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Ticket #9472: post-template.php

File post-template.php, 34.3 KB (added by minusfive, 17 years ago)
Change applied to line 624 of wp-includes/post-template.php

Line
1	<?php
2	/**
3	* WordPress Post Template Functions.
4	*
5	* Gets content for the current post in the loop.
6	*
7	* @package WordPress
8	* @subpackage Template
9	*/
10
11	/**
12	* Display the ID of the current item in the WordPress Loop.
13	*
14	* @since 0.71
15	* @uses $id
16	*/
17	function the_ID() {
18	global $id;
19	echo $id;
20	}
21
22	/**
23	* Retrieve the ID of the current item in the WordPress Loop.
24	*
25	* @since 2.1.0
26	* @uses $id
27	*
28	* @return unknown
29	*/
30	function get_the_ID() {
31	global $id;
32	return $id;
33	}
34
35	/**
36	* Display or retrieve the current post title with optional content.
37	*
38	* @since 0.71
39	*
40	* @param string $before Optional. Content to prepend to the title.
41	* @param string $after Optional. Content to append to the title.
42	* @param bool $echo Optional, default to true.Whether to display or return.
43	* @return null\|string Null on no title. String if $echo parameter is false.
44	*/
45	function the_title($before = '', $after = '', $echo = true) {
46	$title = get_the_title();
47
48	if ( strlen($title) == 0 )
49	return;
50
51	$title = $before . $title . $after;
52
53	if ( $echo )
54	echo $title;
55	else
56	return $title;
57	}
58
59	/**
60	* Sanitize the current title when retrieving or displaying.
61	*
62	* Works like {@link the_title()}, except the parameters can be in a string or
63	* an array. See the function for what can be override in the $args parameter.
64	*
65	* The title before it is displayed will have the tags stripped and {@link
66	* attribute_escape()} before it is passed to the user or displayed. The default
67	* as with {@link the_title()}, is to display the title.
68	*
69	* @since 2.3.0
70	*
71	* @param string\|array $args Optional. Override the defaults.
72	* @return string\|null Null on failure or display. String when echo is false.
73	*/
74	function the_title_attribute( $args = '' ) {
75	$title = get_the_title();
76
77	if ( strlen($title) == 0 )
78	return;
79
80	$defaults = array('before' => '', 'after' => '', 'echo' => true);
81	$r = wp_parse_args($args, $defaults);
82	extract( $r, EXTR_SKIP );
83
84
85	$title = $before . $title . $after;
86	$title = attribute_escape(strip_tags($title));
87
88	if ( $echo )
89	echo $title;
90	else
91	return $title;
92	}
93
94	/**
95	* Retrieve post title.
96	*
97	* If the post is protected and the visitor is not an admin, then "Protected"
98	* will be displayed before the post title. If the post is private, then
99	* "Private" will be located before the post title.
100	*
101	* @since 0.71
102	*
103	* @param int $id Optional. Post ID.
104	* @return string
105	*/
106	function get_the_title( $id = 0 ) {
107	$post = &get_post($id);
108
109	$title = $post->post_title;
110
111	if ( !is_admin() ) {
112	if ( !empty($post->post_password) )
113	$title = sprintf(__('Protected: %s'), $title);
114	else if ( isset($post->post_status) && 'private' == $post->post_status )
115	$title = sprintf(__('Private: %s'), $title);
116	}
117	return apply_filters( 'the_title', $title );
118	}
119
120	/**
121	* Display the Post Global Unique Identifier (guid).
122	*
123	* The guid will appear to be a link, but should not be used as an link to the
124	* post. The reason you should not use it as a link, is because of moving the
125	* blog across domains.
126	*
127	* @since 1.5.0
128	*
129	* @param int $id Optional. Post ID.
130	*/
131	function the_guid( $id = 0 ) {
132	echo get_the_guid($id);
133	}
134
135	/**
136	* Retrieve the Post Global Unique Identifier (guid).
137	*
138	* The guid will appear to be a link, but should not be used as an link to the
139	* post. The reason you should not use it as a link, is because of moving the
140	* blog across domains.
141	*
142	* @since 1.5.0
143	*
144	* @param int $id Optional. Post ID.
145	* @return string
146	*/
147	function get_the_guid( $id = 0 ) {
148	$post = &get_post($id);
149
150	return apply_filters('get_the_guid', $post->guid);
151	}
152
153	/**
154	* Display the post content.
155	*
156	* @since 0.71
157	*
158	* @param string $more_link_text Optional. Content for when there is more text.
159	* @param string $stripteaser Optional. Teaser content before the more text.
160	* @param string $more_file Optional. Not used.
161	*/
162	function the_content($more_link_text = null, $stripteaser = 0, $more_file = '') {
163	$content = get_the_content($more_link_text, $stripteaser, $more_file);
164	$content = apply_filters('the_content', $content);
165	$content = str_replace(']]>', ']]>', $content);
166	echo $content;
167	}
168
169	/**
170	* Retrieve the post content.
171	*
172	* @since 0.71
173	*
174	* @param string $more_link_text Optional. Content for when there is more text.
175	* @param string $stripteaser Optional. Teaser content before the more text.
176	* @param string $more_file Optional. Not used.
177	* @return string
178	*/
179	function get_the_content($more_link_text = null, $stripteaser = 0, $more_file = '') {
180	global $id, $post, $more, $page, $pages, $multipage, $preview, $pagenow;
181
182	if ( null === $more_link_text )
183	$more_link_text = __( '(more...)' );
184
185	$output = '';
186
187	// If post password required and it doesn't match the cookie.
188	if ( post_password_required($post) ) {
189	$output = get_the_password_form();
190	return $output;
191	}
192
193	if ( $more_file != '' )
194	$file = $more_file;
195	else
196	$file = $pagenow; //$_SERVER['PHP_SELF'];
197
198	if ( $page > count($pages) ) // if the requested page doesn't exist
199	$page = count($pages); // give them the highest numbered page that DOES exist
200
201	$content = $pages[$page-1];
202	if ( preg_match('/<!--more(.*?)?-->/', $content, $matches) ) {
203	$content = explode($matches[0], $content, 2);
204	if ( !empty($matches[1]) && !empty($more_link_text) )
205	$more_link_text = strip_tags(wp_kses_no_null(trim($matches[1])));
206	} else {
207	$content = array($content);
208	}
209	if ( (false !== strpos($post->post_content, '<!--noteaser-->') && ((!$multipage) \|\| ($page==1))) )
210	$stripteaser = 1;
211	$teaser = $content[0];
212	if ( ($more) && ($stripteaser) )
213	$teaser = '';
214	$output .= $teaser;
215	if ( count($content) > 1 ) {
216	if ( $more ) {
217	$output .= '<span id="more-'.$id.'"></span>'.$content[1];
218	} else {
219	$output = balanceTags($output);
220	if ( ! empty($more_link_text) )
221	$output .= ' <a href="'. get_permalink() . "#more-$id\" class=\"more-link\">$more_link_text</a>";
222	}
223
224	}
225	if ( $preview ) // preview fix for javascript bug with foreign languages
226	$output = preg_replace_callback('/\%u([0-9A-F]{4})/', create_function('$match', 'return "&#" . base_convert($match[1], 16, 10) . ";";'), $output);
227
228	return $output;
229	}
230
231	/**
232	* Display the post excerpt.
233	*
234	* @since 0.71
235	* @uses apply_filters() Calls 'the_excerpt' hook on post excerpt.
236	*/
237	function the_excerpt() {
238	echo apply_filters('the_excerpt', get_the_excerpt());
239	}
240
241	/**
242	* Retrieve the post excerpt.
243	*
244	* @since 0.71
245	*
246	* @param mixed $deprecated Not used.
247	* @return string
248	*/
249	function get_the_excerpt($deprecated = '') {
250	global $post;
251	$output = '';
252	$output = $post->post_excerpt;
253	if ( post_password_required($post) ) {
254	$output = __('There is no excerpt because this is a protected post.');
255	return $output;
256	}
257
258	return apply_filters('get_the_excerpt', $output);
259	}
260
261	/**
262	* Whether post has excerpt.
263	*
264	* @since 2.3.0
265	*
266	* @param int $id Optional. Post ID.
267	* @return bool
268	*/
269	function has_excerpt( $id = 0 ) {
270	$post = &get_post( $id );
271	return ( !empty( $post->post_excerpt ) );
272	}
273
274	/**
275	* Display the classes for the post div.
276	*
277	* @since 2.7.0
278	*
279	* @param string\|array $class One or more classes to add to the class list.
280	* @param int $post_id An optional post ID.
281	*/
282	function post_class( $class = '', $post_id = null ) {
283	// Separates classes with a single space, collates classes for post DIV
284	echo 'class="' . join( ' ', get_post_class( $class, $post_id ) ) . '"';
285	}
286
287	/**
288	* Retrieve the classes for the post div as an array.
289	*
290	* The class names are add are many. If the post is a sticky, then the 'sticky'
291	* class name. The class 'hentry' is always added to each post. For each
292	* category, the class will be added with 'category-' with category slug is
293	* added. The tags are the same way as the categories with 'tag-' before the tag
294	* slug. All classes are passed through the filter, 'post_class' with the list
295	* of classes, followed by $class parameter value, with the post ID as the last
296	* parameter.
297	*
298	* @since 2.7.0
299	*
300	* @param string\|array $class One or more classes to add to the class list.
301	* @param int $post_id An optional post ID.
302	* @return array Array of classes.
303	*/
304	function get_post_class( $class = '', $post_id = null ) {
305	$post = get_post($post_id);
306
307	$classes = array();
308
309	$classes[] = $post->post_type;
310
311	// sticky for Sticky Posts
312	if ( is_sticky($post->ID) && is_home())
313	$classes[] = 'sticky';
314
315	// hentry for hAtom compliace
316	$classes[] = 'hentry';
317
318	// Categories
319	foreach ( (array) get_the_category($post->ID) as $cat ) {
320	if ( empty($cat->slug ) )
321	continue;
322	$classes[] = 'category-' . $cat->slug;
323	}
324
325	// Tags
326	foreach ( (array) get_the_tags($post->ID) as $tag ) {
327	if ( empty($tag->slug ) )
328	continue;
329	$classes[] = 'tag-' . $tag->slug;
330	}
331
332	if ( !empty($class) ) {
333	if ( !is_array( $class ) )
334	$class = preg_split('#\s+#', $class);
335	$classes = array_merge($classes, $class);
336	}
337
338	return apply_filters('post_class', $classes, $class, $post_id);
339	}
340
341	/**
342	* Whether post requires password and correct password has been provided.
343	*
344	* @since 2.7.0
345	*
346	* @param int\|object $post An optional post. Global $post used if not provided.
347	* @return bool false if a password is not required or the correct password cookie is present, true otherwise.
348	*/
349	function post_password_required( $post = null ) {
350	$post = get_post($post);
351
352	if ( empty($post->post_password) )
353	return false;
354
355	if ( !isset($_COOKIE['wp-postpass_' . COOKIEHASH]) )
356	return true;
357
358	if ( $_COOKIE['wp-postpass_' . COOKIEHASH] != $post->post_password )
359	return true;
360
361	return false;
362	}
363
364	/**
365	* Display "sticky" CSS class, if a post is sticky.
366	*
367	* @since 2.7.0
368	*
369	* @param int $post_id An optional post ID.
370	*/
371	function sticky_class( $post_id = null ) {
372	if ( !is_sticky($post_id) )
373	return;
374
375	echo " sticky";
376	}
377
378	/**
379	* Page Template Functions for usage in Themes
380	*
381	* @package WordPress
382	* @subpackage Template
383	*/
384
385	/**
386	* The formatted output of a list of pages.
387	*
388	* Displays page links for paginated posts (i.e. includes the <!--nextpage-->.
389	* Quicktag one or more times). This tag must be within The Loop.
390	*
391	* The defaults for overwriting are:
392	* 'next_or_number' - Default is 'number' (string). Indicates whether page
393	* numbers should be used. Valid values are number and next.
394	* 'nextpagelink' - Default is 'Next Page' (string). Text for link to next page.
395	* of the bookmark.
396	* 'previouspagelink' - Default is 'Previous Page' (string). Text for link to
397	* previous page, if available.
398	* 'pagelink' - Default is '%' (String).Format string for page numbers. The % in
399	* the parameter string will be replaced with the page number, so Page %
400	* generates "Page 1", "Page 2", etc. Defaults to %, just the page number.
401	* 'before' - Default is '<p> Pages:' (string). The html or text to prepend to
402	* each bookmarks.
403	* 'after' - Default is '</p>' (string). The html or text to append to each
404	* bookmarks.
405	* 'more_file' - Default is '' (string) Page the links should point to. Defaults
406	* to the current page.
407	* 'link_before' - Default is '' (string). The html or text to prepend to each
408	* Pages link inside the <a> tag.
409	* 'link_after' - Default is '' (string). The html or text to append to each
410	* Pages link inside the <a> tag.
411	*
412	* @since 1.2.0
413	* @access private
414	*
415	* @param string\|array $args Optional. Overwrite the defaults.
416	* @return string Formatted output in HTML.
417	*/
418	function wp_link_pages($args = '') {
419	$defaults = array(
420	'before' => '<p>' . __('Pages:'), 'after' => '</p>',
421	'link_before' => '', 'link_after' => '',
422	'next_or_number' => 'number', 'nextpagelink' => __('Next page'),
423	'previouspagelink' => __('Previous page'), 'pagelink' => '%',
424	'more_file' => '', 'echo' => 1
425	);
426
427	$r = wp_parse_args( $args, $defaults );
428	extract( $r, EXTR_SKIP );
429
430	global $post, $page, $numpages, $multipage, $more, $pagenow;
431	if ( $more_file != '' )
432	$file = $more_file;
433	else
434	$file = $pagenow;
435
436	$output = '';
437	if ( $multipage ) {
438	if ( 'number' == $next_or_number ) {
439	$output .= $before;
440	for ( $i = 1; $i < ($numpages+1); $i = $i + 1 ) {
441	$j = str_replace('%',"$i",$pagelink);
442	$output .= ' ';
443	if ( ($i != $page) \|\| ((!$more) && ($page==1)) ) {
444	if ( 1 == $i ) {
445	$output .= '<a href="' . get_permalink() . '">';
446	} else {
447	if ( '' == get_option('permalink_structure') \|\| in_array($post->post_status, array('draft', 'pending')) )
448	$output .= '<a href="' . get_permalink() . '&page=' . $i . '">';
449	else
450	$output .= '<a href="' . trailingslashit(get_permalink()) . user_trailingslashit($i, 'single_paged') . '">';
451	}
452
453	}
454	$output .= $link_before;
455	$output .= $j;
456	$output .= $link_after;
457	if ( ($i != $page) \|\| ((!$more) && ($page==1)) )
458	$output .= '</a>';
459	}
460	$output .= $after;
461	} else {
462	if ( $more ) {
463	$output .= $before;
464	$i = $page - 1;
465	if ( $i && $more ) {
466	if ( 1 == $i ) {
467	$output .= '<a href="' . get_permalink() . '">' . $link_before. $previouspagelink . $link_after . '</a>';
468	} else {
469	if ( '' == get_option('permalink_structure') \|\| in_array($post->post_status, array('draft', 'pending')) )
470	$output .= '<a href="' . get_permalink() . '&page=' . $i . '">' . $link_before. $previouspagelink . $link_after . '</a>';
471	else
472	$output .= '<a href="' . trailingslashit(get_permalink()) . user_trailingslashit($i, 'single_paged') . '">' . $link_before. $previouspagelink . $link_after . '</a>';
473	}
474	}
475	$i = $page + 1;
476	if ( $i <= $numpages && $more ) {
477	if ( 1 == $i ) {
478	$output .= '<a href="' . get_permalink() . '">' . $link_before. $nextpagelink . $link_after . '</a>';
479	} else {
480	if ( '' == get_option('permalink_structure') \|\| in_array($post->post_status, array('draft', 'pending')) )
481	$output .= '<a href="' . get_permalink() . '&page=' . $i . '">' . $link_before. $nextpagelink . $link_after . '</a>';
482	else
483	$output .= '<a href="' . trailingslashit(get_permalink()) . user_trailingslashit($i, 'single_paged') . '">' . $link_before. $nextpagelink . $link_after . '</a>';
484	}
485	}
486	$output .= $after;
487	}
488	}
489	}
490
491	if ( $echo )
492	echo $output;
493
494	return $output;
495	}
496
497
498	//
499	// Post-meta: Custom per-post fields.
500	//
501
502	/**
503	* Retrieve post custom meta data field.
504	*
505	* @since 1.5.0
506	*
507	* @param string $key Meta data key name.
508	* @return string\|array Array of values or single value, if only one element exists.
509	*/
510	function post_custom( $key = '' ) {
511	$custom = get_post_custom();
512
513	if ( 1 == count($custom[$key]) )
514	return $custom[$key][0];
515	else
516	return $custom[$key];
517	}
518
519	/**
520	* Display list of post custom fields.
521	*
522	* @internal This will probably change at some point...
523	* @since 1.2.0
524	* @uses apply_filters() Calls 'the_meta_key' on list item HTML content, with key and value as separate parameters.
525	*/
526	function the_meta() {
527	if ( $keys = get_post_custom_keys() ) {
528	echo "<ul class='post-meta'>\n";
529	foreach ( (array) $keys as $key ) {
530	$keyt = trim($key);
531	if ( '_' == $keyt{0} )
532	continue;
533	$values = array_map('trim', get_post_custom_values($key));
534	$value = implode($values,', ');
535	echo apply_filters('the_meta_key', "<li><span class='post-meta-key'>$key:</span> $value</li>\n", $key, $value);
536	}
537	echo "</ul>\n";
538	}
539	}
540
541	//
542	// Pages
543	//
544
545	/**
546	* Retrieve or display list of pages as a dropdown (select list).
547	*
548	* @since 2.1.0
549	*
550	* @param array\|string $args Optional. Override default arguments.
551	* @return string HTML content, if not displaying.
552	*/
553	function wp_dropdown_pages($args = '') {
554	$defaults = array(
555	'depth' => 0, 'child_of' => 0,
556	'selected' => 0, 'echo' => 1,
557	'name' => 'page_id', 'show_option_none' => '', 'show_option_no_change' => '',
558	'option_none_value' => ''
559	);
560
561	$r = wp_parse_args( $args, $defaults );
562	extract( $r, EXTR_SKIP );
563
564	$pages = get_pages($r);
565	$output = '';
566
567	if ( ! empty($pages) ) {
568	$output = "<select name=\"$name\" id=\"$name\">\n";
569	if ( $show_option_no_change )
570	$output .= "\t<option value=\"-1\">$show_option_no_change</option>";
571	if ( $show_option_none )
572	$output .= "\t<option value=\"$option_none_value\">$show_option_none</option>\n";
573	$output .= walk_page_dropdown_tree($pages, $depth, $r);
574	$output .= "</select>\n";
575	}
576
577	$output = apply_filters('wp_dropdown_pages', $output);
578
579	if ( $echo )
580	echo $output;
581
582	return $output;
583	}
584
585	/**
586	* Retrieve or display list of pages in list (li) format.
587	*
588	* @since 1.5.0
589	*
590	* @param array\|string $args Optional. Override default arguments.
591	* @return string HTML content, if not displaying.
592	*/
593	function wp_list_pages($args = '') {
594	$defaults = array(
595	'depth' => 0, 'show_date' => '',
596	'date_format' => get_option('date_format'),
597	'child_of' => 0, 'exclude' => '',
598	'title_li' => __('Pages'), 'echo' => 1,
599	'authors' => '', 'sort_column' => 'menu_order, post_title',
600	'link_before' => '', 'link_after' => ''
601	);
602
603	$r = wp_parse_args( $args, $defaults );
604	extract( $r, EXTR_SKIP );
605
606	$output = '';
607	$current_page = 0;
608
609	// sanitize, mostly to keep spaces out
610	$r['exclude'] = preg_replace('/[^0-9,]/', '', $r['exclude']);
611
612	// Allow plugins to filter an array of excluded pages
613	$r['exclude'] = implode(',', apply_filters('wp_list_pages_excludes', explode(',', $r['exclude'])));
614
615	// Query pages.
616	$r['hierarchical'] = 0;
617	$pages = get_pages($r);
618
619	if ( !empty($pages) ) {
620	if ( $r['title_li'] )
621	$output .= '<li class="pagenav">' . $r['title_li'] . '<ul>';
622
623	global $wp_query;
624	if ( is_page() \|\| is_attachment() \|\| $wp_query->is_posts_page )
625	$current_page = $wp_query->get_queried_object_id();
626	$output .= walk_page_tree($pages, $r['depth'], $current_page, $r);
627
628	if ( $r['title_li'] )
629	$output .= '</ul></li>';
630	}
631
632	$output = apply_filters('wp_list_pages', $output);
633
634	if ( $r['echo'] )
635	echo $output;
636	else
637	return $output;
638	}
639
640	/**
641	* Display or retrieve list of pages with optional home link.
642	*
643	* The arguments are listed below and part of the arguments are for {@link
644	* wp_list_pages()} function. Check that function for more info on those
645	* arguments.
646	*
647	* <ul>
648	* <li><strong>sort_column</strong> - How to sort the list of pages. Defaults
649	* to page title. Use column for posts table.</li>
650	* <li><strong>menu_class</strong> - Class to use for the div ID which contains
651	* the page list. Defaults to 'menu'.</li>
652	* <li><strong>echo</strong> - Whether to echo list or return it. Defaults to
653	* echo.</li>
654	* <li><strong>link_before</strong> - Text before show_home argument text.</li>
655	* <li><strong>link_after</strong> - Text after show_home argument text.</li>
656	* <li><strong>show_home</strong> - If you set this argument, then it will
657	* display the link to the home page. The show_home argument really just needs
658	* to be set to the value of the text of the link.</li>
659	* </ul>
660	*
661	* @since 2.7.0
662	*
663	* @param array\|string $args
664	*/
665	function wp_page_menu( $args = array() ) {
666	$defaults = array('sort_column' => 'post_title', 'menu_class' => 'menu', 'echo' => true, 'link_before' => '', 'link_after' => '');
667	$args = wp_parse_args( $args, $defaults );
668	$args = apply_filters( 'wp_page_menu_args', $args );
669
670	$menu = '';
671
672	$list_args = $args;
673
674	// Show Home in the menu
675	if ( isset($args['show_home']) && ! empty($args['show_home']) ) {
676	if ( true === $args['show_home'] \|\| '1' === $args['show_home'] \|\| 1 === $args['show_home'] )
677	$text = __('Home');
678	else
679	$text = $args['show_home'];
680	$class = '';
681	if ( is_front_page() && !is_paged() )
682	$class = 'class="current_page_item"';
683	$menu .= '<li ' . $class . '><a href="' . get_option('home') . '">' . $args['link_before'] . $text . $args['link_after'] . '</a></li>';
684	// If the front page is a page, add it to the exclude list
685	if (get_option('show_on_front') == 'page') {
686	if ( !empty( $list_args['exclude'] ) ) {
687	$list_args['exclude'] .= ',';
688	} else {
689	$list_args['exclude'] = '';
690	}
691	$list_args['exclude'] .= get_option('page_on_front');
692	}
693	}
694
695	$list_args['echo'] = false;
696	$list_args['title_li'] = '';
697	$menu .= str_replace( array( "\r", "\n", "\t" ), '', wp_list_pages($list_args) );
698
699	if ( $menu )
700	$menu = '<ul>' . $menu . '</ul>';
701
702	$menu = '<div class="' . $args['menu_class'] . '">' . $menu . "</div>\n";
703	$menu = apply_filters( 'wp_page_menu', $menu, $args );
704	if ( $args['echo'] )
705	echo $menu;
706	else
707	return $menu;
708	}
709
710	//
711	// Page helpers
712	//
713
714	/**
715	* Retrieve HTML list content for page list.
716	*
717	* @uses Walker_Page to create HTML list content.
718	* @since 2.1.0
719	* @see Walker_Page::walk() for parameters and return description.
720	*/
721	function walk_page_tree($pages, $depth, $current_page, $r) {
722	$walker = new Walker_Page;
723	$args = array($pages, $depth, $r, $current_page);
724	return call_user_func_array(array(&$walker, 'walk'), $args);
725	}
726
727	/**
728	* Retrieve HTML dropdown (select) content for page list.
729	*
730	* @uses Walker_PageDropdown to create HTML dropdown content.
731	* @since 2.1.0
732	* @see Walker_PageDropdown::walk() for parameters and return description.
733	*/
734	function walk_page_dropdown_tree() {
735	$walker = new Walker_PageDropdown;
736	$args = func_get_args();
737	return call_user_func_array(array(&$walker, 'walk'), $args);
738	}
739
740	//
741	// Attachments
742	//
743
744	/**
745	* Display an attachment page link using an image or icon.
746	*
747	* @since 2.0.0
748	*
749	* @param int $id Optional. Post ID.
750	* @param bool $fullsize Optional, default is false. Whether to use full size.
751	* @param bool $deprecated Deprecated. Not used.
752	* @param bool $permalink Optional, default is false. Whether to include permalink.
753	*/
754	function the_attachment_link($id = 0, $fullsize = false, $deprecated = false, $permalink = false) {
755	if ( $fullsize )
756	echo wp_get_attachment_link($id, 'full', $permalink);
757	else
758	echo wp_get_attachment_link($id, 'thumbnail', $permalink);
759	}
760
761	/**
762	* Retrieve an attachment page link using an image or icon, if possible.
763	*
764	* @since 2.5.0
765	* @uses apply_filters() Calls 'wp_get_attachment_link' filter on HTML content with same parameters as function.
766	*
767	* @param int $id Optional. Post ID.
768	* @param string $size Optional. Image size.
769	* @param bool $permalink Optional, default is false. Whether to add permalink to image.
770	* @param bool $icon Optional, default is false. Whether to include icon.
771	* @return string HTML content.
772	*/
773	function wp_get_attachment_link($id = 0, $size = 'thumbnail', $permalink = false, $icon = false) {
774	$id = intval($id);
775	$_post = & get_post( $id );
776
777	if ( ('attachment' != $_post->post_type) \|\| !$url = wp_get_attachment_url($_post->ID) )
778	return __('Missing Attachment');
779
780	if ( $permalink )
781	$url = get_attachment_link($_post->ID);
782
783	$post_title = attribute_escape($_post->post_title);
784
785	$link_text = wp_get_attachment_image($id, $size, $icon);
786	if ( !$link_text )
787	$link_text = $_post->post_title;
788
789	return apply_filters( 'wp_get_attachment_link', "<a href='$url' title='$post_title'>$link_text</a>", $id, $size, $permalink, $icon );
790	}
791
792	/**
793	* Retrieve HTML content of attachment image with link.
794	*
795	* @since 2.0.0
796	* @deprecated Use {@link wp_get_attachment_link()}
797	* @see wp_get_attachment_link() Use instead.
798	*
799	* @param int $id Optional. Post ID.
800	* @param bool $fullsize Optional, default is false. Whether to use full size image.
801	* @param array $max_dims Optional. Max image dimensions.
802	* @param bool $permalink Optional, default is false. Whether to include permalink to image.
803	* @return string
804	*/
805	function get_the_attachment_link($id = 0, $fullsize = false, $max_dims = false, $permalink = false) {
806	$id = (int) $id;
807	$_post = & get_post($id);
808
809	if ( ('attachment' != $_post->post_type) \|\| !$url = wp_get_attachment_url($_post->ID) )
810	return __('Missing Attachment');
811
812	if ( $permalink )
813	$url = get_attachment_link($_post->ID);
814
815	$post_title = attribute_escape($_post->post_title);
816
817	$innerHTML = get_attachment_innerHTML($_post->ID, $fullsize, $max_dims);
818	return "<a href='$url' title='$post_title'>$innerHTML</a>";
819	}
820
821	/**
822	* Retrieve icon URL and Path.
823	*
824	* @since 2.1.0
825	* @deprecated Use {@link wp_get_attachment_image_src()}
826	* @see wp_get_attachment_image_src() Use instead.
827	*
828	* @param int $id Optional. Post ID.
829	* @param bool $fullsize Optional, default to false. Whether to have full image.
830	* @return array Icon URL and full path to file, respectively.
831	*/
832	function get_attachment_icon_src( $id = 0, $fullsize = false ) {
833	$id = (int) $id;
834	if ( !$post = & get_post($id) )
835	return false;
836
837	$file = get_attached_file( $post->ID );
838
839	if ( !$fullsize && $src = wp_get_attachment_thumb_url( $post->ID ) ) {
840	// We have a thumbnail desired, specified and existing
841
842	$src_file = basename($src);
843	$class = 'attachmentthumb';
844	} elseif ( wp_attachment_is_image( $post->ID ) ) {
845	// We have an image without a thumbnail
846
847	$src = wp_get_attachment_url( $post->ID );
848	$src_file = & $file;
849	$class = 'attachmentimage';
850	} elseif ( $src = wp_mime_type_icon( $post->ID ) ) {
851	// No thumb, no image. We'll look for a mime-related icon instead.
852
853	$icon_dir = apply_filters( 'icon_dir', get_template_directory() . '/images' );
854	$src_file = $icon_dir . '/' . basename($src);
855	}
856
857	if ( !isset($src) \|\| !$src )
858	return false;
859
860	return array($src, $src_file);
861	}
862
863	/**
864	* Retrieve HTML content of icon attachment image element.
865	*
866	* @since 2.0.0
867	* @deprecated Use {@link wp_get_attachment_image()}
868	* @see wp_get_attachment_image() Use instead of.
869	*
870	* @param int $id Optional. Post ID.
871	* @param bool $fullsize Optional, default to false. Whether to have full size image.
872	* @param array $max_dims Optional. Dimensions of image.
873	* @return string HTML content.
874	*/
875	function get_attachment_icon( $id = 0, $fullsize = false, $max_dims = false ) {
876	$id = (int) $id;
877	if ( !$post = & get_post($id) )
878	return false;
879
880	if ( !$src = get_attachment_icon_src( $post->ID, $fullsize ) )
881	return false;
882
883	list($src, $src_file) = $src;
884
885	// Do we need to constrain the image?
886	if ( ($max_dims = apply_filters('attachment_max_dims', $max_dims)) && file_exists($src_file) ) {
887
888	$imagesize = getimagesize($src_file);
889
890	if (($imagesize[0] > $max_dims[0]) \|\| $imagesize[1] > $max_dims[1] ) {
891	$actual_aspect = $imagesize[0] / $imagesize[1];
892	$desired_aspect = $max_dims[0] / $max_dims[1];
893
894	if ( $actual_aspect >= $desired_aspect ) {
895	$height = $actual_aspect * $max_dims[0];
896	$constraint = "width='{$max_dims[0]}' ";
897	$post->iconsize = array($max_dims[0], $height);
898	} else {
899	$width = $max_dims[1] / $actual_aspect;
900	$constraint = "height='{$max_dims[1]}' ";
901	$post->iconsize = array($width, $max_dims[1]);
902	}
903	} else {
904	$post->iconsize = array($imagesize[0], $imagesize[1]);
905	$constraint = '';
906	}
907	} else {
908	$constraint = '';
909	}
910
911	$post_title = attribute_escape($post->post_title);
912
913	$icon = "<img src='$src' title='$post_title' alt='$post_title' $constraint/>";
914
915	return apply_filters( 'attachment_icon', $icon, $post->ID );
916	}
917
918	/**
919	* Retrieve HTML content of image element.
920	*
921	* @since 2.0.0
922	* @deprecated Use {@link wp_get_attachment_image()}
923	* @see wp_get_attachment_image() Use instead.
924	*
925	* @param int $id Optional. Post ID.
926	* @param bool $fullsize Optional, default to false. Whether to have full size image.
927	* @param array $max_dims Optional. Dimensions of image.
928	* @return string
929	*/
930	function get_attachment_innerHTML($id = 0, $fullsize = false, $max_dims = false) {
931	$id = (int) $id;
932	if ( !$post = & get_post($id) )
933	return false;
934
935	if ( $innerHTML = get_attachment_icon($post->ID, $fullsize, $max_dims))
936	return $innerHTML;
937
938
939	$innerHTML = attribute_escape($post->post_title);
940
941	return apply_filters('attachment_innerHTML', $innerHTML, $post->ID);
942	}
943
944	/**
945	* Wrap attachment in <<p>> element before content.
946	*
947	* @since 2.0.0
948	* @uses apply_filters() Calls 'prepend_attachment' hook on HTML content.
949	*
950	* @param string $content
951	* @return string
952	*/
953	function prepend_attachment($content) {
954	global $post;
955
956	if ( empty($post->post_type) \|\| $post->post_type != 'attachment' )
957	return $content;
958
959	$p = '<p class="attachment">';
960	// show the medium sized image representation of the attachment if available, and link to the raw file
961	$p .= wp_get_attachment_link(0, 'medium', false);
962	$p .= '</p>';
963	$p = apply_filters('prepend_attachment', $p);
964
965	return "$p\n$content";
966	}
967
968	//
969	// Misc
970	//
971
972	/**
973	* Retrieve protected post password form content.
974	*
975	* @since 1.0.0
976	* @uses apply_filters() Calls 'the_password_form' filter on output.
977	*
978	* @return string HTML content for password form for password protected post.
979	*/
980	function get_the_password_form() {
981	global $post;
982	$label = 'pwbox-'.(empty($post->ID) ? rand() : $post->ID);
983	$output = '<form action="' . get_option('siteurl') . '/wp-pass.php" method="post">
984	<p>' . __("This post is password protected. To view it please enter your password below:") . '</p>
985	<p><label for="' . $label . '">' . __("Password:") . ' <input name="post_password" id="' . $label . '" type="password" size="20" /></label> <input type="submit" name="Submit" value="' . __("Submit") . '" /></p>
986	</form>
987	';
988	return apply_filters('the_password_form', $output);
989	}
990
991	/**
992	* Whether currently in a page template.
993	*
994	* This template tag allows you to determine whether or not you are in a page
995	* template. You can optional provide a template name and then the check will be
996	* specific to that template.
997	*
998	* @since 2.5.0
999	* @uses $wp_query
1000	*
1001	* @param string $template The specific template name if specific matching is required.
1002	* @return bool False on failure, true if success.
1003	*/
1004	function is_page_template($template = '') {
1005	if (!is_page()) {
1006	return false;
1007	}
1008
1009	global $wp_query;
1010
1011	$page = $wp_query->get_queried_object();
1012	$custom_fields = get_post_custom_values('_wp_page_template',$page->ID);
1013	$page_template = $custom_fields[0];
1014
1015	// We have no argument passed so just see if a page_template has been specified
1016	if ( empty( $template ) ) {
1017	if (!empty( $page_template ) ) {
1018	return true;
1019	}
1020	} elseif ( $template == $page_template) {
1021	return true;
1022	}
1023
1024	return false;
1025	}
1026
1027	/**
1028	* Retrieve formatted date timestamp of a revision (linked to that revisions's page).
1029	*
1030	* @package WordPress
1031	* @subpackage Post_Revisions
1032	* @since 2.6.0
1033	*
1034	* @uses date_i18n()
1035	*
1036	* @param int\|object $revision Revision ID or revision object.
1037	* @param bool $link Optional, default is true. Link to revisions's page?
1038	* @return string i18n formatted datetimestamp or localized 'Current Revision'.
1039	*/
1040	function wp_post_revision_title( $revision, $link = true ) {
1041	if ( !$revision = get_post( $revision ) )
1042	return $revision;
1043
1044	if ( !in_array( $revision->post_type, array( 'post', 'page', 'revision' ) ) )
1045	return false;
1046
1047	$datef = _c( 'j F, Y @ G:i\|revision date format');
1048	$autosavef = __( '%s [Autosave]' );
1049	$currentf = __( '%s [Current Revision]' );
1050
1051	$date = date_i18n( $datef, strtotime( $revision->post_modified ) );
1052	if ( $link && current_user_can( 'edit_post', $revision->ID ) && $link = get_edit_post_link( $revision->ID ) )
1053	$date = "<a href='$link'>$date</a>";
1054
1055	if ( !wp_is_post_revision( $revision ) )
1056	$date = sprintf( $currentf, $date );
1057	elseif ( wp_is_post_autosave( $revision ) )
1058	$date = sprintf( $autosavef, $date );
1059
1060	return $date;
1061	}
1062
1063	/**
1064	* Display list of a post's revisions.
1065	*
1066	* Can output either a UL with edit links or a TABLE with diff interface, and
1067	* restore action links.
1068	*
1069	* Second argument controls parameters:
1070	* (bool) parent : include the parent (the "Current Revision") in the list.
1071	* (string) format : 'list' or 'form-table'. 'list' outputs UL, 'form-table'
1072	* outputs TABLE with UI.
1073	* (int) right : what revision is currently being viewed - used in
1074	* form-table format.
1075	* (int) left : what revision is currently being diffed against right -
1076	* used in form-table format.
1077	*
1078	* @package WordPress
1079	* @subpackage Post_Revisions
1080	* @since 2.6.0
1081	*
1082	* @uses wp_get_post_revisions()
1083	* @uses wp_post_revision_title()
1084	* @uses get_edit_post_link()
1085	* @uses get_author_name()
1086	*
1087	* @todo split into two functions (list, form-table) ?
1088	*
1089	* @param int\|object $post_id Post ID or post object.
1090	* @param string\|array $args See description {@link wp_parse_args()}.
1091	* @return null
1092	*/
1093	function wp_list_post_revisions( $post_id = 0, $args = null ) {
1094	if ( !$post = get_post( $post_id ) )
1095	return;
1096
1097	$defaults = array( 'parent' => false, 'right' => false, 'left' => false, 'format' => 'list', 'type' => 'all' );
1098	extract( wp_parse_args( $args, $defaults ), EXTR_SKIP );
1099
1100	switch ( $type ) {
1101	case 'autosave' :
1102	if ( !$autosave = wp_get_post_autosave( $post->ID ) )
1103	return;
1104	$revisions = array( $autosave );
1105	break;
1106	case 'revision' : // just revisions - remove autosave later
1107	case 'all' :
1108	default :
1109	if ( !$revisions = wp_get_post_revisions( $post->ID ) )
1110	return;
1111	break;
1112	}
1113
1114	$titlef = _c( '%1$s by %2$s\|post revision 1:datetime, 2:name' );
1115
1116	if ( $parent )
1117	array_unshift( $revisions, $post );
1118
1119	$rows = '';
1120	$class = false;
1121	$can_edit_post = current_user_can( 'edit_post', $post->ID );
1122	foreach ( $revisions as $revision ) {
1123	if ( !current_user_can( 'read_post', $revision->ID ) )
1124	continue;
1125	if ( 'revision' === $type && wp_is_post_autosave( $revision ) )
1126	continue;
1127
1128	$date = wp_post_revision_title( $revision );
1129	$name = get_author_name( $revision->post_author );
1130
1131	if ( 'form-table' == $format ) {
1132	if ( $left )
1133	$left_checked = $left == $revision->ID ? ' checked="checked"' : '';
1134	else
1135	$left_checked = $right_checked ? ' checked="checked"' : ''; // [sic] (the next one)
1136	$right_checked = $right == $revision->ID ? ' checked="checked"' : '';
1137
1138	$class = $class ? '' : " class='alternate'";
1139
1140	if ( $post->ID != $revision->ID && $can_edit_post )
1141	$actions = '<a href="' . wp_nonce_url( add_query_arg( array( 'revision' => $revision->ID, 'diff' => false, 'action' => 'restore' ) ), "restore-post_$post->ID\|$revision->ID" ) . '">' . __( 'Restore' ) . '</a>';
1142	else
1143	$actions = '';
1144
1145	$rows .= "<tr$class>\n";
1146	$rows .= "\t<th style='white-space: nowrap' scope='row'><input type='radio' name='left' value='$revision->ID'$left_checked /><input type='radio' name='right' value='$revision->ID'$right_checked /></th>\n";
1147	$rows .= "\t<td>$date</td>\n";
1148	$rows .= "\t<td>$name</td>\n";
1149	$rows .= "\t<td class='action-links'>$actions</td>\n";
1150	$rows .= "</tr>\n";
1151	} else {
1152	$title = sprintf( $titlef, $date, $name );
1153	$rows .= "\t<li>$title</li>\n";
1154	}
1155	}
1156
1157	if ( 'form-table' == $format ) : ?>
1158
1159	<form action="revision.php" method="get">
1160
1161	<div class="tablenav">
1162	<div class="alignleft">
1163	<input type="submit" class="button-secondary" value="<?php _e( 'Compare Revisions' ); ?>" />
1164	<input type="hidden" name="action" value="diff" />
1165	</div>
1166	</div>
1167
1168	<br class="clear" />
1169
1170	<table class="widefat post-revisions" cellspacing="0">
1171	<col />
1172	<col style="width: 33%" />
1173	<col style="width: 33%" />
1174	<col style="width: 33%" />
1175	<thead>
1176	<tr>
1177	<th scope="col"></th>
1178	<th scope="col"><?php _e( 'Date Created' ); ?></th>
1179	<th scope="col"><?php _e( 'Author' ); ?></th>
1180	<th scope="col" class="action-links"><?php _e( 'Actions' ); ?></th>
1181	</tr>
1182	</thead>
1183	<tbody>
1184
1185	<?php echo $rows; ?>
1186
1187	</tbody>
1188	</table>
1189
1190	</form>
1191
1192	<?php
1193	else :
1194	echo "<ul class='post-revisions'>\n";
1195	echo $rows;
1196	echo "</ul>";
1197	endif;
1198
1199	}

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Ticket #9472: post-template.php

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