defaults.
2507	*/
2508	function wp_parse_args( $args, $defaults = '' ) {
2509	if ( is_object( $args ) )
2510	$r = get_object_vars( $args );
2511	elseif ( is_array( $args ) )
2512	$r =& $args;
2513	else
2514	wp_parse_str( $args, $r );
2515
2516	if ( is_array( $defaults ) )
2517	return array_merge( $defaults, $r );
2518	return $r;
2519	}
2520
2521	/**
2522	* Clean up an array, comma- or space-separated list of IDs.
2523	*
2524	* @since 3.0.0
2525	*
2526	* @param array\|string $list
2527	* @return array Sanitized array of IDs
2528	*/
2529	function wp_parse_id_list( $list ) {
2530	if ( !is_array($list) )
2531	$list = preg_split('/[\s,]+/', $list);
2532
2533	return array_unique(array_map('absint', $list));
2534	}
2535
2536	/**
2537	* Extract a slice of an array, given a list of keys.
2538	*
2539	* @since 3.1.0
2540	*
2541	* @param array $array The original array
2542	* @param array $keys The list of keys
2543	* @return array The array slice
2544	*/
2545	function wp_array_slice_assoc( $array, $keys ) {
2546	$slice = array();
2547	foreach ( $keys as $key )
2548	if ( isset( $array[ $key ] ) )
2549	$slice[ $key ] = $array[ $key ];
2550
2551	return $slice;
2552	}
2553
2554	/**
2555	* Filters a list of objects, based on a set of key => value arguments.
2556	*
2557	* @since 3.0.0
2558	*
2559	* @param array $list An array of objects to filter
2560	* @param array $args An array of key => value arguments to match against each object
2561	* @param string $operator The logical operation to perform. 'or' means only one element
2562	* from the array needs to match; 'and' means all elements must match. The default is 'and'.
2563	* @param bool\|string $field A field from the object to place instead of the entire object
2564	* @return array A list of objects or object fields
2565	*/
2566	function wp_filter_object_list( $list, $args = array(), $operator = 'and', $field = false ) {
2567	if ( ! is_array( $list ) )
2568	return array();
2569
2570	$list = wp_list_filter( $list, $args, $operator );
2571
2572	if ( $field )
2573	$list = wp_list_pluck( $list, $field );
2574
2575	return $list;
2576	}
2577
2578	/**
2579	* Filters a list of objects, based on a set of key => value arguments.
2580	*
2581	* @since 3.1.0
2582	*
2583	* @param array $list An array of objects to filter
2584	* @param array $args An array of key => value arguments to match against each object
2585	* @param string $operator The logical operation to perform:
2586	* 'AND' means all elements from the array must match;
2587	* 'OR' means only one element needs to match;
2588	* 'NOT' means no elements may match.
2589	* The default is 'AND'.
2590	* @return array
2591	*/
2592	function wp_list_filter( $list, $args = array(), $operator = 'AND' ) {
2593	if ( ! is_array( $list ) )
2594	return array();
2595
2596	if ( empty( $args ) )
2597	return $list;
2598
2599	$operator = strtoupper( $operator );
2600	$count = count( $args );
2601	$filtered = array();
2602
2603	foreach ( $list as $key => $obj ) {
2604	$to_match = (array) $obj;
2605
2606	$matched = 0;
2607	foreach ( $args as $m_key => $m_value ) {
2608	if ( array_key_exists( $m_key, $to_match ) && $m_value == $to_match[ $m_key ] )
2609	$matched++;
2610	}
2611
2612	if ( ( 'AND' == $operator && $matched == $count )
2613	\|\| ( 'OR' == $operator && $matched > 0 )
2614	\|\| ( 'NOT' == $operator && 0 == $matched ) ) {
2615	$filtered[$key] = $obj;
2616	}
2617	}
2618
2619	return $filtered;
2620	}
2621
2622	/**
2623	* Pluck a certain field out of each object in a list.
2624	*
2625	* @since 3.1.0
2626	*
2627	* @param array $list A list of objects or arrays
2628	* @param int\|string $field A field from the object to place instead of the entire object
2629	* @return array
2630	*/
2631	function wp_list_pluck( $list, $field ) {
2632	foreach ( $list as $key => $value ) {
2633	if ( is_object( $value ) )
2634	$list[ $key ] = $value->$field;
2635	else
2636	$list[ $key ] = $value[ $field ];
2637	}
2638
2639	return $list;
2640	}
2641
2642	/**
2643	* Determines if Widgets library should be loaded.
2644	*
2645	* Checks to make sure that the widgets library hasn't already been loaded. If
2646	* it hasn't, then it will load the widgets library and run an action hook.
2647	*
2648	* @since 2.2.0
2649	* @uses add_action() Calls '_admin_menu' hook with 'wp_widgets_add_menu' value.
2650	*/
2651	function wp_maybe_load_widgets() {
2652	if ( ! apply_filters('load_default_widgets', true) )
2653	return;
2654	require_once( ABSPATH . WPINC . '/default-widgets.php' );
2655	add_action( '_admin_menu', 'wp_widgets_add_menu' );
2656	}
2657
2658	/**
2659	* Append the Widgets menu to the themes main menu.
2660	*
2661	* @since 2.2.0
2662	* @uses $submenu The administration submenu list.
2663	*/
2664	function wp_widgets_add_menu() {
2665	global $submenu;
2666
2667	if ( ! current_theme_supports( 'widgets' ) )
2668	return;
2669
2670	$submenu['themes.php'][7] = array( __( 'Widgets' ), 'edit_theme_options', 'widgets.php' );
2671	ksort( $submenu['themes.php'], SORT_NUMERIC );
2672	}
2673
2674	/**
2675	* Flush all output buffers for PHP 5.2.
2676	*
2677	* Make sure all output buffers are flushed before our singletons our destroyed.
2678	*
2679	* @since 2.2.0
2680	*/
2681	function wp_ob_end_flush_all() {
2682	$levels = ob_get_level();
2683	for ($i=0; $i<$levels; $i++)
2684	ob_end_flush();
2685	}
2686
2687	/**
2688	* Load custom DB error or display WordPress DB error.
2689	*
2690	* If a file exists in the wp-content directory named db-error.php, then it will
2691	* be loaded instead of displaying the WordPress DB error. If it is not found,
2692	* then the WordPress DB error will be displayed instead.
2693	*
2694	* The WordPress DB error sets the HTTP status header to 500 to try to prevent
2695	* search engines from caching the message. Custom DB messages should do the
2696	* same.
2697	*
2698	* This function was backported to the the WordPress 2.3.2, but originally was
2699	* added in WordPress 2.5.0.
2700	*
2701	* @since 2.3.2
2702	* @uses $wpdb
2703	*/
2704	function dead_db() {
2705	global $wpdb;
2706
2707	// Load custom DB error template, if present.
2708	if ( file_exists( WP_CONTENT_DIR . '/db-error.php' ) ) {
2709	require_once( WP_CONTENT_DIR . '/db-error.php' );
2710	die();
2711	}
2712
2713	// If installing or in the admin, provide the verbose message.
2714	if ( defined('WP_INSTALLING') \|\| defined('WP_ADMIN') )
2715	wp_die($wpdb->error);
2716
2717	// Otherwise, be terse.
2718	status_header( 500 );
2719	nocache_headers();
2720	header( 'Content-Type: text/html; charset=utf-8' );
2721
2722	wp_load_translations_early();
2723	?>
2724	<!DOCTYPE html>
2725	<html xmlns="http://www.w3.org/1999/xhtml"<?php if ( is_rtl() ) echo ' dir="rtl"'; ?>>
2726	<head>
2727	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
2728	<title><?php _e( 'Database Error' ); ?></title>
2729
2730	</head>
2731	<body>
2732	<h1><?php _e( 'Error establishing a database connection' ); ?></h1>
2733	</body>
2734	</html>
2735	<?php
2736	die();
2737	}
2738
2739	/**
2740	* Converts value to nonnegative integer.
2741	*
2742	* @since 2.5.0
2743	*
2744	* @param mixed $maybeint Data you wish to have converted to a nonnegative integer
2745	* @return int An nonnegative integer
2746	*/
2747	function absint( $maybeint ) {
2748	return abs( intval( $maybeint ) );
2749	}
2750
2751	/**
2752	* Determines if the blog can be accessed over SSL.
2753	*
2754	* Determines if blog can be accessed over SSL by using cURL to access the site
2755	* using the https in the siteurl. Requires cURL extension to work correctly.
2756	*
2757	* @since 2.5.0
2758	*
2759	* @param string $url
2760	* @return bool Whether SSL access is available
2761	*/
2762	function url_is_accessable_via_ssl($url)
2763	{
2764	if ( in_array( 'curl', get_loaded_extensions() ) ) {
2765	$ssl = set_url_scheme( $url, 'https' );
2766
2767	$ch = curl_init();
2768	curl_setopt($ch, CURLOPT_URL, $ssl);
2769	curl_setopt($ch, CURLOPT_FAILONERROR, true);
2770	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
2771	curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
2772	curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
2773
2774	curl_exec($ch);
2775
2776	$status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
2777	curl_close ($ch);
2778
2779	if ($status == 200 \|\| $status == 401) {
2780	return true;
2781	}
2782	}
2783	return false;
2784	}
2785
2786	/**
2787	* Marks a function as deprecated and informs when it has been used.
2788	*
2789	* There is a hook deprecated_function_run that will be called that can be used
2790	* to get the backtrace up to what file and function called the deprecated
2791	* function.
2792	*
2793	* The current behavior is to trigger a user error if WP_DEBUG is true.
2794	*
2795	* This function is to be used in every function that is deprecated.
2796	*
2797	* @package WordPress
2798	* @subpackage Debug
2799	* @since 2.5.0
2800	* @access private
2801	*
2802	* @uses do_action() Calls 'deprecated_function_run' and passes the function name, what to use instead,
2803	* and the version the function was deprecated in.
2804	* @uses apply_filters() Calls 'deprecated_function_trigger_error' and expects boolean value of true to do
2805	* trigger or false to not trigger error.
2806	*
2807	* @param string $function The function that was called
2808	* @param string $version The version of WordPress that deprecated the function
2809	* @param string $replacement Optional. The function that should have been called
2810	*/
2811	function _deprecated_function( $function, $version, $replacement = null ) {
2812
2813	do_action( 'deprecated_function_run', $function, $replacement, $version );
2814
2815	// Allow plugin to filter the output error trigger
2816	if ( WP_DEBUG && apply_filters( 'deprecated_function_trigger_error', true ) ) {
2817	if ( ! is_null($replacement) )
2818	trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.'), $function, $version, $replacement ) );
2819	else
2820	trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.'), $function, $version ) );
2821	}
2822	}
2823
2824	/**
2825	* Marks a file as deprecated and informs when it has been used.
2826	*
2827	* There is a hook deprecated_file_included that will be called that can be used
2828	* to get the backtrace up to what file and function included the deprecated
2829	* file.
2830	*
2831	* The current behavior is to trigger a user error if WP_DEBUG is true.
2832	*
2833	* This function is to be used in every file that is deprecated.
2834	*
2835	* @package WordPress
2836	* @subpackage Debug
2837	* @since 2.5.0
2838	* @access private
2839	*
2840	* @uses do_action() Calls 'deprecated_file_included' and passes the file name, what to use instead,
2841	* the version in which the file was deprecated, and any message regarding the change.
2842	* @uses apply_filters() Calls 'deprecated_file_trigger_error' and expects boolean value of true to do
2843	* trigger or false to not trigger error.
2844	*
2845	* @param string $file The file that was included
2846	* @param string $version The version of WordPress that deprecated the file
2847	* @param string $replacement Optional. The file that should have been included based on ABSPATH
2848	* @param string $message Optional. A message regarding the change
2849	*/
2850	function _deprecated_file( $file, $version, $replacement = null, $message = '' ) {
2851
2852	do_action( 'deprecated_file_included', $file, $replacement, $version, $message );
2853
2854	// Allow plugin to filter the output error trigger
2855	if ( WP_DEBUG && apply_filters( 'deprecated_file_trigger_error', true ) ) {
2856	$message = empty( $message ) ? '' : ' ' . $message;
2857	if ( ! is_null( $replacement ) )
2858	trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.'), $file, $version, $replacement ) . $message );
2859	else
2860	trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.'), $file, $version ) . $message );
2861	}
2862	}
2863	/**
2864	* Marks a function argument as deprecated and informs when it has been used.
2865	*
2866	* This function is to be used whenever a deprecated function argument is used.
2867	* Before this function is called, the argument must be checked for whether it was
2868	* used by comparing it to its default value or evaluating whether it is empty.
2869	* For example:
2870	* <code>
2871	* if ( !empty($deprecated) )
2872	* _deprecated_argument( __FUNCTION__, '3.0' );
2873	* </code>
2874	*
2875	* There is a hook deprecated_argument_run that will be called that can be used
2876	* to get the backtrace up to what file and function used the deprecated
2877	* argument.
2878	*
2879	* The current behavior is to trigger a user error if WP_DEBUG is true.
2880	*
2881	* @package WordPress
2882	* @subpackage Debug
2883	* @since 3.0.0
2884	* @access private
2885	*
2886	* @uses do_action() Calls 'deprecated_argument_run' and passes the function name, a message on the change,
2887	* and the version in which the argument was deprecated.
2888	* @uses apply_filters() Calls 'deprecated_argument_trigger_error' and expects boolean value of true to do
2889	* trigger or false to not trigger error.
2890	*
2891	* @param string $function The function that was called
2892	* @param string $version The version of WordPress that deprecated the argument used
2893	* @param string $message Optional. A message regarding the change.
2894	*/
2895	function _deprecated_argument( $function, $version, $message = null ) {
2896
2897	do_action( 'deprecated_argument_run', $function, $message, $version );
2898
2899	// Allow plugin to filter the output error trigger
2900	if ( WP_DEBUG && apply_filters( 'deprecated_argument_trigger_error', true ) ) {
2901	if ( ! is_null( $message ) )
2902	trigger_error( sprintf( __('%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s! %3$s'), $function, $version, $message ) );
2903	else
2904	trigger_error( sprintf( __('%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s with no alternative available.'), $function, $version ) );
2905	}
2906	}
2907
2908	/**
2909	* Marks something as being incorrectly called.
2910	*
2911	* There is a hook doing_it_wrong_run that will be called that can be used
2912	* to get the backtrace up to what file and function called the deprecated
2913	* function.
2914	*
2915	* The current behavior is to trigger a user error if WP_DEBUG is true.
2916	*
2917	* @package WordPress
2918	* @subpackage Debug
2919	* @since 3.1.0
2920	* @access private
2921	*
2922	* @uses do_action() Calls 'doing_it_wrong_run' and passes the function arguments.
2923	* @uses apply_filters() Calls 'doing_it_wrong_trigger_error' and expects boolean value of true to do
2924	* trigger or false to not trigger error.
2925	*
2926	* @param string $function The function that was called.
2927	* @param string $message A message explaining what has been done incorrectly.
2928	* @param string $version The version of WordPress where the message was added.
2929	*/
2930	function _doing_it_wrong( $function, $message, $version ) {
2931
2932	do_action( 'doing_it_wrong_run', $function, $message, $version );
2933
2934	// Allow plugin to filter the output error trigger
2935	if ( WP_DEBUG && apply_filters( 'doing_it_wrong_trigger_error', true ) ) {
2936	$version = is_null( $version ) ? '' : sprintf( __( '(This message was added in version %s.)' ), $version );
2937	$message .= ' ' . __( 'Please see <a href="http://codex.wordpress.org/Debugging_in_WordPress">Debugging in WordPress</a> for more information.' );
2938	trigger_error( sprintf( __( '%1$s was called <strong>incorrectly</strong>. %2$s %3$s' ), $function, $message, $version ) );
2939	}
2940	}
2941
2942	/**
2943	* Is the server running earlier than 1.5.0 version of lighttpd?
2944	*
2945	* @since 2.5.0
2946	*
2947	* @return bool Whether the server is running lighttpd < 1.5.0
2948	*/
2949	function is_lighttpd_before_150() {
2950	$server_parts = explode( '/', isset( $_SERVER['SERVER_SOFTWARE'] )? $_SERVER['SERVER_SOFTWARE'] : '' );
2951	$server_parts[1] = isset( $server_parts[1] )? $server_parts[1] : '';
2952	return 'lighttpd' == $server_parts[0] && -1 == version_compare( $server_parts[1], '1.5.0' );
2953	}
2954
2955	/**
2956	* Does the specified module exist in the Apache config?
2957	*
2958	* @since 2.5.0
2959	*
2960	* @param string $mod e.g. mod_rewrite
2961	* @param bool $default The default return value if the module is not found
2962	* @return bool
2963	*/
2964	function apache_mod_loaded($mod, $default = false) {
2965	global $is_apache;
2966
2967	if ( !$is_apache )
2968	return false;
2969
2970	if ( function_exists('apache_get_modules') ) {
2971	$mods = apache_get_modules();
2972	if ( in_array($mod, $mods) )
2973	return true;
2974	} elseif ( function_exists('phpinfo') ) {
2975	ob_start();
2976	phpinfo(8);
2977	$phpinfo = ob_get_clean();
2978	if ( false !== strpos($phpinfo, $mod) )
2979	return true;
2980	}
2981	return $default;
2982	}
2983
2984	/**
2985	* Check if IIS 7 supports pretty permalinks.
2986	*
2987	* @since 2.8.0
2988	*
2989	* @return bool
2990	*/
2991	function iis7_supports_permalinks() {
2992	global $is_iis7;
2993
2994	$supports_permalinks = false;
2995	if ( $is_iis7 ) {
2996	/* First we check if the DOMDocument class exists. If it does not exist,
2997	* which is the case for PHP 4.X, then we cannot easily update the xml configuration file,
2998	* hence we just bail out and tell user that pretty permalinks cannot be used.
2999	* This is not a big issue because PHP 4.X is going to be deprecated and for IIS it
3000	* is recommended to use PHP 5.X NTS.
3001	* Next we check if the URL Rewrite Module 1.1 is loaded and enabled for the web site. When
3002	* URL Rewrite 1.1 is loaded it always sets a server variable called 'IIS_UrlRewriteModule'.
3003	* Lastly we make sure that PHP is running via FastCGI. This is important because if it runs
3004	* via ISAPI then pretty permalinks will not work.
3005	*/
3006	$supports_permalinks = class_exists('DOMDocument') && isset($_SERVER['IIS_UrlRewriteModule']) && ( php_sapi_name() == 'cgi-fcgi' );
3007	}
3008
3009	return apply_filters('iis7_supports_permalinks', $supports_permalinks);
3010	}
3011
3012	/**
3013	* File validates against allowed set of defined rules.
3014	*
3015	* A return value of '1' means that the $file contains either '..' or './'. A
3016	* return value of '2' means that the $file contains ':' after the first
3017	* character. A return value of '3' means that the file is not in the allowed
3018	* files list.
3019	*
3020	* @since 1.2.0
3021	*
3022	* @param string $file File path.
3023	* @param array $allowed_files List of allowed files.
3024	* @return int 0 means nothing is wrong, greater than 0 means something was wrong.
3025	*/
3026	function validate_file( $file, $allowed_files = '' ) {
3027	if ( false !== strpos( $file, '..' ) )
3028	return 1;
3029
3030	if ( false !== strpos( $file, './' ) )
3031	return 1;
3032
3033	if ( ! empty( $allowed_files ) && ! in_array( $file, $allowed_files ) )
3034	return 3;
3035
3036	if (':' == substr( $file, 1, 1 ) )
3037	return 2;
3038
3039	return 0;
3040	}
3041
3042	/**
3043	* Determine if SSL is used.
3044	*
3045	* @since 2.6.0
3046	*
3047	* @return bool True if SSL, false if not used.
3048	*/
3049	function is_ssl() {
3050	if ( isset($_SERVER['HTTPS']) ) {
3051	if ( 'on' == strtolower($_SERVER['HTTPS']) )
3052	return true;
3053	if ( '1' == $_SERVER['HTTPS'] )
3054	return true;
3055	} elseif ( isset($_SERVER['SERVER_PORT']) && ( '443' == $_SERVER['SERVER_PORT'] ) ) {
3056	return true;
3057	}
3058	return false;
3059	}
3060
3061	/**
3062	* Whether SSL login should be forced.
3063	*
3064	* @since 2.6.0
3065	*
3066	* @param string\|bool $force Optional.
3067	* @return bool True if forced, false if not forced.
3068	*/
3069	function force_ssl_login( $force = null ) {
3070	static $forced = false;
3071
3072	if ( !is_null( $force ) ) {
3073	$old_forced = $forced;
3074	$forced = $force;
3075	return $old_forced;
3076	}
3077
3078	return $forced;
3079	}
3080
3081	/**
3082	* Whether to force SSL used for the Administration Screens.
3083	*
3084	* @since 2.6.0
3085	*
3086	* @param string\|bool $force
3087	* @return bool True if forced, false if not forced.
3088	*/
3089	function force_ssl_admin( $force = null ) {
3090	static $forced = false;
3091
3092	if ( !is_null( $force ) ) {
3093	$old_forced = $forced;
3094	$forced = $force;
3095	return $old_forced;
3096	}
3097
3098	return $forced;
3099	}
3100
3101	/**
3102	* Guess the URL for the site.
3103	*
3104	* Will remove wp-admin links to retrieve only return URLs not in the wp-admin
3105	* directory.
3106	*
3107	* @since 2.6.0
3108	*
3109	* @return string
3110	*/
3111	function wp_guess_url() {
3112	if ( defined('WP_SITEURL') && '' != WP_SITEURL ) {
3113	$url = WP_SITEURL;
3114	} else {
3115	$schema = is_ssl() ? 'https://' : 'http://'; // set_url_scheme() is not defined yet
3116	$url = preg_replace( '#/(wp-admin/.*\|wp-login.php)#i', '', $schema . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
3117	}
3118
3119	return rtrim($url, '/');
3120	}
3121
3122	/**
3123	* Temporarily suspend cache additions.
3124	*
3125	* Stops more data being added to the cache, but still allows cache retrieval.
3126	* This is useful for actions, such as imports, when a lot of data would otherwise
3127	* be almost uselessly added to the cache.
3128	*
3129	* Suspension lasts for a single page load at most. Remember to call this
3130	* function again if you wish to re-enable cache adds earlier.
3131	*
3132	* @since 3.3.0
3133	*
3134	* @param bool $suspend Optional. Suspends additions if true, re-enables them if false.
3135	* @return bool The current suspend setting
3136	*/
3137	function wp_suspend_cache_addition( $suspend = null ) {
3138	static $_suspend = false;
3139
3140	if ( is_bool( $suspend ) )
3141	$_suspend = $suspend;
3142
3143	return $_suspend;
3144	}
3145
3146	/**
3147	* Suspend cache invalidation.
3148	*
3149	* Turns cache invalidation on and off. Useful during imports where you don't wont to do invalidations
3150	* every time a post is inserted. Callers must be sure that what they are doing won't lead to an inconsistent
3151	* cache when invalidation is suspended.
3152	*
3153	* @since 2.7.0
3154	*
3155	* @param bool $suspend Whether to suspend or enable cache invalidation
3156	* @return bool The current suspend setting
3157	*/
3158	function wp_suspend_cache_invalidation($suspend = true) {
3159	global $_wp_suspend_cache_invalidation;
3160
3161	$current_suspend = $_wp_suspend_cache_invalidation;
3162	$_wp_suspend_cache_invalidation = $suspend;
3163	return $current_suspend;
3164	}
3165
3166	/**
3167	* Is main site?
3168	*
3169	*
3170	* @since 3.0.0
3171	* @package WordPress
3172	*
3173	* @param int $blog_id optional blog id to test (default current blog)
3174	* @return bool True if not multisite or $blog_id is main site
3175	*/
3176	function is_main_site( $blog_id = '' ) {
3177	global $current_site;
3178
3179	if ( ! is_multisite() )
3180	return true;
3181
3182	if ( ! $blog_id )
3183	$blog_id = get_current_blog_id();
3184
3185	return $blog_id == $current_site->blog_id;
3186	}
3187
3188	/**
3189	* Whether global terms are enabled.
3190	*
3191	*
3192	* @since 3.0.0
3193	* @package WordPress
3194	*
3195	* @return bool True if multisite and global terms enabled
3196	*/
3197	function global_terms_enabled() {
3198	if ( ! is_multisite() )
3199	return false;
3200
3201	static $global_terms = null;
3202	if ( is_null( $global_terms ) ) {
3203	$filter = apply_filters( 'global_terms_enabled', null );
3204	if ( ! is_null( $filter ) )
3205	$global_terms = (bool) $filter;
3206	else
3207	$global_terms = (bool) get_site_option( 'global_terms_enabled', false );
3208	}
3209	return $global_terms;
3210	}
3211
3212	/**
3213	* gmt_offset modification for smart timezone handling.
3214	*
3215	* Overrides the gmt_offset option if we have a timezone_string available.
3216	*
3217	* @since 2.8.0
3218	*
3219	* @return float\|bool
3220	*/
3221	function wp_timezone_override_offset() {
3222	if ( !$timezone_string = get_option( 'timezone_string' ) ) {
3223	return false;
3224	}
3225
3226	$timezone_object = timezone_open( $timezone_string );
3227	$datetime_object = date_create();
3228	if ( false === $timezone_object \|\| false === $datetime_object ) {
3229	return false;
3230	}
3231	return round( timezone_offset_get( $timezone_object, $datetime_object ) / HOUR_IN_SECONDS, 2 );
3232	}
3233
3234	/**
3235	* {@internal Missing Short Description}}
3236	*
3237	* @since 2.9.0
3238	*
3239	* @param unknown_type $a
3240	* @param unknown_type $b
3241	* @return int
3242	*/
3243	function _wp_timezone_choice_usort_callback( $a, $b ) {
3244	// Don't use translated versions of Etc
3245	if ( 'Etc' === $a['continent'] && 'Etc' === $b['continent'] ) {
3246	// Make the order of these more like the old dropdown
3247	if ( 'GMT+' === substr( $a['city'], 0, 4 ) && 'GMT+' === substr( $b['city'], 0, 4 ) ) {
3248	return -1 * ( strnatcasecmp( $a['city'], $b['city'] ) );
3249	}
3250	if ( 'UTC' === $a['city'] ) {
3251	if ( 'GMT+' === substr( $b['city'], 0, 4 ) ) {
3252	return 1;
3253	}
3254	return -1;
3255	}
3256	if ( 'UTC' === $b['city'] ) {
3257	if ( 'GMT+' === substr( $a['city'], 0, 4 ) ) {
3258	return -1;
3259	}
3260	return 1;
3261	}
3262	return strnatcasecmp( $a['city'], $b['city'] );
3263	}
3264	if ( $a['t_continent'] == $b['t_continent'] ) {
3265	if ( $a['t_city'] == $b['t_city'] ) {
3266	return strnatcasecmp( $a['t_subcity'], $b['t_subcity'] );
3267	}
3268	return strnatcasecmp( $a['t_city'], $b['t_city'] );
3269	} else {
3270	// Force Etc to the bottom of the list
3271	if ( 'Etc' === $a['continent'] ) {
3272	return 1;
3273	}
3274	if ( 'Etc' === $b['continent'] ) {
3275	return -1;
3276	}
3277	return strnatcasecmp( $a['t_continent'], $b['t_continent'] );
3278	}
3279	}
3280
3281	/**
3282	* Gives a nicely formatted list of timezone strings. // temporary! Not in final
3283	*
3284	* @since 2.9.0
3285	*
3286	* @param string $selected_zone Selected Zone
3287	* @return string
3288	*/
3289	function wp_timezone_choice( $selected_zone ) {
3290	static $mo_loaded = false;
3291
3292	$continents = array( 'Africa', 'America', 'Antarctica', 'Arctic', 'Asia', 'Atlantic', 'Australia', 'Europe', 'Indian', 'Pacific');
3293
3294	// Load translations for continents and cities
3295	if ( !$mo_loaded ) {
3296	$locale = get_locale();
3297	$mofile = WP_LANG_DIR . '/continents-cities-' . $locale . '.mo';
3298	load_textdomain( 'continents-cities', $mofile );
3299	$mo_loaded = true;
3300	}
3301
3302	$zonen = array();
3303	foreach ( timezone_identifiers_list() as $zone ) {
3304	$zone = explode( '/', $zone );
3305	if ( !in_array( $zone[0], $continents ) ) {
3306	continue;
3307	}
3308
3309	// This determines what gets set and translated - we don't translate Etc/* strings here, they are done later
3310	$exists = array(
3311	0 => ( isset( $zone[0] ) && $zone[0] ),
3312	1 => ( isset( $zone[1] ) && $zone[1] ),
3313	2 => ( isset( $zone[2] ) && $zone[2] ),
3314	);
3315	$exists[3] = ( $exists[0] && 'Etc' !== $zone[0] );
3316	$exists[4] = ( $exists[1] && $exists[3] );
3317	$exists[5] = ( $exists[2] && $exists[3] );
3318
3319	$zonen[] = array(
3320	'continent' => ( $exists[0] ? $zone[0] : '' ),
3321	'city' => ( $exists[1] ? $zone[1] : '' ),
3322	'subcity' => ( $exists[2] ? $zone[2] : '' ),
3323	't_continent' => ( $exists[3] ? translate( str_replace( '_', ' ', $zone[0] ), 'continents-cities' ) : '' ),
3324	't_city' => ( $exists[4] ? translate( str_replace( '_', ' ', $zone[1] ), 'continents-cities' ) : '' ),
3325	't_subcity' => ( $exists[5] ? translate( str_replace( '_', ' ', $zone[2] ), 'continents-cities' ) : '' )
3326	);
3327	}
3328	usort( $zonen, '_wp_timezone_choice_usort_callback' );
3329
3330	$structure = array();
3331
3332	if ( empty( $selected_zone ) ) {
3333	$structure[] = '<option selected="selected" value="">' . __( 'Select a city' ) . '</option>';
3334	}
3335
3336	foreach ( $zonen as $key => $zone ) {
3337	// Build value in an array to join later
3338	$value = array( $zone['continent'] );
3339
3340	if ( empty( $zone['city'] ) ) {
3341	// It's at the continent level (generally won't happen)
3342	$display = $zone['t_continent'];
3343	} else {
3344	// It's inside a continent group
3345
3346	// Continent optgroup
3347	if ( !isset( $zonen[$key - 1] ) \|\| $zonen[$key - 1]['continent'] !== $zone['continent'] ) {
3348	$label = $zone['t_continent'];
3349	$structure[] = '<optgroup label="'. esc_attr( $label ) .'">';
3350	}
3351
3352	// Add the city to the value
3353	$value[] = $zone['city'];
3354
3355	$display = $zone['t_city'];
3356	if ( !empty( $zone['subcity'] ) ) {
3357	// Add the subcity to the value
3358	$value[] = $zone['subcity'];
3359	$display .= ' - ' . $zone['t_subcity'];
3360	}
3361	}
3362
3363	// Build the value
3364	$value = join( '/', $value );
3365	$selected = '';
3366	if ( $value === $selected_zone ) {
3367	$selected = 'selected="selected" ';
3368	}
3369	$structure[] = '<option ' . $selected . 'value="' . esc_attr( $value ) . '">' . esc_html( $display ) . "</option>";
3370
3371	// Close continent optgroup
3372	if ( !empty( $zone['city'] ) && ( !isset($zonen[$key + 1]) \|\| (isset( $zonen[$key + 1] ) && $zonen[$key + 1]['continent'] !== $zone['continent']) ) ) {
3373	$structure[] = '</optgroup>';
3374	}
3375	}
3376
3377	// Do UTC
3378	$structure[] = '<optgroup label="'. esc_attr__( 'UTC' ) .'">';
3379	$selected = '';
3380	if ( 'UTC' === $selected_zone )
3381	$selected = 'selected="selected" ';
3382	$structure[] = '<option ' . $selected . 'value="' . esc_attr( 'UTC' ) . '">' . __('UTC') . '</option>';
3383	$structure[] = '</optgroup>';
3384
3385	// Do manual UTC offsets
3386	$structure[] = '<optgroup label="'. esc_attr__( 'Manual Offsets' ) .'">';
3387	$offset_range = array (-12, -11.5, -11, -10.5, -10, -9.5, -9, -8.5, -8, -7.5, -7, -6.5, -6, -5.5, -5, -4.5, -4, -3.5, -3, -2.5, -2, -1.5, -1, -0.5,
3388	0, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 5.75, 6, 6.5, 7, 7.5, 8, 8.5, 8.75, 9, 9.5, 10, 10.5, 11, 11.5, 12, 12.75, 13, 13.75, 14);
3389	foreach ( $offset_range as $offset ) {
3390	if ( 0 <= $offset )
3391	$offset_name = '+' . $offset;
3392	else
3393	$offset_name = (string) $offset;
3394
3395	$offset_value = $offset_name;
3396	$offset_name = str_replace(array('.25','.5','.75'), array(':15',':30',':45'), $offset_name);
3397	$offset_name = 'UTC' . $offset_name;
3398	$offset_value = 'UTC' . $offset_value;
3399	$selected = '';
3400	if ( $offset_value === $selected_zone )
3401	$selected = 'selected="selected" ';
3402	$structure[] = '<option ' . $selected . 'value="' . esc_attr( $offset_value ) . '">' . esc_html( $offset_name ) . "</option>";
3403
3404	}
3405	$structure[] = '</optgroup>';
3406
3407	return join( "\n", $structure );
3408	}
3409
3410	/**
3411	* Strip close comment and close php tags from file headers used by WP.
3412	* See http://core.trac.wordpress.org/ticket/8497
3413	*
3414	* @since 2.8.0
3415	*
3416	* @param string $str
3417	* @return string
3418	*/
3419	function _cleanup_header_comment($str) {
3420	return trim(preg_replace("/\s(?:\\/\|\?>).*/", '', $str));
3421	}
3422
3423	/**
3424	* Permanently deletes posts, pages, attachments, and comments which have been in the trash for EMPTY_TRASH_DAYS.
3425	*
3426	* @since 2.9.0
3427	*/
3428	function wp_scheduled_delete() {
3429	global $wpdb;
3430
3431	$delete_timestamp = time() - ( DAY_IN_SECONDS * EMPTY_TRASH_DAYS );
3432
3433	$posts_to_delete = $wpdb->get_results($wpdb->prepare("SELECT post_id FROM $wpdb->postmeta WHERE meta_key = '_wp_trash_meta_time' AND meta_value < '%d'", $delete_timestamp), ARRAY_A);
3434
3435	foreach ( (array) $posts_to_delete as $post ) {
3436	$post_id = (int) $post['post_id'];
3437	if ( !$post_id )
3438	continue;
3439
3440	$del_post = get_post($post_id);
3441
3442	if ( !$del_post \|\| 'trash' != $del_post->post_status ) {
3443	delete_post_meta($post_id, '_wp_trash_meta_status');
3444	delete_post_meta($post_id, '_wp_trash_meta_time');
3445	} else {
3446	wp_delete_post($post_id);
3447	}
3448	}
3449
3450	$comments_to_delete = $wpdb->get_results($wpdb->prepare("SELECT comment_id FROM $wpdb->commentmeta WHERE meta_key = '_wp_trash_meta_time' AND meta_value < '%d'", $delete_timestamp), ARRAY_A);
3451
3452	foreach ( (array) $comments_to_delete as $comment ) {
3453	$comment_id = (int) $comment['comment_id'];
3454	if ( !$comment_id )
3455	continue;
3456
3457	$del_comment = get_comment($comment_id);
3458
3459	if ( !$del_comment \|\| 'trash' != $del_comment->comment_approved ) {
3460	delete_comment_meta($comment_id, '_wp_trash_meta_time');
3461	delete_comment_meta($comment_id, '_wp_trash_meta_status');
3462	} else {
3463	wp_delete_comment($comment_id);
3464	}
3465	}
3466	}
3467
3468	/**
3469	* Retrieve metadata from a file.
3470	*
3471	* Searches for metadata in the first 8kiB of a file, such as a plugin or theme.
3472	* Each piece of metadata must be on its own line. Fields can not span multiple
3473	* lines, the value will get cut at the end of the first line.
3474	*
3475	* If the file data is not within that first 8kiB, then the author should correct
3476	* their plugin file and move the data headers to the top.
3477	*
3478	* @see http://codex.wordpress.org/File_Header
3479	*
3480	* @since 2.9.0
3481	* @param string $file Path to the file
3482	* @param array $default_headers List of headers, in the format array('HeaderKey' => 'Header Name')
3483	* @param string $context If specified adds filter hook "extra_{$context}_headers"
3484	*/
3485	function get_file_data( $file, $default_headers, $context = '' ) {
3486	// We don't need to write to the file, so just open for reading.
3487	$fp = fopen( $file, 'r' );
3488
3489	// Pull only the first 8kiB of the file in.
3490	$file_data = fread( $fp, 8192 );
3491
3492	// PHP will close file handle, but we are good citizens.
3493	fclose( $fp );
3494
3495	// Make sure we catch CR-only line endings.
3496	$file_data = str_replace( "\r", "\n", $file_data );
3497
3498	if ( $context && $extra_headers = apply_filters( "extra_{$context}_headers", array() ) ) {
3499	$extra_headers = array_combine( $extra_headers, $extra_headers ); // keys equal values
3500	$all_headers = array_merge( $extra_headers, (array) $default_headers );
3501	} else {
3502	$all_headers = $default_headers;
3503	}
3504
3505	foreach ( $all_headers as $field => $regex ) {
3506	if ( preg_match( '/^[ \t\/#@]' . preg_quote( $regex, '/' ) . ':(.*)$/mi', $file_data, $match ) && $match[1] )
3507	$all_headers[ $field ] = _cleanup_header_comment( $match[1] );
3508	else
3509	$all_headers[ $field ] = '';
3510	}
3511
3512	return $all_headers;
3513	}
3514
3515	/**
3516	* Used internally to tidy up the search terms.
3517	*
3518	* @access private
3519	* @since 2.9.0
3520	*
3521	* @param string $t
3522	* @return string
3523	*/
3524	function _search_terms_tidy($t) {
3525	return trim($t, "\"'\n\r ");
3526	}
3527
3528	/**
3529	* Returns true.
3530	*
3531	* Useful for returning true to filters easily.
3532	*
3533	* @since 3.0.0
3534	* @see __return_false()
3535	* @return bool true
3536	*/
3537	function __return_true() {
3538	return true;
3539	}
3540
3541	/**
3542	* Returns false.
3543	*
3544	* Useful for returning false to filters easily.
3545	*
3546	* @since 3.0.0
3547	* @see __return_true()
3548	* @return bool false
3549	*/
3550	function __return_false() {
3551	return false;
3552	}
3553
3554	/**
3555	* Returns 0.
3556	*
3557	* Useful for returning 0 to filters easily.
3558	*
3559	* @since 3.0.0
3560	* @see __return_zero()
3561	* @return int 0
3562	*/
3563	function __return_zero() {
3564	return 0;
3565	}
3566
3567	/**
3568	* Returns an empty array.
3569	*
3570	* Useful for returning an empty array to filters easily.
3571	*
3572	* @since 3.0.0
3573	* @see __return_zero()
3574	* @return array Empty array
3575	*/
3576	function __return_empty_array() {
3577	return array();
3578	}
3579
3580	/**
3581	* Returns null.
3582	*
3583	* Useful for returning null to filters easily.
3584	*
3585	* @since 3.4.0
3586	* @return null
3587	*/
3588	function __return_null() {
3589	return null;
3590	}
3591
3592	/**
3593	* Send a HTTP header to disable content type sniffing in browsers which support it.
3594	*
3595	* @link http://blogs.msdn.com/ie/archive/2008/07/02/ie8-security-part-v-comprehensive-protection.aspx
3596	* @link http://src.chromium.org/viewvc/chrome?view=rev&revision=6985
3597	*
3598	* @since 3.0.0
3599	* @return none
3600	*/
3601	function send_nosniff_header() {
3602	@header( 'X-Content-Type-Options: nosniff' );
3603	}
3604
3605	/**
3606	* Returns a MySQL expression for selecting the week number based on the start_of_week option.
3607	*
3608	* @internal
3609	* @since 3.0.0
3610	* @param string $column
3611	* @return string
3612	*/
3613	function _wp_mysql_week( $column ) {
3614	switch ( $start_of_week = (int) get_option( 'start_of_week' ) ) {
3615	default :
3616	case 0 :
3617	return "WEEK( $column, 0 )";
3618	case 1 :
3619	return "WEEK( $column, 1 )";
3620	case 2 :
3621	case 3 :
3622	case 4 :
3623	case 5 :
3624	case 6 :
3625	return "WEEK( DATE_SUB( $column, INTERVAL $start_of_week DAY ), 0 )";
3626	}
3627	}
3628
3629	/**
3630	* Finds hierarchy loops using a callback function that maps object IDs to parent IDs.
3631	*
3632	* @since 3.1.0
3633	* @access private
3634	*
3635	* @param callback $callback function that accepts ( ID, $callback_args ) and outputs parent_ID
3636	* @param int $start The ID to start the loop check at
3637	* @param int $start_parent the parent_ID of $start to use instead of calling $callback( $start ). Use null to always use $callback
3638	* @param array $callback_args optional additional arguments to send to $callback
3639	* @return array IDs of all members of loop
3640	*/
3641	function wp_find_hierarchy_loop( $callback, $start, $start_parent, $callback_args = array() ) {
3642	$override = is_null( $start_parent ) ? array() : array( $start => $start_parent );
3643
3644	if ( !$arbitrary_loop_member = wp_find_hierarchy_loop_tortoise_hare( $callback, $start, $override, $callback_args ) )
3645	return array();
3646
3647	return wp_find_hierarchy_loop_tortoise_hare( $callback, $arbitrary_loop_member, $override, $callback_args, true );
3648	}
3649
3650	/**
3651	* Uses the "The Tortoise and the Hare" algorithm to detect loops.
3652	*
3653	* For every step of the algorithm, the hare takes two steps and the tortoise one.
3654	* If the hare ever laps the tortoise, there must be a loop.
3655	*
3656	* @since 3.1.0
3657	* @access private
3658	*
3659	* @param callback $callback function that accepts ( ID, callback_arg, ... ) and outputs parent_ID
3660	* @param int $start The ID to start the loop check at
3661	* @param array $override an array of ( ID => parent_ID, ... ) to use instead of $callback
3662	* @param array $callback_args optional additional arguments to send to $callback
3663	* @param bool $_return_loop Return loop members or just detect presence of loop?
3664	* Only set to true if you already know the given $start is part of a loop
3665	* (otherwise the returned array might include branches)
3666	* @return mixed scalar ID of some arbitrary member of the loop, or array of IDs of all members of loop if $_return_loop
3667	*/
3668	function wp_find_hierarchy_loop_tortoise_hare( $callback, $start, $override = array(), $callback_args = array(), $_return_loop = false ) {
3669	$tortoise = $hare = $evanescent_hare = $start;
3670	$return = array();
3671
3672	// Set evanescent_hare to one past hare
3673	// Increment hare two steps
3674	while (
3675	$tortoise
3676	&&
3677	( $evanescent_hare = isset( $override[$hare] ) ? $override[$hare] : call_user_func_array( $callback, array_merge( array( $hare ), $callback_args ) ) )
3678	&&
3679	( $hare = isset( $override[$evanescent_hare] ) ? $override[$evanescent_hare] : call_user_func_array( $callback, array_merge( array( $evanescent_hare ), $callback_args ) ) )
3680	) {
3681	if ( $_return_loop )
3682	$return[$tortoise] = $return[$evanescent_hare] = $return[$hare] = true;
3683
3684	// tortoise got lapped - must be a loop
3685	if ( $tortoise == $evanescent_hare \|\| $tortoise == $hare )
3686	return $_return_loop ? $return : $tortoise;
3687
3688	// Increment tortoise by one step
3689	$tortoise = isset( $override[$tortoise] ) ? $override[$tortoise] : call_user_func_array( $callback, array_merge( array( $tortoise ), $callback_args ) );
3690	}
3691
3692	return false;
3693	}
3694
3695	/**
3696	* Send a HTTP header to limit rendering of pages to same origin iframes.
3697	*
3698	* @link https://developer.mozilla.org/en/the_x-frame-options_response_header
3699	*
3700	* @since 3.1.3
3701	* @return none
3702	*/
3703	function send_frame_options_header() {
3704	@header( 'X-Frame-Options: SAMEORIGIN' );
3705	}
3706
3707	/**
3708	* Retrieve a list of protocols to allow in HTML attributes.
3709	*
3710	* @since 3.3.0
3711	* @see wp_kses()
3712	* @see esc_url()
3713	*
3714	* @return array Array of allowed protocols
3715	*/
3716	function wp_allowed_protocols() {
3717	static $protocols;
3718
3719	if ( empty( $protocols ) ) {
3720	$protocols = array( 'http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet', 'mms', 'rtsp', 'svn', 'tel', 'fax', 'xmpp' );
3721	$protocols = apply_filters( 'kses_allowed_protocols', $protocols );
3722	}
3723
3724	return $protocols;
3725	}
3726
3727	/**
3728	* Return a comma separated string of functions that have been called to get to the current point in code.
3729	*
3730	* @link http://core.trac.wordpress.org/ticket/19589
3731	* @since 3.4
3732	*
3733	* @param string $ignore_class A class to ignore all function calls within - useful when you want to just give info about the callee
3734	* @param int $skip_frames A number of stack frames to skip - useful for unwinding back to the source of the issue
3735	* @param bool $pretty Whether or not you want a comma separated string or raw array returned
3736	* @return string\|array Either a string containing a reversed comma separated trace or an array of individual calls.
3737	*/
3738	function wp_debug_backtrace_summary( $ignore_class = null, $skip_frames = 0, $pretty = true ) {
3739	if ( version_compare( PHP_VERSION, '5.2.5', '>=' ) )
3740	$trace = debug_backtrace( false );
3741	else
3742	$trace = debug_backtrace();
3743
3744	$caller = array();
3745	$check_class = ! is_null( $ignore_class );
3746	$skip_frames++; // skip this function
3747
3748	foreach ( $trace as $call ) {
3749	if ( $skip_frames > 0 ) {
3750	$skip_frames--;
3751	} elseif ( isset( $call['class'] ) ) {
3752	if ( $check_class && $ignore_class == $call['class'] )
3753	continue; // Filter out calls
3754
3755	$caller[] = "{$call['class']}{$call['type']}{$call['function']}";
3756	} else {
3757	if ( in_array( $call['function'], array( 'do_action', 'apply_filters' ) ) ) {
3758	$caller[] = "{$call['function']}('{$call['args'][0]}')";
3759	} elseif ( in_array( $call['function'], array( 'include', 'include_once', 'require', 'require_once' ) ) ) {
3760	$caller[] = $call['function'] . "('" . str_replace( array( WP_CONTENT_DIR, ABSPATH ) , '', $call['args'][0] ) . "')";
3761	} else {
3762	$caller[] = $call['function'];
3763	}
3764	}
3765	}
3766	if ( $pretty )
3767	return join( ', ', array_reverse( $caller ) );
3768	else
3769	return $caller;
3770	}
3771
3772	/**
3773	* Retrieve ids that are not already present in the cache
3774	*
3775	* @since 3.4.0
3776	*
3777	* @param array $object_ids ID list
3778	* @param string $cache_key The cache bucket to check against
3779	*
3780	* @return array
3781	*/
3782	function _get_non_cached_ids( $object_ids, $cache_key ) {
3783	$clean = array();
3784	foreach ( $object_ids as $id ) {
3785	$id = (int) $id;
3786	if ( !wp_cache_get( $id, $cache_key ) ) {
3787	$clean[] = $id;
3788	}
3789	}
3790
3791	return $clean;
3792	}
3793
3794	/**
3795	* Test if the current device has the capability to upload files.
3796	*
3797	* @since 3.4.0
3798	* @access private
3799	*
3800	* @return bool true\|false
3801	*/
3802	function _device_can_upload() {
3803	if ( ! wp_is_mobile() )
3804	return true;
3805
3806	$ua = $_SERVER['HTTP_USER_AGENT'];
3807
3808	if ( strpos($ua, 'iPhone') !== false
3809	\|\| strpos($ua, 'iPad') !== false
3810	\|\| strpos($ua, 'iPod') !== false ) {
3811	return preg_match( '#OS ([\d_]+) like Mac OS X#', $ua, $version ) && version_compare( $version[1], '6', '>=' );
3812	}
3813
3814	return true;
3815	}
3816
3817	/**
3818	* Test if a given path is a stream URL
3819	*
3820	* @param string $path The resource path or URL
3821	* @return bool True if the path is a stream URL
3822	*/
3823	function wp_is_stream( $path ) {
3824	$wrappers = stream_get_wrappers();
3825	$wrappers_re = '(' . join('\|', $wrappers) . ')';
3826
3827	return preg_match( "!^$wrappers_re://!", $path ) === 1;
3828	}
3829
3830	/**
3831	* Test if the supplied date is valid for the Gregorian calendar
3832	*
3833	* @since 3.5.0
3834	*
3835	* @return bool true\|false
3836	*/
3837	function wp_checkdate( $month, $day, $year, $source_date ) {
3838	return apply_filters( 'wp_checkdate', checkdate( $month, $day, $year ), $source_date );
3839	}

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Ticket #22423: functions.php

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