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Ticket #43037: user.php

File user.php, 94.9 KB (added by zalak151291, 7 years ago)

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1	<?php
2	/**
3	* Core User API
4	*
5	* @package WordPress
6	* @subpackage Users
7	*/
8
9	/**
10	* Authenticates and logs a user in with 'remember' capability.
11	*
12	* The credentials is an array that has 'user_login', 'user_password', and
13	* 'remember' indices. If the credentials is not given, then the log in form
14	* will be assumed and used if set.
15	*
16	* The various authentication cookies will be set by this function and will be
17	* set for a longer period depending on if the 'remember' credential is set to
18	* true.
19	*
20	* Note: wp_signon() doesn't handle setting the current user. This means that if the
21	* function is called before the {@see 'init'} hook is fired, is_user_logged_in() will
22	* evaluate as false until that point. If is_user_logged_in() is needed in conjunction
23	* with wp_signon(), wp_set_current_user() should be called explicitly.
24	*
25	* @since 2.5.0
26	*
27	* @global string $auth_secure_cookie
28	*
29	* @param array $credentials Optional. User info in order to sign on.
30	* @param string\|bool $secure_cookie Optional. Whether to use secure cookie.
31	* @return WP_User\|WP_Error WP_User on success, WP_Error on failure.
32	*/
33	function wp_signon( $credentials = array(), $secure_cookie = '' ) {
34	if ( empty( $credentials ) ) {
35	$credentials = array(); // Back-compat for plugins passing an empty string.
36
37	if ( ! empty( $_POST['log'] ) ) {
38	$credentials['user_login'] = $_POST['log'];
39	}
40	if ( ! empty( $_POST['pwd'] ) ) {
41	$credentials['user_password'] = $_POST['pwd'];
42	}
43	if ( ! empty( $_POST['rememberme'] ) ) {
44	$credentials['remember'] = $_POST['rememberme'];
45	}
46	}
47
48	if ( ! empty( $credentials['remember'] ) ) {
49	$credentials['remember'] = true;
50	} else {
51	$credentials['remember'] = false;
52	}
53
54	/**
55	* Fires before the user is authenticated.
56	*
57	* The variables passed to the callbacks are passed by reference,
58	* and can be modified by callback functions.
59	*
60	* @since 1.5.1
61	*
62	* @todo Decide whether to deprecate the wp_authenticate action.
63	*
64	* @param string $user_login Username (passed by reference).
65	* @param string $user_password User password (passed by reference).
66	*/
67	do_action_ref_array( 'wp_authenticate', array( &$credentials['user_login'], &$credentials['user_password'] ) );
68
69	if ( '' === $secure_cookie ) {
70	$secure_cookie = is_ssl();
71	}
72
73	/**
74	* Filters whether to use a secure sign-on cookie.
75	*
76	* @since 3.1.0
77	*
78	* @param bool $secure_cookie Whether to use a secure sign-on cookie.
79	* @param array $credentials {
80	* Array of entered sign-on data.
81	*
82	* @type string $user_login Username.
83	* @type string $user_password Password entered.
84	* @type bool $remember Whether to 'remember' the user. Increases the time
85	* that the cookie will be kept. Default false.
86	* }
87	*/
88	$secure_cookie = apply_filters( 'secure_signon_cookie', $secure_cookie, $credentials );
89
90	global $auth_secure_cookie; // XXX ugly hack to pass this to wp_authenticate_cookie
91	$auth_secure_cookie = $secure_cookie;
92
93	add_filter( 'authenticate', 'wp_authenticate_cookie', 30, 3 );
94
95	$user = wp_authenticate( $credentials['user_login'], $credentials['user_password'] );
96
97	if ( is_wp_error( $user ) ) {
98	if ( $user->get_error_codes() == array( 'empty_username', 'empty_password' ) ) {
99	$user = new WP_Error( '', '' );
100	}
101
102	return $user;
103	}
104
105	wp_set_auth_cookie( $user->ID, $credentials['remember'], $secure_cookie );
106	/**
107	* Fires after the user has successfully logged in.
108	*
109	* @since 1.5.0
110	*
111	* @param string $user_login Username.
112	* @param WP_User $user WP_User object of the logged-in user.
113	*/
114	do_action( 'wp_login', $user->user_login, $user );
115	return $user;
116	}
117
118	/**
119	* Authenticate a user, confirming the username and password are valid.
120	*
121	* @since 2.8.0
122	*
123	* @param WP_User\|WP_Error\|null $user WP_User or WP_Error object from a previous callback. Default null.
124	* @param string $username Username for authentication.
125	* @param string $password Password for authentication.
126	* @return WP_User\|WP_Error WP_User on success, WP_Error on failure.
127	*/
128	function wp_authenticate_username_password( $user, $username, $password ) {
129	if ( $user instanceof WP_User ) {
130	return $user;
131	}
132
133	if ( empty( $username ) \|\| empty( $password ) ) {
134	if ( is_wp_error( $user ) ) {
135	return $user;
136	}
137
138	$error = new WP_Error();
139
140	if ( empty( $username ) ) {
141	$error->add( 'empty_username', __( '<strong>ERROR</strong>: The username field is empty.' ) );
142	}
143
144	if ( empty( $password ) ) {
145	$error->add( 'empty_password', __( '<strong>ERROR</strong>: The password field is empty.' ) );
146	}
147
148	return $error;
149	}
150
151	$user = get_user_by( 'login', $username );
152
153	if ( ! $user ) {
154	return new WP_Error(
155	'invalid_username',
156	__( '<strong>ERROR</strong>: Invalid username.' ) .
157	' <a href="' . wp_lostpassword_url() . '">' .
158	__( 'Recover username..' ) .
159	'</a>'
160	);
161	}
162
163	/**
164	* Filters whether the given user can be authenticated with the provided $password.
165	*
166	* @since 2.5.0
167	*
168	* @param WP_User\|WP_Error $user WP_User or WP_Error object if a previous
169	* callback failed authentication.
170	* @param string $password Password to check against the user.
171	*/
172	$user = apply_filters( 'wp_authenticate_user', $user, $password );
173	if ( is_wp_error( $user ) ) {
174	return $user;
175	}
176
177	if ( ! wp_check_password( $password, $user->user_pass, $user->ID ) ) {
178	return new WP_Error(
179	'incorrect_password',
180	sprintf(
181	/* translators: %s: user name */
182	__( '<strong>ERROR</strong>: The password you entered for the username %s is incorrect.' ),
183	'<strong>' . $username . '</strong>'
184	) .
185	' <a href="' . wp_lostpassword_url() . '">' .
186	__( 'Lost your password?' ) .
187	'</a>'
188	);
189	}
190
191	return $user;
192	}
193
194	/**
195	* Authenticates a user using the email and password.
196	*
197	* @since 4.5.0
198	*
199	* @param WP_User\|WP_Error\|null $user WP_User or WP_Error object if a previous
200	* callback failed authentication.
201	* @param string $email Email address for authentication.
202	* @param string $password Password for authentication.
203	* @return WP_User\|WP_Error WP_User on success, WP_Error on failure.
204	*/
205	function wp_authenticate_email_password( $user, $email, $password ) {
206	if ( $user instanceof WP_User ) {
207	return $user;
208	}
209
210	if ( empty( $email ) \|\| empty( $password ) ) {
211	if ( is_wp_error( $user ) ) {
212	return $user;
213	}
214
215	$error = new WP_Error();
216
217	if ( empty( $email ) ) {
218	$error->add( 'empty_username', __( '<strong>ERROR</strong>: The email field is empty.' ) ); // Uses 'empty_username' for back-compat with wp_signon()
219	}
220
221	if ( empty( $password ) ) {
222	$error->add( 'empty_password', __( '<strong>ERROR</strong>: The password field is empty.' ) );
223	}
224
225	return $error;
226	}
227
228	if ( ! is_email( $email ) ) {
229	return $user;
230	}
231
232	$user = get_user_by( 'email', $email );
233
234	if ( ! $user ) {
235	return new WP_Error(
236	'invalid_email',
237	__( '<strong>ERROR</strong>: Invalid email address.' ) .
238	' <a href="' . wp_lostpassword_url() . '">' .
239	__( 'Recover account email address..' ) .
240	'</a>'
241	);
242	}
243
244	/** This filter is documented in wp-includes/user.php */
245	$user = apply_filters( 'wp_authenticate_user', $user, $password );
246
247	if ( is_wp_error( $user ) ) {
248	return $user;
249	}
250
251	if ( ! wp_check_password( $password, $user->user_pass, $user->ID ) ) {
252	return new WP_Error(
253	'incorrect_password',
254	sprintf(
255	/* translators: %s: email address */
256	__( '<strong>ERROR</strong>: The password you entered for the email address %s is incorrect.' ),
257	'<strong>' . $email . '</strong>'
258	) .
259	' <a href="' . wp_lostpassword_url() . '">' .
260	__( 'Lost your password?' ) .
261	'</a>'
262	);
263	}
264
265	return $user;
266	}
267
268	/**
269	* Authenticate the user using the WordPress auth cookie.
270	*
271	* @since 2.8.0
272	*
273	* @global string $auth_secure_cookie
274	*
275	* @param WP_User\|WP_Error\|null $user WP_User or WP_Error object from a previous callback. Default null.
276	* @param string $username Username. If not empty, cancels the cookie authentication.
277	* @param string $password Password. If not empty, cancels the cookie authentication.
278	* @return WP_User\|WP_Error WP_User on success, WP_Error on failure.
279	*/
280	function wp_authenticate_cookie( $user, $username, $password ) {
281	if ( $user instanceof WP_User ) {
282	return $user;
283	}
284
285	if ( empty( $username ) && empty( $password ) ) {
286	$user_id = wp_validate_auth_cookie();
287	if ( $user_id ) {
288	return new WP_User( $user_id );
289	}
290
291	global $auth_secure_cookie;
292
293	if ( $auth_secure_cookie ) {
294	$auth_cookie = SECURE_AUTH_COOKIE;
295	} else {
296	$auth_cookie = AUTH_COOKIE;
297	}
298
299	if ( ! empty( $_COOKIE[ $auth_cookie ] ) ) {
300	return new WP_Error( 'expired_session', __( 'Please log in again.' ) );
301	}
302
303	// If the cookie is not set, be silent.
304	}
305
306	return $user;
307	}
308
309	/**
310	* For Multisite blogs, check if the authenticated user has been marked as a
311	* spammer, or if the user's primary blog has been marked as spam.
312	*
313	* @since 3.7.0
314	*
315	* @param WP_User\|WP_Error\|null $user WP_User or WP_Error object from a previous callback. Default null.
316	* @return WP_User\|WP_Error WP_User on success, WP_Error if the user is considered a spammer.
317	*/
318	function wp_authenticate_spam_check( $user ) {
319	if ( $user instanceof WP_User && is_multisite() ) {
320	/**
321	* Filters whether the user has been marked as a spammer.
322	*
323	* @since 3.7.0
324	*
325	* @param bool $spammed Whether the user is considered a spammer.
326	* @param WP_User $user User to check against.
327	*/
328	$spammed = apply_filters( 'check_is_user_spammed', is_user_spammy( $user ), $user );
329
330	if ( $spammed ) {
331	return new WP_Error( 'spammer_account', __( '<strong>ERROR</strong>: Your account has been marked as a spammer.' ) );
332	}
333	}
334	return $user;
335	}
336
337	/**
338	* Validates the logged-in cookie.
339	*
340	* Checks the logged-in cookie if the previous auth cookie could not be
341	* validated and parsed.
342	*
343	* This is a callback for the {@see 'determine_current_user'} filter, rather than API.
344	*
345	* @since 3.9.0
346	*
347	* @param int\|bool $user_id The user ID (or false) as received from the
348	* determine_current_user filter.
349	* @return int\|false User ID if validated, false otherwise. If a user ID from
350	* an earlier filter callback is received, that value is returned.
351	*/
352	function wp_validate_logged_in_cookie( $user_id ) {
353	if ( $user_id ) {
354	return $user_id;
355	}
356
357	if ( is_blog_admin() \|\| is_network_admin() \|\| empty( $_COOKIE[ LOGGED_IN_COOKIE ] ) ) {
358	return false;
359	}
360
361	return wp_validate_auth_cookie( $_COOKIE[ LOGGED_IN_COOKIE ], 'logged_in' );
362	}
363
364	/**
365	* Number of posts user has written.
366	*
367	* @since 3.0.0
368	* @since 4.1.0 Added `$post_type` argument.
369	* @since 4.3.0 Added `$public_only` argument. Added the ability to pass an array
370	* of post types to `$post_type`.
371	*
372	* @global wpdb $wpdb WordPress database abstraction object.
373	*
374	* @param int $userid User ID.
375	* @param array\|string $post_type Optional. Single post type or array of post types to count the number of posts for. Default 'post'.
376	* @param bool $public_only Optional. Whether to only return counts for public posts. Default false.
377	* @return string Number of posts the user has written in this post type.
378	*/
379	function count_user_posts( $userid, $post_type = 'post', $public_only = false ) {
380	global $wpdb;
381
382	$where = get_posts_by_author_sql( $post_type, true, $userid, $public_only );
383
384	$count = $wpdb->get_var( "SELECT COUNT(*) FROM $wpdb->posts $where" );
385
386	/**
387	* Filters the number of posts a user has written.
388	*
389	* @since 2.7.0
390	* @since 4.1.0 Added `$post_type` argument.
391	* @since 4.3.1 Added `$public_only` argument.
392	*
393	* @param int $count The user's post count.
394	* @param int $userid User ID.
395	* @param string\|array $post_type Single post type or array of post types to count the number of posts for.
396	* @param bool $public_only Whether to limit counted posts to public posts.
397	*/
398	return apply_filters( 'get_usernumposts', $count, $userid, $post_type, $public_only );
399	}
400
401	/**
402	* Number of posts written by a list of users.
403	*
404	* @since 3.0.0
405	*
406	* @global wpdb $wpdb WordPress database abstraction object.
407	*
408	* @param array $users Array of user IDs.
409	* @param string\|array $post_type Optional. Single post type or array of post types to check. Defaults to 'post'.
410	* @param bool $public_only Optional. Only return counts for public posts. Defaults to false.
411	* @return array Amount of posts each user has written.
412	*/
413	function count_many_users_posts( $users, $post_type = 'post', $public_only = false ) {
414	global $wpdb;
415
416	$count = array();
417	if ( empty( $users ) \|\| ! is_array( $users ) ) {
418	return $count;
419	}
420
421	$userlist = implode( ',', array_map( 'absint', $users ) );
422	$where = get_posts_by_author_sql( $post_type, true, null, $public_only );
423
424	$result = $wpdb->get_results( "SELECT post_author, COUNT(*) FROM $wpdb->posts $where AND post_author IN ($userlist) GROUP BY post_author", ARRAY_N );
425	foreach ( $result as $row ) {
426	$count[ $row[0] ] = $row[1];
427	}
428
429	foreach ( $users as $id ) {
430	if ( ! isset( $count[ $id ] ) ) {
431	$count[ $id ] = 0;
432	}
433	}
434
435	return $count;
436	}
437
438	//
439	// User option functions
440	//
441
442	/**
443	* Get the current user's ID
444	*
445	* @since MU (3.0.0)
446	*
447	* @return int The current user's ID, or 0 if no user is logged in.
448	*/
449	function get_current_user_id() {
450	if ( ! function_exists( 'wp_get_current_user' ) ) {
451	return 0;
452	}
453	$user = wp_get_current_user();
454	return ( isset( $user->ID ) ? (int) $user->ID : 0 );
455	}
456
457	/**
458	* Retrieve user option that can be either per Site or per Network.
459	*
460	* If the user ID is not given, then the current user will be used instead. If
461	* the user ID is given, then the user data will be retrieved. The filter for
462	* the result, will also pass the original option name and finally the user data
463	* object as the third parameter.
464	*
465	* The option will first check for the per site name and then the per Network name.
466	*
467	* @since 2.0.0
468	*
469	* @global wpdb $wpdb WordPress database abstraction object.
470	*
471	* @param string $option User option name.
472	* @param int $user Optional. User ID.
473	* @param string $deprecated Use get_option() to check for an option in the options table.
474	* @return mixed User option value on success, false on failure.
475	*/
476	function get_user_option( $option, $user = 0, $deprecated = '' ) {
477	global $wpdb;
478
479	if ( ! empty( $deprecated ) ) {
480	_deprecated_argument( __FUNCTION__, '3.0.0' );
481	}
482
483	if ( empty( $user ) ) {
484	$user = get_current_user_id();
485	}
486
487	if ( ! $user = get_userdata( $user ) ) {
488	return false;
489	}
490
491	$prefix = $wpdb->get_blog_prefix();
492	if ( $user->has_prop( $prefix . $option ) ) { // Blog specific
493	$result = $user->get( $prefix . $option );
494	} elseif ( $user->has_prop( $option ) ) { // User specific and cross-blog
495	$result = $user->get( $option );
496	} else {
497	$result = false;
498	}
499
500	/**
501	* Filters a specific user option value.
502	*
503	* The dynamic portion of the hook name, `$option`, refers to the user option name.
504	*
505	* @since 2.5.0
506	*
507	* @param mixed $result Value for the user's option.
508	* @param string $option Name of the option being retrieved.
509	* @param WP_User $user WP_User object of the user whose option is being retrieved.
510	*/
511	return apply_filters( "get_user_option_{$option}", $result, $option, $user );
512	}
513
514	/**
515	* Update user option with global blog capability.
516	*
517	* User options are just like user metadata except that they have support for
518	* global blog options. If the 'global' parameter is false, which it is by default
519	* it will prepend the WordPress table prefix to the option name.
520	*
521	* Deletes the user option if $newvalue is empty.
522	*
523	* @since 2.0.0
524	*
525	* @global wpdb $wpdb WordPress database abstraction object.
526	*
527	* @param int $user_id User ID.
528	* @param string $option_name User option name.
529	* @param mixed $newvalue User option value.
530	* @param bool $global Optional. Whether option name is global or blog specific.
531	* Default false (blog specific).
532	* @return int\|bool User meta ID if the option didn't exist, true on successful update,
533	* false on failure.
534	*/
535	function update_user_option( $user_id, $option_name, $newvalue, $global = false ) {
536	global $wpdb;
537
538	if ( ! $global ) {
539	$option_name = $wpdb->get_blog_prefix() . $option_name;
540	}
541
542	return update_user_meta( $user_id, $option_name, $newvalue );
543	}
544
545	/**
546	* Delete user option with global blog capability.
547	*
548	* User options are just like user metadata except that they have support for
549	* global blog options. If the 'global' parameter is false, which it is by default
550	* it will prepend the WordPress table prefix to the option name.
551	*
552	* @since 3.0.0
553	*
554	* @global wpdb $wpdb WordPress database abstraction object.
555	*
556	* @param int $user_id User ID
557	* @param string $option_name User option name.
558	* @param bool $global Optional. Whether option name is global or blog specific.
559	* Default false (blog specific).
560	* @return bool True on success, false on failure.
561	*/
562	function delete_user_option( $user_id, $option_name, $global = false ) {
563	global $wpdb;
564
565	if ( ! $global ) {
566	$option_name = $wpdb->get_blog_prefix() . $option_name;
567	}
568	return delete_user_meta( $user_id, $option_name );
569	}
570
571	/**
572	* Retrieve list of users matching criteria.
573	*
574	* @since 3.1.0
575	*
576	* @see WP_User_Query
577	*
578	* @param array $args Optional. Arguments to retrieve users. See WP_User_Query::prepare_query().
579	* for more information on accepted arguments.
580	* @return array List of users.
581	*/
582	function get_users( $args = array() ) {
583
584	$args = wp_parse_args( $args );
585	$args['count_total'] = false;
586
587	$user_search = new WP_User_Query( $args );
588
589	return (array) $user_search->get_results();
590	}
591
592	/**
593	* Get the sites a user belongs to.
594	*
595	* @since 3.0.0
596	* @since 4.7.0 Converted to use get_sites().
597	*
598	* @global wpdb $wpdb WordPress database abstraction object.
599	*
600	* @param int $user_id User ID
601	* @param bool $all Whether to retrieve all sites, or only sites that are not
602	* marked as deleted, archived, or spam.
603	* @return array A list of the user's sites. An empty array if the user doesn't exist
604	* or belongs to no sites.
605	*/
606	function get_blogs_of_user( $user_id, $all = false ) {
607	global $wpdb;
608
609	$user_id = (int) $user_id;
610
611	// Logged out users can't have sites
612	if ( empty( $user_id ) ) {
613	return array();
614	}
615
616	/**
617	* Filters the list of a user's sites before it is populated.
618	*
619	* Passing a non-null value to the filter will effectively short circuit
620	* get_blogs_of_user(), returning that value instead.
621	*
622	* @since 4.6.0
623	*
624	* @param null\|array $sites An array of site objects of which the user is a member.
625	* @param int $user_id User ID.
626	* @param bool $all Whether the returned array should contain all sites, including
627	* those marked 'deleted', 'archived', or 'spam'. Default false.
628	*/
629	$sites = apply_filters( 'pre_get_blogs_of_user', null, $user_id, $all );
630
631	if ( null !== $sites ) {
632	return $sites;
633	}
634
635	$keys = get_user_meta( $user_id );
636	if ( empty( $keys ) ) {
637	return array();
638	}
639
640	if ( ! is_multisite() ) {
641	$site_id = get_current_blog_id();
642	$sites = array( $site_id => new stdClass );
643	$sites[ $site_id ]->userblog_id = $site_id;
644	$sites[ $site_id ]->blogname = get_option( 'blogname' );
645	$sites[ $site_id ]->domain = '';
646	$sites[ $site_id ]->path = '';
647	$sites[ $site_id ]->site_id = 1;
648	$sites[ $site_id ]->siteurl = get_option( 'siteurl' );
649	$sites[ $site_id ]->archived = 0;
650	$sites[ $site_id ]->spam = 0;
651	$sites[ $site_id ]->deleted = 0;
652	return $sites;
653	}
654
655	$site_ids = array();
656
657	if ( isset( $keys[ $wpdb->base_prefix . 'capabilities' ] ) && defined( 'MULTISITE' ) ) {
658	$site_ids[] = 1;
659	unset( $keys[ $wpdb->base_prefix . 'capabilities' ] );
660	}
661
662	$keys = array_keys( $keys );
663
664	foreach ( $keys as $key ) {
665	if ( 'capabilities' !== substr( $key, -12 ) ) {
666	continue;
667	}
668	if ( $wpdb->base_prefix && 0 !== strpos( $key, $wpdb->base_prefix ) ) {
669	continue;
670	}
671	$site_id = str_replace( array( $wpdb->base_prefix, '_capabilities' ), '', $key );
672	if ( ! is_numeric( $site_id ) ) {
673	continue;
674	}
675
676	$site_ids[] = (int) $site_id;
677	}
678
679	$sites = array();
680
681	if ( ! empty( $site_ids ) ) {
682	$args = array(
683	'number' => '',
684	'site__in' => $site_ids,
685	);
686	if ( ! $all ) {
687	$args['archived'] = 0;
688	$args['spam'] = 0;
689	$args['deleted'] = 0;
690	}
691
692	$_sites = get_sites( $args );
693
694	foreach ( $_sites as $site ) {
695	$sites[ $site->id ] = (object) array(
696	'userblog_id' => $site->id,
697	'blogname' => $site->blogname,
698	'domain' => $site->domain,
699	'path' => $site->path,
700	'site_id' => $site->network_id,
701	'siteurl' => $site->siteurl,
702	'archived' => $site->archived,
703	'mature' => $site->mature,
704	'spam' => $site->spam,
705	'deleted' => $site->deleted,
706	);
707	}
708	}
709
710	/**
711	* Filters the list of sites a user belongs to.
712	*
713	* @since MU (3.0.0)
714	*
715	* @param array $sites An array of site objects belonging to the user.
716	* @param int $user_id User ID.
717	* @param bool $all Whether the returned sites array should contain all sites, including
718	* those marked 'deleted', 'archived', or 'spam'. Default false.
719	*/
720	return apply_filters( 'get_blogs_of_user', $sites, $user_id, $all );
721	}
722
723	/**
724	* Find out whether a user is a member of a given blog.
725	*
726	* @since MU (3.0.0)
727	*
728	* @global wpdb $wpdb WordPress database abstraction object.
729	*
730	* @param int $user_id Optional. The unique ID of the user. Defaults to the current user.
731	* @param int $blog_id Optional. ID of the blog to check. Defaults to the current site.
732	* @return bool
733	*/
734	function is_user_member_of_blog( $user_id = 0, $blog_id = 0 ) {
735	global $wpdb;
736
737	$user_id = (int) $user_id;
738	$blog_id = (int) $blog_id;
739
740	if ( empty( $user_id ) ) {
741	$user_id = get_current_user_id();
742	}
743
744	// Technically not needed, but does save calls to get_site and get_user_meta
745	// in the event that the function is called when a user isn't logged in
746	if ( empty( $user_id ) ) {
747	return false;
748	} else {
749	$user = get_userdata( $user_id );
750	if ( ! $user instanceof WP_User ) {
751	return false;
752	}
753	}
754
755	if ( ! is_multisite() ) {
756	return true;
757	}
758
759	if ( empty( $blog_id ) ) {
760	$blog_id = get_current_blog_id();
761	}
762
763	$blog = get_site( $blog_id );
764
765	if ( ! $blog \|\| ! isset( $blog->domain ) \|\| $blog->archived \|\| $blog->spam \|\| $blog->deleted ) {
766	return false;
767	}
768
769	$keys = get_user_meta( $user_id );
770	if ( empty( $keys ) ) {
771	return false;
772	}
773
774	// no underscore before capabilities in $base_capabilities_key
775	$base_capabilities_key = $wpdb->base_prefix . 'capabilities';
776	$site_capabilities_key = $wpdb->base_prefix . $blog_id . '_capabilities';
777
778	if ( isset( $keys[ $base_capabilities_key ] ) && $blog_id == 1 ) {
779	return true;
780	}
781
782	if ( isset( $keys[ $site_capabilities_key ] ) ) {
783	return true;
784	}
785
786	return false;
787	}
788
789	/**
790	* Adds meta data to a user.
791	*
792	* @since 3.0.0
793	*
794	* @param int $user_id User ID.
795	* @param string $meta_key Metadata name.
796	* @param mixed $meta_value Metadata value.
797	* @param bool $unique Optional. Whether the same key should not be added. Default false.
798	* @return int\|false Meta ID on success, false on failure.
799	*/
800	function add_user_meta( $user_id, $meta_key, $meta_value, $unique = false ) {
801	return add_metadata( 'user', $user_id, $meta_key, $meta_value, $unique );
802	}
803
804	/**
805	* Remove metadata matching criteria from a user.
806	*
807	* You can match based on the key, or key and value. Removing based on key and
808	* value, will keep from removing duplicate metadata with the same key. It also
809	* allows removing all metadata matching key, if needed.
810	*
811	* @since 3.0.0
812	* @link https://codex.wordpress.org/Function_Reference/delete_user_meta
813	*
814	* @param int $user_id User ID
815	* @param string $meta_key Metadata name.
816	* @param mixed $meta_value Optional. Metadata value.
817	* @return bool True on success, false on failure.
818	*/
819	function delete_user_meta( $user_id, $meta_key, $meta_value = '' ) {
820	return delete_metadata( 'user', $user_id, $meta_key, $meta_value );
821	}
822
823	/**
824	* Retrieve user meta field for a user.
825	*
826	* @since 3.0.0
827	* @link https://codex.wordpress.org/Function_Reference/get_user_meta
828	*
829	* @param int $user_id User ID.
830	* @param string $key Optional. The meta key to retrieve. By default, returns data for all keys.
831	* @param bool $single Whether to return a single value.
832	* @return mixed Will be an array if $single is false. Will be value of meta data field if $single is true.
833	*/
834	function get_user_meta( $user_id, $key = '', $single = false ) {
835	return get_metadata( 'user', $user_id, $key, $single );
836	}
837
838	/**
839	* Update user meta field based on user ID.
840	*
841	* Use the $prev_value parameter to differentiate between meta fields with the
842	* same key and user ID.
843	*
844	* If the meta field for the user does not exist, it will be added.
845	*
846	* @since 3.0.0
847	* @link https://codex.wordpress.org/Function_Reference/update_user_meta
848	*
849	* @param int $user_id User ID.
850	* @param string $meta_key Metadata key.
851	* @param mixed $meta_value Metadata value.
852	* @param mixed $prev_value Optional. Previous value to check before removing.
853	* @return int\|bool Meta ID if the key didn't exist, true on successful update, false on failure.
854	*/
855	function update_user_meta( $user_id, $meta_key, $meta_value, $prev_value = '' ) {
856	return update_metadata( 'user', $user_id, $meta_key, $meta_value, $prev_value );
857	}
858
859	/**
860	* Count number of users who have each of the user roles.
861	*
862	* Assumes there are neither duplicated nor orphaned capabilities meta_values.
863	* Assumes role names are unique phrases. Same assumption made by WP_User_Query::prepare_query()
864	* Using $strategy = 'time' this is CPU-intensive and should handle around 10^7 users.
865	* Using $strategy = 'memory' this is memory-intensive and should handle around 10^5 users, but see WP Bug #12257.
866	*
867	* @since 3.0.0
868	* @since 4.4.0 The number of users with no role is now included in the `none` element.
869	* @since 4.9.0 The `$site_id` parameter was added to support multisite.
870	*
871	* @global wpdb $wpdb WordPress database abstraction object.
872	*
873	* @param string $strategy Optional. The computational strategy to use when counting the users.
874	* Accepts either 'time' or 'memory'. Default 'time'.
875	* @param int\|null $site_id Optional. The site ID to count users for. Defaults to the current site.
876	* @return array Includes a grand total and an array of counts indexed by role strings.
877	*/
878	function count_users( $strategy = 'time', $site_id = null ) {
879	global $wpdb;
880
881	// Initialize
882	if ( ! $site_id ) {
883	$site_id = get_current_blog_id();
884	}
885	$blog_prefix = $wpdb->get_blog_prefix( $site_id );
886	$result = array();
887
888	if ( 'time' == $strategy ) {
889	if ( is_multisite() && $site_id != get_current_blog_id() ) {
890	switch_to_blog( $site_id );
891	$avail_roles = wp_roles()->get_names();
892	restore_current_blog();
893	} else {
894	$avail_roles = wp_roles()->get_names();
895	}
896
897	// Build a CPU-intensive query that will return concise information.
898	$select_count = array();
899	foreach ( $avail_roles as $this_role => $name ) {
900	$select_count[] = $wpdb->prepare( 'COUNT(NULLIF(`meta_value` LIKE %s, false))', '%' . $wpdb->esc_like( '"' . $this_role . '"' ) . '%' );
901	}
902	$select_count[] = "COUNT(NULLIF(`meta_value` = 'a:0:{}', false))";
903	$select_count = implode( ', ', $select_count );
904
905	// Add the meta_value index to the selection list, then run the query.
906	$row = $wpdb->get_row(
907	"
908	SELECT {$select_count}, COUNT(*)
909	FROM {$wpdb->usermeta}
910	INNER JOIN {$wpdb->users} ON user_id = ID
911	WHERE meta_key = '{$blog_prefix}capabilities'
912	", ARRAY_N
913	);
914
915	// Run the previous loop again to associate results with role names.
916	$col = 0;
917	$role_counts = array();
918	foreach ( $avail_roles as $this_role => $name ) {
919	$count = (int) $row[ $col++ ];
920	if ( $count > 0 ) {
921	$role_counts[ $this_role ] = $count;
922	}
923	}
924
925	$role_counts['none'] = (int) $row[ $col++ ];
926
927	// Get the meta_value index from the end of the result set.
928	$total_users = (int) $row[ $col ];
929
930	$result['total_users'] = $total_users;
931	$result['avail_roles'] =& $role_counts;
932	} else {
933	$avail_roles = array(
934	'none' => 0,
935	);
936
937	$users_of_blog = $wpdb->get_col(
938	"
939	SELECT meta_value
940	FROM {$wpdb->usermeta}
941	INNER JOIN {$wpdb->users} ON user_id = ID
942	WHERE meta_key = '{$blog_prefix}capabilities'
943	"
944	);
945
946	foreach ( $users_of_blog as $caps_meta ) {
947	$b_roles = maybe_unserialize( $caps_meta );
948	if ( ! is_array( $b_roles ) ) {
949	continue;
950	}
951	if ( empty( $b_roles ) ) {
952	$avail_roles['none']++;
953	}
954	foreach ( $b_roles as $b_role => $val ) {
955	if ( isset( $avail_roles[ $b_role ] ) ) {
956	$avail_roles[ $b_role ]++;
957	} else {
958	$avail_roles[ $b_role ] = 1;
959	}
960	}
961	}
962
963	$result['total_users'] = count( $users_of_blog );
964	$result['avail_roles'] =& $avail_roles;
965	}
966
967	return $result;
968	}
969
970	//
971	// Private helper functions
972	//
973
974	/**
975	* Set up global user vars.
976	*
977	* Used by wp_set_current_user() for back compat. Might be deprecated in the future.
978	*
979	* @since 2.0.4
980	*
981	* @global string $user_login The user username for logging in
982	* @global WP_User $userdata User data.
983	* @global int $user_level The level of the user
984	* @global int $user_ID The ID of the user
985	* @global string $user_email The email address of the user
986	* @global string $user_url The url in the user's profile
987	* @global string $user_identity The display name of the user
988	*
989	* @param int $for_user_id Optional. User ID to set up global data.
990	*/
991	function setup_userdata( $for_user_id = '' ) {
992	global $user_login, $userdata, $user_level, $user_ID, $user_email, $user_url, $user_identity;
993
994	if ( '' == $for_user_id ) {
995	$for_user_id = get_current_user_id();
996	}
997	$user = get_userdata( $for_user_id );
998
999	if ( ! $user ) {
1000	$user_ID = 0;
1001	$user_level = 0;
1002	$userdata = null;
1003	$user_login = $user_email = $user_url = $user_identity = '';
1004	return;
1005	}
1006
1007	$user_ID = (int) $user->ID;
1008	$user_level = (int) $user->user_level;
1009	$userdata = $user;
1010	$user_login = $user->user_login;
1011	$user_email = $user->user_email;
1012	$user_url = $user->user_url;
1013	$user_identity = $user->display_name;
1014	}
1015
1016	/**
1017	* Create dropdown HTML content of users.
1018	*
1019	* The content can either be displayed, which it is by default or retrieved by
1020	* setting the 'echo' argument. The 'include' and 'exclude' arguments do not
1021	* need to be used; all users will be displayed in that case. Only one can be
1022	* used, either 'include' or 'exclude', but not both.
1023	*
1024	* The available arguments are as follows:
1025	*
1026	* @since 2.3.0
1027	* @since 4.5.0 Added the 'display_name_with_login' value for 'show'.
1028	* @since 4.7.0 Added the `$role`, `$role__in`, and `$role__not_in` parameters.
1029	*
1030	* @param array\|string $args {
1031	* Optional. Array or string of arguments to generate a drop-down of users.
1032	* See WP_User_Query::prepare_query() for additional available arguments.
1033	*
1034	* @type string $show_option_all Text to show as the drop-down default (all).
1035	* Default empty.
1036	* @type string $show_option_none Text to show as the drop-down default when no
1037	* users were found. Default empty.
1038	* @type int\|string $option_none_value Value to use for $show_option_non when no users
1039	* were found. Default -1.
1040	* @type string $hide_if_only_one_author Whether to skip generating the drop-down
1041	* if only one user was found. Default empty.
1042	* @type string $orderby Field to order found users by. Accepts user fields.
1043	* Default 'display_name'.
1044	* @type string $order Whether to order users in ascending or descending
1045	* order. Accepts 'ASC' (ascending) or 'DESC' (descending).
1046	* Default 'ASC'.
1047	* @type array\|string $include Array or comma-separated list of user IDs to include.
1048	* Default empty.
1049	* @type array\|string $exclude Array or comma-separated list of user IDs to exclude.
1050	* Default empty.
1051	* @type bool\|int $multi Whether to skip the ID attribute on the 'select' element.
1052	* Accepts 1\|true or 0\|false. Default 0\|false.
1053	* @type string $show User data to display. If the selected item is empty
1054	* then the 'user_login' will be displayed in parentheses.
1055	* Accepts any user field, or 'display_name_with_login' to show
1056	* the display name with user_login in parentheses.
1057	* Default 'display_name'.
1058	* @type int\|bool $echo Whether to echo or return the drop-down. Accepts 1\|true (echo)
1059	* or 0\|false (return). Default 1\|true.
1060	* @type int $selected Which user ID should be selected. Default 0.
1061	* @type bool $include_selected Whether to always include the selected user ID in the drop-
1062	* down. Default false.
1063	* @type string $name Name attribute of select element. Default 'user'.
1064	* @type string $id ID attribute of the select element. Default is the value of $name.
1065	* @type string $class Class attribute of the select element. Default empty.
1066	* @type int $blog_id ID of blog (Multisite only). Default is ID of the current blog.
1067	* @type string $who Which type of users to query. Accepts only an empty string or
1068	* 'authors'. Default empty.
1069	* @type string\|array $role An array or a comma-separated list of role names that users must
1070	* match to be included in results. Note that this is an inclusive
1071	* list: users must match each role. Default empty.
1072	* @type array $role__in An array of role names. Matched users must have at least one of
1073	* these roles. Default empty array.
1074	* @type array $role__not_in An array of role names to exclude. Users matching one or more of
1075	* these roles will not be included in results. Default empty array.
1076	* }
1077	* @return string String of HTML content.
1078	*/
1079	function wp_dropdown_users( $args = '' ) {
1080	$defaults = array(
1081	'show_option_all' => '',
1082	'show_option_none' => '',
1083	'hide_if_only_one_author' => '',
1084	'orderby' => 'display_name',
1085	'order' => 'ASC',
1086	'include' => '',
1087	'exclude' => '',
1088	'multi' => 0,
1089	'show' => 'display_name',
1090	'echo' => 1,
1091	'selected' => 0,
1092	'name' => 'user',
1093	'class' => '',
1094	'id' => '',
1095	'blog_id' => get_current_blog_id(),
1096	'who' => '',
1097	'include_selected' => false,
1098	'option_none_value' => -1,
1099	'role' => '',
1100	'role__in' => array(),
1101	'role__not_in' => array(),
1102	);
1103
1104	$defaults['selected'] = is_author() ? get_query_var( 'author' ) : 0;
1105
1106	$r = wp_parse_args( $args, $defaults );
1107
1108	$query_args = wp_array_slice_assoc( $r, array( 'blog_id', 'include', 'exclude', 'orderby', 'order', 'who', 'role', 'role__in', 'role__not_in' ) );
1109
1110	$fields = array( 'ID', 'user_login' );
1111
1112	$show = ! empty( $r['show'] ) ? $r['show'] : 'display_name';
1113	if ( 'display_name_with_login' === $show ) {
1114	$fields[] = 'display_name';
1115	} else {
1116	$fields[] = $show;
1117	}
1118
1119	$query_args['fields'] = $fields;
1120
1121	$show_option_all = $r['show_option_all'];
1122	$show_option_none = $r['show_option_none'];
1123	$option_none_value = $r['option_none_value'];
1124
1125	/**
1126	* Filters the query arguments for the list of users in the dropdown.
1127	*
1128	* @since 4.4.0
1129	*
1130	* @param array $query_args The query arguments for get_users().
1131	* @param array $r The arguments passed to wp_dropdown_users() combined with the defaults.
1132	*/
1133	$query_args = apply_filters( 'wp_dropdown_users_args', $query_args, $r );
1134
1135	$users = get_users( $query_args );
1136
1137	$output = '';
1138	if ( ! empty( $users ) && ( empty( $r['hide_if_only_one_author'] ) \|\| count( $users ) > 1 ) ) {
1139	$name = esc_attr( $r['name'] );
1140	if ( $r['multi'] && ! $r['id'] ) {
1141	$id = '';
1142	} else {
1143	$id = $r['id'] ? " id='" . esc_attr( $r['id'] ) . "'" : " id='$name'";
1144	}
1145	$output = "<select name='{$name}'{$id} class='" . $r['class'] . "'>\n";
1146
1147	if ( $show_option_all ) {
1148	$output .= "\t<option value='0'>$show_option_all</option>\n";
1149	}
1150
1151	if ( $show_option_none ) {
1152	$_selected = selected( $option_none_value, $r['selected'], false );
1153	$output .= "\t<option value='" . esc_attr( $option_none_value ) . "'$_selected>$show_option_none</option>\n";
1154	}
1155
1156	if ( $r['include_selected'] && ( $r['selected'] > 0 ) ) {
1157	$found_selected = false;
1158	$r['selected'] = (int) $r['selected'];
1159	foreach ( (array) $users as $user ) {
1160	$user->ID = (int) $user->ID;
1161	if ( $user->ID === $r['selected'] ) {
1162	$found_selected = true;
1163	}
1164	}
1165
1166	if ( ! $found_selected ) {
1167	$users[] = get_userdata( $r['selected'] );
1168	}
1169	}
1170
1171	foreach ( (array) $users as $user ) {
1172	if ( 'display_name_with_login' === $show ) {
1173	/* translators: 1: display name, 2: user_login */
1174	$display = sprintf( _x( '%1$s (%2$s)', 'user dropdown' ), $user->display_name, $user->user_login );
1175	} elseif ( ! empty( $user->$show ) ) {
1176	$display = $user->$show;
1177	} else {
1178	$display = '(' . $user->user_login . ')';
1179	}
1180
1181	$_selected = selected( $user->ID, $r['selected'], false );
1182	$output .= "\t<option value='$user->ID'$_selected>" . esc_html( $display ) . "</option>\n";
1183	}
1184
1185	$output .= '</select>';
1186	}
1187
1188	/**
1189	* Filters the wp_dropdown_users() HTML output.
1190	*
1191	* @since 2.3.0
1192	*
1193	* @param string $output HTML output generated by wp_dropdown_users().
1194	*/
1195	$html = apply_filters( 'wp_dropdown_users', $output );
1196
1197	if ( $r['echo'] ) {
1198	echo $html;
1199	}
1200	return $html;
1201	}
1202
1203	/**
1204	* Sanitize user field based on context.
1205	*
1206	* Possible context values are: 'raw', 'edit', 'db', 'display', 'attribute' and 'js'. The
1207	* 'display' context is used by default. 'attribute' and 'js' contexts are treated like 'display'
1208	* when calling filters.
1209	*
1210	* @since 2.3.0
1211	*
1212	* @param string $field The user Object field name.
1213	* @param mixed $value The user Object value.
1214	* @param int $user_id User ID.
1215	* @param string $context How to sanitize user fields. Looks for 'raw', 'edit', 'db', 'display',
1216	* 'attribute' and 'js'.
1217	* @return mixed Sanitized value.
1218	*/
1219	function sanitize_user_field( $field, $value, $user_id, $context ) {
1220	$int_fields = array( 'ID' );
1221	if ( in_array( $field, $int_fields ) ) {
1222	$value = (int) $value;
1223	}
1224
1225	if ( 'raw' == $context ) {
1226	return $value;
1227	}
1228
1229	if ( ! is_string( $value ) && ! is_numeric( $value ) ) {
1230	return $value;
1231	}
1232
1233	$prefixed = false !== strpos( $field, 'user_' );
1234
1235	if ( 'edit' == $context ) {
1236	if ( $prefixed ) {
1237
1238	/** This filter is documented in wp-includes/post.php */
1239	$value = apply_filters( "edit_{$field}", $value, $user_id );
1240	} else {
1241
1242	/**
1243	* Filters a user field value in the 'edit' context.
1244	*
1245	* The dynamic portion of the hook name, `$field`, refers to the prefixed user
1246	* field being filtered, such as 'user_login', 'user_email', 'first_name', etc.
1247	*
1248	* @since 2.9.0
1249	*
1250	* @param mixed $value Value of the prefixed user field.
1251	* @param int $user_id User ID.
1252	*/
1253	$value = apply_filters( "edit_user_{$field}", $value, $user_id );
1254	}
1255
1256	if ( 'description' == $field ) {
1257	$value = esc_html( $value ); // textarea_escaped?
1258	} else {
1259	$value = esc_attr( $value );
1260	}
1261	} elseif ( 'db' == $context ) {
1262	if ( $prefixed ) {
1263	/** This filter is documented in wp-includes/post.php */
1264	$value = apply_filters( "pre_{$field}", $value );
1265	} else {
1266
1267	/**
1268	* Filters the value of a user field in the 'db' context.
1269	*
1270	* The dynamic portion of the hook name, `$field`, refers to the prefixed user
1271	* field being filtered, such as 'user_login', 'user_email', 'first_name', etc.
1272	*
1273	* @since 2.9.0
1274	*
1275	* @param mixed $value Value of the prefixed user field.
1276	*/
1277	$value = apply_filters( "pre_user_{$field}", $value );
1278	}
1279	} else {
1280	// Use display filters by default.
1281	if ( $prefixed ) {
1282
1283	/** This filter is documented in wp-includes/post.php */
1284	$value = apply_filters( "{$field}", $value, $user_id, $context );
1285	} else {
1286
1287	/**
1288	* Filters the value of a user field in a standard context.
1289	*
1290	* The dynamic portion of the hook name, `$field`, refers to the prefixed user
1291	* field being filtered, such as 'user_login', 'user_email', 'first_name', etc.
1292	*
1293	* @since 2.9.0
1294	*
1295	* @param mixed $value The user object value to sanitize.
1296	* @param int $user_id User ID.
1297	* @param string $context The context to filter within.
1298	*/
1299	$value = apply_filters( "user_{$field}", $value, $user_id, $context );
1300	}
1301	}
1302
1303	if ( 'user_url' == $field ) {
1304	$value = esc_url( $value );
1305	}
1306
1307	if ( 'attribute' == $context ) {
1308	$value = esc_attr( $value );
1309	} elseif ( 'js' == $context ) {
1310	$value = esc_js( $value );
1311	}
1312	return $value;
1313	}
1314
1315	/**
1316	* Update all user caches
1317	*
1318	* @since 3.0.0
1319	*
1320	* @param WP_User $user User object to be cached
1321	* @return bool\|null Returns false on failure.
1322	*/
1323	function update_user_caches( $user ) {
1324	if ( $user instanceof WP_User ) {
1325	if ( ! $user->exists() ) {
1326	return false;
1327	}
1328
1329	$user = $user->data;
1330	}
1331
1332	wp_cache_add( $user->ID, $user, 'users' );
1333	wp_cache_add( $user->user_login, $user->ID, 'userlogins' );
1334	wp_cache_add( $user->user_email, $user->ID, 'useremail' );
1335	wp_cache_add( $user->user_nicename, $user->ID, 'userslugs' );
1336	}
1337
1338	/**
1339	* Clean all user caches
1340	*
1341	* @since 3.0.0
1342	* @since 4.4.0 'clean_user_cache' action was added.
1343	*
1344	* @param WP_User\|int $user User object or ID to be cleaned from the cache
1345	*/
1346	function clean_user_cache( $user ) {
1347	if ( is_numeric( $user ) ) {
1348	$user = new WP_User( $user );
1349	}
1350
1351	if ( ! $user->exists() ) {
1352	return;
1353	}
1354
1355	wp_cache_delete( $user->ID, 'users' );
1356	wp_cache_delete( $user->user_login, 'userlogins' );
1357	wp_cache_delete( $user->user_email, 'useremail' );
1358	wp_cache_delete( $user->user_nicename, 'userslugs' );
1359
1360	/**
1361	* Fires immediately after the given user's cache is cleaned.
1362	*
1363	* @since 4.4.0
1364	*
1365	* @param int $user_id User ID.
1366	* @param WP_User $user User object.
1367	*/
1368	do_action( 'clean_user_cache', $user->ID, $user );
1369	}
1370
1371	/**
1372	* Checks whether the given username exists.
1373	*
1374	* @since 2.0.0
1375	*
1376	* @param string $username Username.
1377	* @return int\|false The user's ID on success, and false on failure.
1378	*/
1379	function username_exists( $username ) {
1380	if ( $user = get_user_by( 'login', $username ) ) {
1381	$user_id = $user->ID;
1382	} else {
1383	$user_id = false;
1384	}
1385
1386	/**
1387	* Filters whether the given username exists or not.
1388	*
1389	* @since 4.9.0
1390	*
1391	* @param int\|false $user_id The user's ID on success, and false on failure.
1392	* @param string $username Username to check.
1393	*/
1394	return apply_filters( 'username_exists', $user_id, $username );
1395	}
1396
1397	/**
1398	* Checks whether the given email exists.
1399	*
1400	* @since 2.1.0
1401	*
1402	* @param string $email Email.
1403	* @return int\|false The user's ID on success, and false on failure.
1404	*/
1405	function email_exists( $email ) {
1406	if ( $user = get_user_by( 'email', $email ) ) {
1407	return $user->ID;
1408	}
1409	return false;
1410	}
1411
1412	/**
1413	* Checks whether a username is valid.
1414	*
1415	* @since 2.0.1
1416	* @since 4.4.0 Empty sanitized usernames are now considered invalid
1417	*
1418	* @param string $username Username.
1419	* @return bool Whether username given is valid
1420	*/
1421	function validate_username( $username ) {
1422	$sanitized = sanitize_user( $username, true );
1423	$valid = ( $sanitized == $username && ! empty( $sanitized ) );
1424
1425	/**
1426	* Filters whether the provided username is valid or not.
1427	*
1428	* @since 2.0.1
1429	*
1430	* @param bool $valid Whether given username is valid.
1431	* @param string $username Username to check.
1432	*/
1433	return apply_filters( 'validate_username', $valid, $username );
1434	}
1435
1436	/**
1437	* Insert a user into the database.
1438	*
1439	* Most of the `$userdata` array fields have filters associated with the values. Exceptions are
1440	* 'ID', 'rich_editing', 'syntax_highlighting', 'comment_shortcuts', 'admin_color', 'use_ssl',
1441	* 'user_registered', and 'role'. The filters have the prefix 'pre_user_' followed by the field
1442	* name. An example using 'description' would have the filter called, 'pre_user_description' that
1443	* can be hooked into.
1444	*
1445	* @since 2.0.0
1446	* @since 3.6.0 The `aim`, `jabber`, and `yim` fields were removed as default user contact
1447	* methods for new installations. See wp_get_user_contact_methods().
1448	* @since 4.7.0 The user's locale can be passed to `$userdata`.
1449	*
1450	* @global wpdb $wpdb WordPress database abstraction object.
1451	*
1452	* @param array\|object\|WP_User $userdata {
1453	* An array, object, or WP_User object of user data arguments.
1454	*
1455	* @type int $ID User ID. If supplied, the user will be updated.
1456	* @type string $user_pass The plain-text user password.
1457	* @type string $user_login The user's login username.
1458	* @type string $user_nicename The URL-friendly user name.
1459	* @type string $user_url The user URL.
1460	* @type string $user_email The user email address.
1461	* @type string $display_name The user's display name.
1462	* Default is the user's username.
1463	* @type string $nickname The user's nickname.
1464	* Default is the user's username.
1465	* @type string $first_name The user's first name. For new users, will be used
1466	* to build the first part of the user's display name
1467	* if `$display_name` is not specified.
1468	* @type string $last_name The user's last name. For new users, will be used
1469	* to build the second part of the user's display name
1470	* if `$display_name` is not specified.
1471	* @type string $description The user's biographical description.
1472	* @type string\|bool $rich_editing Whether to enable the rich-editor for the user.
1473	* False if not empty.
1474	* @type string\|bool $syntax_highlighting Whether to enable the rich code editor for the user.
1475	* False if not empty.
1476	* @type string\|bool $comment_shortcuts Whether to enable comment moderation keyboard
1477	* shortcuts for the user. Default false.
1478	* @type string $admin_color Admin color scheme for the user. Default 'fresh'.
1479	* @type bool $use_ssl Whether the user should always access the admin over
1480	* https. Default false.
1481	* @type string $user_registered Date the user registered. Format is 'Y-m-d H:i:s'.
1482	* @type string\|bool $show_admin_bar_front Whether to display the Admin Bar for the user on the
1483	* site's front end. Default true.
1484	* @type string $role User's role.
1485	* @type string $locale User's locale. Default empty.
1486	* }
1487	* @return int\|WP_Error The newly created user's ID or a WP_Error object if the user could not
1488	* be created.
1489	*/
1490	function wp_insert_user( $userdata ) {
1491	global $wpdb;
1492
1493	if ( $userdata instanceof stdClass ) {
1494	$userdata = get_object_vars( $userdata );
1495	} elseif ( $userdata instanceof WP_User ) {
1496	$userdata = $userdata->to_array();
1497	}
1498
1499	// Are we updating or creating?
1500	if ( ! empty( $userdata['ID'] ) ) {
1501	$ID = (int) $userdata['ID'];
1502	$update = true;
1503	$old_user_data = get_userdata( $ID );
1504
1505	if ( ! $old_user_data ) {
1506	return new WP_Error( 'invalid_user_id', __( 'Invalid user ID.' ) );
1507	}
1508
1509	// hashed in wp_update_user(), plaintext if called directly
1510	$user_pass = ! empty( $userdata['user_pass'] ) ? $userdata['user_pass'] : $old_user_data->user_pass;
1511	} else {
1512	$update = false;
1513	// Hash the password
1514	$user_pass = wp_hash_password( $userdata['user_pass'] );
1515	}
1516
1517	$sanitized_user_login = sanitize_user( $userdata['user_login'], true );
1518
1519	/**
1520	* Filters a username after it has been sanitized.
1521	*
1522	* This filter is called before the user is created or updated.
1523	*
1524	* @since 2.0.3
1525	*
1526	* @param string $sanitized_user_login Username after it has been sanitized.
1527	*/
1528	$pre_user_login = apply_filters( 'pre_user_login', $sanitized_user_login );
1529
1530	//Remove any non-printable chars from the login string to see if we have ended up with an empty username
1531	$user_login = trim( $pre_user_login );
1532
1533	// user_login must be between 0 and 60 characters.
1534	if ( empty( $user_login ) ) {
1535	return new WP_Error( 'empty_user_login', __( 'Cannot create a user with an empty login name.' ) );
1536	} elseif ( mb_strlen( $user_login ) > 60 ) {
1537	return new WP_Error( 'user_login_too_long', __( 'Username may not be longer than 60 characters.' ) );
1538	}
1539
1540	if ( ! $update && username_exists( $user_login ) ) {
1541	return new WP_Error( 'existing_user_login', __( 'Sorry, that username already exists!' ) );
1542	}
1543
1544	/**
1545	* Filters the list of blacklisted usernames.
1546	*
1547	* @since 4.4.0
1548	*
1549	* @param array $usernames Array of blacklisted usernames.
1550	*/
1551	$illegal_logins = (array) apply_filters( 'illegal_user_logins', array() );
1552
1553	if ( in_array( strtolower( $user_login ), array_map( 'strtolower', $illegal_logins ) ) ) {
1554	return new WP_Error( 'invalid_username', __( 'Sorry, that username is not allowed.' ) );
1555	}
1556
1557	/*
1558	* If a nicename is provided, remove unsafe user characters before using it.
1559	* Otherwise build a nicename from the user_login.
1560	*/
1561	if ( ! empty( $userdata['user_nicename'] ) ) {
1562	$user_nicename = sanitize_user( $userdata['user_nicename'], true );
1563	if ( mb_strlen( $user_nicename ) > 50 ) {
1564	return new WP_Error( 'user_nicename_too_long', __( 'Nicename may not be longer than 50 characters.' ) );
1565	}
1566	} else {
1567	$user_nicename = mb_substr( $user_login, 0, 50 );
1568	}
1569
1570	$user_nicename = sanitize_title( $user_nicename );
1571
1572	// Store values to save in user meta.
1573	$meta = array();
1574
1575	/**
1576	* Filters a user's nicename before the user is created or updated.
1577	*
1578	* @since 2.0.3
1579	*
1580	* @param string $user_nicename The user's nicename.
1581	*/
1582	$user_nicename = apply_filters( 'pre_user_nicename', $user_nicename );
1583
1584	$raw_user_url = empty( $userdata['user_url'] ) ? '' : $userdata['user_url'];
1585
1586	/**
1587	* Filters a user's URL before the user is created or updated.
1588	*
1589	* @since 2.0.3
1590	*
1591	* @param string $raw_user_url The user's URL.
1592	*/
1593	$user_url = apply_filters( 'pre_user_url', $raw_user_url );
1594
1595	$raw_user_email = empty( $userdata['user_email'] ) ? '' : $userdata['user_email'];
1596
1597	/**
1598	* Filters a user's email before the user is created or updated.
1599	*
1600	* @since 2.0.3
1601	*
1602	* @param string $raw_user_email The user's email.
1603	*/
1604	$user_email = apply_filters( 'pre_user_email', $raw_user_email );
1605
1606	/*
1607	* If there is no update, just check for `email_exists`. If there is an update,
1608	* check if current email and new email are the same, or not, and check `email_exists`
1609	* accordingly.
1610	*/
1611	if ( ( ! $update \|\| ( ! empty( $old_user_data ) && 0 !== strcasecmp( $user_email, $old_user_data->user_email ) ) )
1612	&& ! defined( 'WP_IMPORTING' )
1613	&& email_exists( $user_email )
1614	) {
1615	return new WP_Error( 'existing_user_email', __( 'Sorry, that email address is already used!' ) );
1616	}
1617	$nickname = empty( $userdata['nickname'] ) ? $user_login : $userdata['nickname'];
1618
1619	/**
1620	* Filters a user's nickname before the user is created or updated.
1621	*
1622	* @since 2.0.3
1623	*
1624	* @param string $nickname The user's nickname.
1625	*/
1626	$meta['nickname'] = apply_filters( 'pre_user_nickname', $nickname );
1627
1628	$first_name = empty( $userdata['first_name'] ) ? '' : $userdata['first_name'];
1629
1630	/**
1631	* Filters a user's first name before the user is created or updated.
1632	*
1633	* @since 2.0.3
1634	*
1635	* @param string $first_name The user's first name.
1636	*/
1637	$meta['first_name'] = apply_filters( 'pre_user_first_name', $first_name );
1638
1639	$last_name = empty( $userdata['last_name'] ) ? '' : $userdata['last_name'];
1640
1641	/**
1642	* Filters a user's last name before the user is created or updated.
1643	*
1644	* @since 2.0.3
1645	*
1646	* @param string $last_name The user's last name.
1647	*/
1648	$meta['last_name'] = apply_filters( 'pre_user_last_name', $last_name );
1649
1650	if ( empty( $userdata['display_name'] ) ) {
1651	if ( $update ) {
1652	$display_name = $user_login;
1653	} elseif ( $meta['first_name'] && $meta['last_name'] ) {
1654	/* translators: 1: first name, 2: last name */
1655	$display_name = sprintf( _x( '%1$s %2$s', 'Display name based on first name and last name' ), $meta['first_name'], $meta['last_name'] );
1656	} elseif ( $meta['first_name'] ) {
1657	$display_name = $meta['first_name'];
1658	} elseif ( $meta['last_name'] ) {
1659	$display_name = $meta['last_name'];
1660	} else {
1661	$display_name = $user_login;
1662	}
1663	} else {
1664	$display_name = $userdata['display_name'];
1665	}
1666
1667	/**
1668	* Filters a user's display name before the user is created or updated.
1669	*
1670	* @since 2.0.3
1671	*
1672	* @param string $display_name The user's display name.
1673	*/
1674	$display_name = apply_filters( 'pre_user_display_name', $display_name );
1675
1676	$description = empty( $userdata['description'] ) ? '' : $userdata['description'];
1677
1678	/**
1679	* Filters a user's description before the user is created or updated.
1680	*
1681	* @since 2.0.3
1682	*
1683	* @param string $description The user's description.
1684	*/
1685	$meta['description'] = apply_filters( 'pre_user_description', $description );
1686
1687	$meta['rich_editing'] = empty( $userdata['rich_editing'] ) ? 'true' : $userdata['rich_editing'];
1688
1689	$meta['syntax_highlighting'] = empty( $userdata['syntax_highlighting'] ) ? 'true' : $userdata['syntax_highlighting'];
1690
1691	$meta['comment_shortcuts'] = empty( $userdata['comment_shortcuts'] ) \|\| 'false' === $userdata['comment_shortcuts'] ? 'false' : 'true';
1692
1693	$admin_color = empty( $userdata['admin_color'] ) ? 'fresh' : $userdata['admin_color'];
1694	$meta['admin_color'] = preg_replace( '\|[^a-z0-9 _.\-@]\|i', '', $admin_color );
1695
1696	$meta['use_ssl'] = empty( $userdata['use_ssl'] ) ? 0 : $userdata['use_ssl'];
1697
1698	$user_registered = empty( $userdata['user_registered'] ) ? gmdate( 'Y-m-d H:i:s' ) : $userdata['user_registered'];
1699
1700	$meta['show_admin_bar_front'] = empty( $userdata['show_admin_bar_front'] ) ? 'true' : $userdata['show_admin_bar_front'];
1701
1702	$meta['locale'] = isset( $userdata['locale'] ) ? $userdata['locale'] : '';
1703
1704	$user_nicename_check = $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM $wpdb->users WHERE user_nicename = %s AND user_login != %s LIMIT 1", $user_nicename, $user_login ) );
1705
1706	if ( $user_nicename_check ) {
1707	$suffix = 2;
1708	while ( $user_nicename_check ) {
1709	// user_nicename allows 50 chars. Subtract one for a hyphen, plus the length of the suffix.
1710	$base_length = 49 - mb_strlen( $suffix );
1711	$alt_user_nicename = mb_substr( $user_nicename, 0, $base_length ) . "-$suffix";
1712	$user_nicename_check = $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM $wpdb->users WHERE user_nicename = %s AND user_login != %s LIMIT 1", $alt_user_nicename, $user_login ) );
1713	$suffix++;
1714	}
1715	$user_nicename = $alt_user_nicename;
1716	}
1717
1718	$compacted = compact( 'user_pass', 'user_email', 'user_url', 'user_nicename', 'display_name', 'user_registered' );
1719	$data = wp_unslash( $compacted );
1720
1721	if ( ! $update ) {
1722	$data = $data + compact( 'user_login' );
1723	}
1724
1725	/**
1726	* Filters user data before the record is created or updated.
1727	*
1728	* It only includes data in the wp_users table wp_user, not any user metadata.
1729	*
1730	* @since 4.9.0
1731	*
1732	* @param array $data {
1733	* Values and keys for the user.
1734	*
1735	* @type string $user_login The user's login. Only included if $update == false
1736	* @type string $user_pass The user's password.
1737	* @type string $user_email The user's email.
1738	* @type string $user_url The user's url.
1739	* @type string $user_nicename The user's nice name. Defaults to a URL-safe version of user's login
1740	* @type string $display_name The user's display name.
1741	* @type string $user_registered MySQL timestamp describing the moment when the user registered. Defaults to
1742	* the current UTC timestamp.
1743	* }
1744	* @param bool $update Whether the user is being updated rather than created.
1745	* @param int\|null $id ID of the user to be updated, or NULL if the user is being created.
1746	*/
1747	$data = apply_filters( 'wp_pre_insert_user_data', $data, $update, $update ? (int) $ID : null );
1748
1749	if ( $update ) {
1750	if ( $user_email !== $old_user_data->user_email ) {
1751	$data['user_activation_key'] = '';
1752	}
1753	$wpdb->update( $wpdb->users, $data, compact( 'ID' ) );
1754	$user_id = (int) $ID;
1755	} else {
1756	$wpdb->insert( $wpdb->users, $data );
1757	$user_id = (int) $wpdb->insert_id;
1758	}
1759
1760	$user = new WP_User( $user_id );
1761
1762	/**
1763	* Filters a user's meta values and keys immediately after the user is created or updated
1764	* and before any user meta is inserted or updated.
1765	*
1766	* Does not include contact methods. These are added using `wp_get_user_contact_methods( $user )`.
1767	*
1768	* @since 4.4.0
1769	*
1770	* @param array $meta {
1771	* Default meta values and keys for the user.
1772	*
1773	* @type string $nickname The user's nickname. Default is the user's username.
1774	* @type string $first_name The user's first name.
1775	* @type string $last_name The user's last name.
1776	* @type string $description The user's description.
1777	* @type bool $rich_editing Whether to enable the rich-editor for the user. False if not empty.
1778	* @type bool $syntax_highlighting Whether to enable the rich code editor for the user. False if not empty.
1779	* @type bool $comment_shortcuts Whether to enable keyboard shortcuts for the user. Default false.
1780	* @type string $admin_color The color scheme for a user's admin screen. Default 'fresh'.
1781	* @type int\|bool $use_ssl Whether to force SSL on the user's admin area. 0\|false if SSL is
1782	* not forced.
1783	* @type bool $show_admin_bar_front Whether to show the admin bar on the front end for the user.
1784	* Default true.
1785	* }
1786	* @param WP_User $user User object.
1787	* @param bool $update Whether the user is being updated rather than created.
1788	*/
1789	$meta = apply_filters( 'insert_user_meta', $meta, $user, $update );
1790
1791	// Update user meta.
1792	foreach ( $meta as $key => $value ) {
1793	update_user_meta( $user_id, $key, $value );
1794	}
1795
1796	foreach ( wp_get_user_contact_methods( $user ) as $key => $value ) {
1797	if ( isset( $userdata[ $key ] ) ) {
1798	update_user_meta( $user_id, $key, $userdata[ $key ] );
1799	}
1800	}
1801
1802	if ( isset( $userdata['role'] ) ) {
1803	$user->set_role( $userdata['role'] );
1804	} elseif ( ! $update ) {
1805	$user->set_role( get_option( 'default_role' ) );
1806	}
1807	wp_cache_delete( $user_id, 'users' );
1808	wp_cache_delete( $user_login, 'userlogins' );
1809
1810	if ( $update ) {
1811	/**
1812	* Fires immediately after an existing user is updated.
1813	*
1814	* @since 2.0.0
1815	*
1816	* @param int $user_id User ID.
1817	* @param WP_User $old_user_data Object containing user's data prior to update.
1818	*/
1819	do_action( 'profile_update', $user_id, $old_user_data );
1820	} else {
1821	/**
1822	* Fires immediately after a new user is registered.
1823	*
1824	* @since 1.5.0
1825	*
1826	* @param int $user_id User ID.
1827	*/
1828	do_action( 'user_register', $user_id );
1829	}
1830
1831	return $user_id;
1832	}
1833
1834	/**
1835	* Update a user in the database.
1836	*
1837	* It is possible to update a user's password by specifying the 'user_pass'
1838	* value in the $userdata parameter array.
1839	*
1840	* If current user's password is being updated, then the cookies will be
1841	* cleared.
1842	*
1843	* @since 2.0.0
1844	*
1845	* @see wp_insert_user() For what fields can be set in $userdata.
1846	*
1847	* @param object\|WP_User $userdata An array of user data or a user object of type stdClass or WP_User.
1848	* @return int\|WP_Error The updated user's ID or a WP_Error object if the user could not be updated.
1849	*/
1850	function wp_update_user( $userdata ) {
1851	if ( $userdata instanceof stdClass ) {
1852	$userdata = get_object_vars( $userdata );
1853	} elseif ( $userdata instanceof WP_User ) {
1854	$userdata = $userdata->to_array();
1855	}
1856
1857	$ID = isset( $userdata['ID'] ) ? (int) $userdata['ID'] : 0;
1858	if ( ! $ID ) {
1859	return new WP_Error( 'invalid_user_id', __( 'Invalid user ID.' ) );
1860	}
1861
1862	// First, get all of the original fields
1863	$user_obj = get_userdata( $ID );
1864	if ( ! $user_obj ) {
1865	return new WP_Error( 'invalid_user_id', __( 'Invalid user ID.' ) );
1866	}
1867
1868	$user = $user_obj->to_array();
1869
1870	// Add additional custom fields
1871	foreach ( _get_additional_user_keys( $user_obj ) as $key ) {
1872	$user[ $key ] = get_user_meta( $ID, $key, true );
1873	}
1874
1875	// Escape data pulled from DB.
1876	$user = add_magic_quotes( $user );
1877
1878	if ( ! empty( $userdata['user_pass'] ) && $userdata['user_pass'] !== $user_obj->user_pass ) {
1879	// If password is changing, hash it now
1880	$plaintext_pass = $userdata['user_pass'];
1881	$userdata['user_pass'] = wp_hash_password( $userdata['user_pass'] );
1882
1883	/**
1884	* Filters whether to send the password change email.
1885	*
1886	* @since 4.3.0
1887	*
1888	* @see wp_insert_user() For `$user` and `$userdata` fields.
1889	*
1890	* @param bool $send Whether to send the email.
1891	* @param array $user The original user array.
1892	* @param array $userdata The updated user array.
1893	*/
1894	$send_password_change_email = apply_filters( 'send_password_change_email', true, $user, $userdata );
1895	}
1896
1897	if ( isset( $userdata['user_email'] ) && $user['user_email'] !== $userdata['user_email'] ) {
1898	/**
1899	* Filters whether to send the email change email.
1900	*
1901	* @since 4.3.0
1902	*
1903	* @see wp_insert_user() For `$user` and `$userdata` fields.
1904	*
1905	* @param bool $send Whether to send the email.
1906	* @param array $user The original user array.
1907	* @param array $userdata The updated user array.
1908	*/
1909	$send_email_change_email = apply_filters( 'send_email_change_email', true, $user, $userdata );
1910	}
1911
1912	wp_cache_delete( $user['user_email'], 'useremail' );
1913	wp_cache_delete( $user['user_nicename'], 'userslugs' );
1914
1915	// Merge old and new fields with new fields overwriting old ones.
1916	$userdata = array_merge( $user, $userdata );
1917	$user_id = wp_insert_user( $userdata );
1918
1919	if ( ! is_wp_error( $user_id ) ) {
1920
1921	$blog_name = wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES );
1922
1923	$switched_locale = false;
1924	if ( ! empty( $send_password_change_email ) \|\| ! empty( $send_email_change_email ) ) {
1925	$switched_locale = switch_to_locale( get_user_locale( $user_id ) );
1926	}
1927
1928	if ( ! empty( $send_password_change_email ) ) {
1929	/* translators: Do not translate USERNAME, ADMIN_EMAIL, EMAIL, SITENAME, SITEURL: those are placeholders. */
1930	$pass_change_text = __(
1931	'Hi ###USERNAME###,
1932
1933	This notice confirms that your password was changed on ###SITENAME###.
1934
1935	If you did not change your password, please contact the Site Administrator at
1936	###ADMIN_EMAIL###
1937
1938	This email has been sent to ###EMAIL###
1939
1940	Regards,
1941	All at ###SITENAME###
1942	###SITEURL###'
1943	);
1944
1945	$pass_change_email = array(
1946	'to' => $user['user_email'],
1947	/* translators: User password change notification email subject. 1: Site name */
1948	'subject' => __( '[%s] Notice of Password Change' ),
1949	'message' => $pass_change_text,
1950	'headers' => '',
1951	);
1952
1953	/**
1954	* Filters the contents of the email sent when the user's password is changed.
1955	*
1956	* @since 4.3.0
1957	*
1958	* @param array $pass_change_email {
1959	* Used to build wp_mail().
1960	* @type string $to The intended recipients. Add emails in a comma separated string.
1961	* @type string $subject The subject of the email.
1962	* @type string $message The content of the email.
1963	* The following strings have a special meaning and will get replaced dynamically:
1964	* - ###USERNAME### The current user's username.
1965	* - ###ADMIN_EMAIL### The admin email in case this was unexpected.
1966	* - ###EMAIL### The user's email address.
1967	* - ###SITENAME### The name of the site.
1968	* - ###SITEURL### The URL to the site.
1969	* @type string $headers Headers. Add headers in a newline (\r\n) separated string.
1970	* }
1971	* @param array $user The original user array.
1972	* @param array $userdata The updated user array.
1973	*/
1974	$pass_change_email = apply_filters( 'password_change_email', $pass_change_email, $user, $userdata );
1975
1976	$pass_change_email['message'] = str_replace( '###USERNAME###', $user['user_login'], $pass_change_email['message'] );
1977	$pass_change_email['message'] = str_replace( '###ADMIN_EMAIL###', get_option( 'admin_email' ), $pass_change_email['message'] );
1978	$pass_change_email['message'] = str_replace( '###EMAIL###', $user['user_email'], $pass_change_email['message'] );
1979	$pass_change_email['message'] = str_replace( '###SITENAME###', $blog_name, $pass_change_email['message'] );
1980	$pass_change_email['message'] = str_replace( '###SITEURL###', home_url(), $pass_change_email['message'] );
1981
1982	wp_mail( $pass_change_email['to'], sprintf( $pass_change_email['subject'], $blog_name ), $pass_change_email['message'], $pass_change_email['headers'] );
1983	}
1984
1985	if ( ! empty( $send_email_change_email ) ) {
1986	/* translators: Do not translate USERNAME, ADMIN_EMAIL, NEW_EMAIL, EMAIL, SITENAME, SITEURL: those are placeholders. */
1987	$email_change_text = __(
1988	'Hi ###USERNAME###,
1989
1990	This notice confirms that your email address on ###SITENAME### was changed to ###NEW_EMAIL###.
1991
1992	If you did not change your email, please contact the Site Administrator at
1993	###ADMIN_EMAIL###
1994
1995	This email has been sent to ###EMAIL###
1996
1997	Regards,
1998	All at ###SITENAME###
1999	###SITEURL###'
2000	);
2001
2002	$email_change_email = array(
2003	'to' => $user['user_email'],
2004	/* translators: User email change notification email subject. 1: Site name */
2005	'subject' => __( '[%s] Notice of Email Change' ),
2006	'message' => $email_change_text,
2007	'headers' => '',
2008	);
2009
2010	/**
2011	* Filters the contents of the email sent when the user's email is changed.
2012	*
2013	* @since 4.3.0
2014	*
2015	* @param array $email_change_email {
2016	* Used to build wp_mail().
2017	* @type string $to The intended recipients.
2018	* @type string $subject The subject of the email.
2019	* @type string $message The content of the email.
2020	* The following strings have a special meaning and will get replaced dynamically:
2021	* - ###USERNAME### The current user's username.
2022	* - ###ADMIN_EMAIL### The admin email in case this was unexpected.
2023	* - ###NEW_EMAIL### The new email address.
2024	* - ###EMAIL### The old email address.
2025	* - ###SITENAME### The name of the site.
2026	* - ###SITEURL### The URL to the site.
2027	* @type string $headers Headers.
2028	* }
2029	* @param array $user The original user array.
2030	* @param array $userdata The updated user array.
2031	*/
2032	$email_change_email = apply_filters( 'email_change_email', $email_change_email, $user, $userdata );
2033
2034	$email_change_email['message'] = str_replace( '###USERNAME###', $user['user_login'], $email_change_email['message'] );
2035	$email_change_email['message'] = str_replace( '###ADMIN_EMAIL###', get_option( 'admin_email' ), $email_change_email['message'] );
2036	$email_change_email['message'] = str_replace( '###NEW_EMAIL###', $userdata['user_email'], $email_change_email['message'] );
2037	$email_change_email['message'] = str_replace( '###EMAIL###', $user['user_email'], $email_change_email['message'] );
2038	$email_change_email['message'] = str_replace( '###SITENAME###', $blog_name, $email_change_email['message'] );
2039	$email_change_email['message'] = str_replace( '###SITEURL###', home_url(), $email_change_email['message'] );
2040
2041	wp_mail( $email_change_email['to'], sprintf( $email_change_email['subject'], $blog_name ), $email_change_email['message'], $email_change_email['headers'] );
2042	}
2043
2044	if ( $switched_locale ) {
2045	restore_previous_locale();
2046	}
2047	}
2048
2049	// Update the cookies if the password changed.
2050	$current_user = wp_get_current_user();
2051	if ( $current_user->ID == $ID ) {
2052	if ( isset( $plaintext_pass ) ) {
2053	wp_clear_auth_cookie();
2054
2055	// Here we calculate the expiration length of the current auth cookie and compare it to the default expiration.
2056	// If it's greater than this, then we know the user checked 'Remember Me' when they logged in.
2057	$logged_in_cookie = wp_parse_auth_cookie( '', 'logged_in' );
2058	/** This filter is documented in wp-includes/pluggable.php */
2059	$default_cookie_life = apply_filters( 'auth_cookie_expiration', ( 2 * DAY_IN_SECONDS ), $ID, false );
2060	$remember = ( ( $logged_in_cookie['expiration'] - time() ) > $default_cookie_life );
2061
2062	wp_set_auth_cookie( $ID, $remember );
2063	}
2064	}
2065
2066	return $user_id;
2067	}
2068
2069	/**
2070	* A simpler way of inserting a user into the database.
2071	*
2072	* Creates a new user with just the username, password, and email. For more
2073	* complex user creation use wp_insert_user() to specify more information.
2074	*
2075	* @since 2.0.0
2076	* @see wp_insert_user() More complete way to create a new user
2077	*
2078	* @param string $username The user's username.
2079	* @param string $password The user's password.
2080	* @param string $email Optional. The user's email. Default empty.
2081	* @return int\|WP_Error The newly created user's ID or a WP_Error object if the user could not
2082	* be created.
2083	*/
2084	function wp_create_user( $username, $password, $email = '' ) {
2085	$user_login = wp_slash( $username );
2086	$user_email = wp_slash( $email );
2087	$user_pass = $password;
2088
2089	$userdata = compact( 'user_login', 'user_email', 'user_pass' );
2090	return wp_insert_user( $userdata );
2091	}
2092
2093	/**
2094	* Returns a list of meta keys to be (maybe) populated in wp_update_user().
2095	*
2096	* The list of keys returned via this function are dependent on the presence
2097	* of those keys in the user meta data to be set.
2098	*
2099	* @since 3.3.0
2100	* @access private
2101	*
2102	* @param WP_User $user WP_User instance.
2103	* @return array List of user keys to be populated in wp_update_user().
2104	*/
2105	function _get_additional_user_keys( $user ) {
2106	$keys = array( 'first_name', 'last_name', 'nickname', 'description', 'rich_editing', 'syntax_highlighting', 'comment_shortcuts', 'admin_color', 'use_ssl', 'show_admin_bar_front', 'locale' );
2107	return array_merge( $keys, array_keys( wp_get_user_contact_methods( $user ) ) );
2108	}
2109
2110	/**
2111	* Set up the user contact methods.
2112	*
2113	* Default contact methods were removed in 3.6. A filter dictates contact methods.
2114	*
2115	* @since 3.7.0
2116	*
2117	* @param WP_User $user Optional. WP_User object.
2118	* @return array Array of contact methods and their labels.
2119	*/
2120	function wp_get_user_contact_methods( $user = null ) {
2121	$methods = array();
2122	if ( get_site_option( 'initial_db_version' ) < 23588 ) {
2123	$methods = array(
2124	'aim' => __( 'AIM' ),
2125	'yim' => __( 'Yahoo IM' ),
2126	'jabber' => __( 'Jabber / Google Talk' ),
2127	);
2128	}
2129
2130	/**
2131	* Filters the user contact methods.
2132	*
2133	* @since 2.9.0
2134	*
2135	* @param array $methods Array of contact methods and their labels.
2136	* @param WP_User $user WP_User object.
2137	*/
2138	return apply_filters( 'user_contactmethods', $methods, $user );
2139	}
2140
2141	/**
2142	* The old private function for setting up user contact methods.
2143	*
2144	* Use wp_get_user_contact_methods() instead.
2145	*
2146	* @since 2.9.0
2147	* @access private
2148	*
2149	* @param WP_User $user Optional. WP_User object. Default null.
2150	* @return array Array of contact methods and their labels.
2151	*/
2152	function _wp_get_user_contactmethods( $user = null ) {
2153	return wp_get_user_contact_methods( $user );
2154	}
2155
2156	/**
2157	* Gets the text suggesting how to create strong passwords.
2158	*
2159	* @since 4.1.0
2160	*
2161	* @return string The password hint text.
2162	*/
2163	function wp_get_password_hint() {
2164	$hint = __( 'Hint: The password should be at least twelve characters long. To make it stronger, use upper and lower case letters, numbers, and symbols like ! " ? $ % ^ & ).' );
2165
2166	/**
2167	* Filters the text describing the site's password complexity policy.
2168	*
2169	* @since 4.1.0
2170	*
2171	* @param string $hint The password hint text.
2172	*/
2173	return apply_filters( 'password_hint', $hint );
2174	}
2175
2176	/**
2177	* Creates, stores, then returns a password reset key for user.
2178	*
2179	* @since 4.4.0
2180	*
2181	* @global wpdb $wpdb WordPress database abstraction object.
2182	* @global PasswordHash $wp_hasher Portable PHP password hashing framework.
2183	*
2184	* @param WP_User $user User to retrieve password reset key for.
2185	*
2186	* @return string\|WP_Error Password reset key on success. WP_Error on error.
2187	*/
2188	function get_password_reset_key( $user ) {
2189	global $wpdb, $wp_hasher;
2190
2191	/**
2192	* Fires before a new password is retrieved.
2193	*
2194	* Use the {@see 'retrieve_password'} hook instead.
2195	*
2196	* @since 1.5.0
2197	* @deprecated 1.5.1 Misspelled. Use 'retrieve_password' hook instead.
2198	*
2199	* @param string $user_login The user login name.
2200	*/
2201	do_action( 'retreive_password', $user->user_login );
2202
2203	/**
2204	* Fires before a new password is retrieved.
2205	*
2206	* @since 1.5.1
2207	*
2208	* @param string $user_login The user login name.
2209	*/
2210	do_action( 'retrieve_password', $user->user_login );
2211
2212	$allow = true;
2213	if ( is_multisite() && is_user_spammy( $user ) ) {
2214	$allow = false;
2215	}
2216
2217	/**
2218	* Filters whether to allow a password to be reset.
2219	*
2220	* @since 2.7.0
2221	*
2222	* @param bool $allow Whether to allow the password to be reset. Default true.
2223	* @param int $user_data->ID The ID of the user attempting to reset a password.
2224	*/
2225	$allow = apply_filters( 'allow_password_reset', $allow, $user->ID );
2226
2227	if ( ! $allow ) {
2228	return new WP_Error( 'no_password_reset', __( 'Password reset is not allowed for this user' ) );
2229	} elseif ( is_wp_error( $allow ) ) {
2230	return $allow;
2231	}
2232
2233	// Generate something random for a password reset key.
2234	$key = wp_generate_password( 20, false );
2235
2236	/**
2237	* Fires when a password reset key is generated.
2238	*
2239	* @since 2.5.0
2240	*
2241	* @param string $user_login The username for the user.
2242	* @param string $key The generated password reset key.
2243	*/
2244	do_action( 'retrieve_password_key', $user->user_login, $key );
2245
2246	// Now insert the key, hashed, into the DB.
2247	if ( empty( $wp_hasher ) ) {
2248	require_once ABSPATH . WPINC . '/class-phpass.php';
2249	$wp_hasher = new PasswordHash( 8, true );
2250	}
2251	$hashed = time() . ':' . $wp_hasher->HashPassword( $key );
2252	$key_saved = $wpdb->update( $wpdb->users, array( 'user_activation_key' => $hashed ), array( 'user_login' => $user->user_login ) );
2253	if ( false === $key_saved ) {
2254	return new WP_Error( 'no_password_key_update', __( 'Could not save password reset key to database.' ) );
2255	}
2256
2257	return $key;
2258	}
2259
2260	/**
2261	* Retrieves a user row based on password reset key and login
2262	*
2263	* A key is considered 'expired' if it exactly matches the value of the
2264	* user_activation_key field, rather than being matched after going through the
2265	* hashing process. This field is now hashed; old values are no longer accepted
2266	* but have a different WP_Error code so good user feedback can be provided.
2267	*
2268	* @since 3.1.0
2269	*
2270	* @global wpdb $wpdb WordPress database object for queries.
2271	* @global PasswordHash $wp_hasher Portable PHP password hashing framework instance.
2272	*
2273	* @param string $key Hash to validate sending user's password.
2274	* @param string $login The user login.
2275	* @return WP_User\|WP_Error WP_User object on success, WP_Error object for invalid or expired keys.
2276	*/
2277	function check_password_reset_key( $key, $login ) {
2278	global $wpdb, $wp_hasher;
2279
2280	$key = preg_replace( '/[^a-z0-9]/i', '', $key );
2281
2282	if ( empty( $key ) \|\| ! is_string( $key ) ) {
2283	return new WP_Error( 'invalid_key', __( 'Invalid key' ) );
2284	}
2285
2286	if ( empty( $login ) \|\| ! is_string( $login ) ) {
2287	return new WP_Error( 'invalid_key', __( 'Invalid key' ) );
2288	}
2289
2290	$row = $wpdb->get_row( $wpdb->prepare( "SELECT ID, user_activation_key FROM $wpdb->users WHERE user_login = %s", $login ) );
2291	if ( ! $row ) {
2292	return new WP_Error( 'invalid_key', __( 'Invalid key' ) );
2293	}
2294
2295	if ( empty( $wp_hasher ) ) {
2296	require_once ABSPATH . WPINC . '/class-phpass.php';
2297	$wp_hasher = new PasswordHash( 8, true );
2298	}
2299
2300	/**
2301	* Filters the expiration time of password reset keys.
2302	*
2303	* @since 4.3.0
2304	*
2305	* @param int $expiration The expiration time in seconds.
2306	*/
2307	$expiration_duration = apply_filters( 'password_reset_expiration', DAY_IN_SECONDS );
2308
2309	if ( false !== strpos( $row->user_activation_key, ':' ) ) {
2310	list( $pass_request_time, $pass_key ) = explode( ':', $row->user_activation_key, 2 );
2311	$expiration_time = $pass_request_time + $expiration_duration;
2312	} else {
2313	$pass_key = $row->user_activation_key;
2314	$expiration_time = false;
2315	}
2316
2317	if ( ! $pass_key ) {
2318	return new WP_Error( 'invalid_key', __( 'Invalid key' ) );
2319	}
2320
2321	$hash_is_correct = $wp_hasher->CheckPassword( $key, $pass_key );
2322
2323	if ( $hash_is_correct && $expiration_time && time() < $expiration_time ) {
2324	return get_userdata( $row->ID );
2325	} elseif ( $hash_is_correct && $expiration_time ) {
2326	// Key has an expiration time that's passed
2327	return new WP_Error( 'expired_key', __( 'Invalid key' ) );
2328	}
2329
2330	if ( hash_equals( $row->user_activation_key, $key ) \|\| ( $hash_is_correct && ! $expiration_time ) ) {
2331	$return = new WP_Error( 'expired_key', __( 'Invalid key' ) );
2332	$user_id = $row->ID;
2333
2334	/**
2335	* Filters the return value of check_password_reset_key() when an
2336	* old-style key is used.
2337	*
2338	* @since 3.7.0 Previously plain-text keys were stored in the database.
2339	* @since 4.3.0 Previously key hashes were stored without an expiration time.
2340	*
2341	* @param WP_Error $return A WP_Error object denoting an expired key.
2342	* Return a WP_User object to validate the key.
2343	* @param int $user_id The matched user ID.
2344	*/
2345	return apply_filters( 'password_reset_key_expired', $return, $user_id );
2346	}
2347
2348	return new WP_Error( 'invalid_key', __( 'Invalid key' ) );
2349	}
2350
2351	/**
2352	* Handles resetting the user's password.
2353	*
2354	* @since 2.5.0
2355	*
2356	* @param WP_User $user The user
2357	* @param string $new_pass New password for the user in plaintext
2358	*/
2359	function reset_password( $user, $new_pass ) {
2360	/**
2361	* Fires before the user's password is reset.
2362	*
2363	* @since 1.5.0
2364	*
2365	* @param object $user The user.
2366	* @param string $new_pass New user password.
2367	*/
2368	do_action( 'password_reset', $user, $new_pass );
2369
2370	wp_set_password( $new_pass, $user->ID );
2371	update_user_option( $user->ID, 'default_password_nag', false, true );
2372
2373	/**
2374	* Fires after the user's password is reset.
2375	*
2376	* @since 4.4.0
2377	*
2378	* @param WP_User $user The user.
2379	* @param string $new_pass New user password.
2380	*/
2381	do_action( 'after_password_reset', $user, $new_pass );
2382	}
2383
2384	/**
2385	* Handles registering a new user.
2386	*
2387	* @since 2.5.0
2388	*
2389	* @param string $user_login User's username for logging in
2390	* @param string $user_email User's email address to send password and add
2391	* @return int\|WP_Error Either user's ID or error on failure.
2392	*/
2393	function register_new_user( $user_login, $user_email ) {
2394	$errors = new WP_Error();
2395
2396	$sanitized_user_login = sanitize_user( $user_login );
2397	/**
2398	* Filters the email address of a user being registered.
2399	*
2400	* @since 2.1.0
2401	*
2402	* @param string $user_email The email address of the new user.
2403	*/
2404	$user_email = apply_filters( 'user_registration_email', $user_email );
2405
2406	// Check the username
2407	if ( $sanitized_user_login == '' ) {
2408	$errors->add( 'empty_username', __( '<strong>ERROR</strong>: Please enter a username.' ) );
2409	} elseif ( ! validate_username( $user_login ) ) {
2410	$errors->add( 'invalid_username', __( '<strong>ERROR</strong>: This username is invalid because it uses illegal characters. Please enter a valid username.' ) );
2411	$sanitized_user_login = '';
2412	} elseif ( username_exists( $sanitized_user_login ) ) {
2413	$errors->add( 'username_exists', __( '<strong>ERROR</strong>: This username is already registered. Please choose another one.' ) );
2414
2415	} else {
2416	/** This filter is documented in wp-includes/user.php */
2417	$illegal_user_logins = array_map( 'strtolower', (array) apply_filters( 'illegal_user_logins', array() ) );
2418	if ( in_array( strtolower( $sanitized_user_login ), $illegal_user_logins ) ) {
2419	$errors->add( 'invalid_username', __( '<strong>ERROR</strong>: Sorry, that username is not allowed.' ) );
2420	}
2421	}
2422
2423	// Check the email address
2424	if ( $user_email == '' ) {
2425	$errors->add( 'empty_email', __( '<strong>ERROR</strong>: Please type your email address.' ) );
2426	} elseif ( ! is_email( $user_email ) ) {
2427	$errors->add( 'invalid_email', __( '<strong>ERROR</strong>: The email address isn’t correct.' ) );
2428	$user_email = '';
2429	} elseif ( email_exists( $user_email ) ) {
2430	$errors->add( 'email_exists', __( '<strong>ERROR</strong>: This email is already registered, please choose another one.' ) );
2431	}
2432
2433	/**
2434	* Fires when submitting registration form data, before the user is created.
2435	*
2436	* @since 2.1.0
2437	*
2438	* @param string $sanitized_user_login The submitted username after being sanitized.
2439	* @param string $user_email The submitted email.
2440	* @param WP_Error $errors Contains any errors with submitted username and email,
2441	* e.g., an empty field, an invalid username or email,
2442	* or an existing username or email.
2443	*/
2444	do_action( 'register_post', $sanitized_user_login, $user_email, $errors );
2445
2446	/**
2447	* Filters the errors encountered when a new user is being registered.
2448	*
2449	* The filtered WP_Error object may, for example, contain errors for an invalid
2450	* or existing username or email address. A WP_Error object should always returned,
2451	* but may or may not contain errors.
2452	*
2453	* If any errors are present in $errors, this will abort the user's registration.
2454	*
2455	* @since 2.1.0
2456	*
2457	* @param WP_Error $errors A WP_Error object containing any errors encountered
2458	* during registration.
2459	* @param string $sanitized_user_login User's username after it has been sanitized.
2460	* @param string $user_email User's email.
2461	*/
2462	$errors = apply_filters( 'registration_errors', $errors, $sanitized_user_login, $user_email );
2463
2464	if ( $errors->get_error_code() ) {
2465	return $errors;
2466	}
2467
2468	$user_pass = wp_generate_password( 12, false );
2469	$user_id = wp_create_user( $sanitized_user_login, $user_pass, $user_email );
2470	if ( ! $user_id \|\| is_wp_error( $user_id ) ) {
2471	$errors->add( 'registerfail', sprintf( __( '<strong>ERROR</strong>: Couldn’t register you… please contact the <a href="mailto:%s">webmaster</a> !' ), get_option( 'admin_email' ) ) );
2472	return $errors;
2473	}
2474
2475	update_user_option( $user_id, 'default_password_nag', true, true ); //Set up the Password change nag.
2476
2477	/**
2478	* Fires after a new user registration has been recorded.
2479	*
2480	* @since 4.4.0
2481	*
2482	* @param int $user_id ID of the newly registered user.
2483	*/
2484	do_action( 'register_new_user', $user_id );
2485
2486	return $user_id;
2487	}
2488
2489	/**
2490	* Initiates email notifications related to the creation of new users.
2491	*
2492	* Notifications are sent both to the site admin and to the newly created user.
2493	*
2494	* @since 4.4.0
2495	* @since 4.6.0 Converted the `$notify` parameter to accept 'user' for sending
2496	* notifications only to the user created.
2497	*
2498	* @param int $user_id ID of the newly created user.
2499	* @param string $notify Optional. Type of notification that should happen. Accepts 'admin'
2500	* or an empty string (admin only), 'user', or 'both' (admin and user).
2501	* Default 'both'.
2502	*/
2503	function wp_send_new_user_notifications( $user_id, $notify = 'both' ) {
2504	wp_new_user_notification( $user_id, null, $notify );
2505	}
2506
2507	/**
2508	* Retrieve the current session token from the logged_in cookie.
2509	*
2510	* @since 4.0.0
2511	*
2512	* @return string Token.
2513	*/
2514	function wp_get_session_token() {
2515	$cookie = wp_parse_auth_cookie( '', 'logged_in' );
2516	return ! empty( $cookie['token'] ) ? $cookie['token'] : '';
2517	}
2518
2519	/**
2520	* Retrieve a list of sessions for the current user.
2521	*
2522	* @since 4.0.0
2523	* @return array Array of sessions.
2524	*/
2525	function wp_get_all_sessions() {
2526	$manager = WP_Session_Tokens::get_instance( get_current_user_id() );
2527	return $manager->get_all();
2528	}
2529
2530	/**
2531	* Remove the current session token from the database.
2532	*
2533	* @since 4.0.0
2534	*/
2535	function wp_destroy_current_session() {
2536	$token = wp_get_session_token();
2537	if ( $token ) {
2538	$manager = WP_Session_Tokens::get_instance( get_current_user_id() );
2539	$manager->destroy( $token );
2540	}
2541	}
2542
2543	/**
2544	* Remove all but the current session token for the current user for the database.
2545	*
2546	* @since 4.0.0
2547	*/
2548	function wp_destroy_other_sessions() {
2549	$token = wp_get_session_token();
2550	if ( $token ) {
2551	$manager = WP_Session_Tokens::get_instance( get_current_user_id() );
2552	$manager->destroy_others( $token );
2553	}
2554	}
2555
2556	/**
2557	* Remove all session tokens for the current user from the database.
2558	*
2559	* @since 4.0.0
2560	*/
2561	function wp_destroy_all_sessions() {
2562	$manager = WP_Session_Tokens::get_instance( get_current_user_id() );
2563	$manager->destroy_all();
2564	}
2565
2566	/**
2567	* Get the user IDs of all users with no role on this site.
2568	*
2569	* @since 4.4.0
2570	* @since 4.9.0 The `$site_id` parameter was added to support multisite.
2571	*
2572	* @param int\|null $site_id Optional. The site ID to get users with no role for. Defaults to the current site.
2573	* @return array Array of user IDs.
2574	*/
2575	function wp_get_users_with_no_role( $site_id = null ) {
2576	global $wpdb;
2577
2578	if ( ! $site_id ) {
2579	$site_id = get_current_blog_id();
2580	}
2581
2582	$prefix = $wpdb->get_blog_prefix( $site_id );
2583
2584	if ( is_multisite() && $site_id != get_current_blog_id() ) {
2585	switch_to_blog( $site_id );
2586	$role_names = wp_roles()->get_names();
2587	restore_current_blog();
2588	} else {
2589	$role_names = wp_roles()->get_names();
2590	}
2591
2592	$regex = implode( '\|', array_keys( $role_names ) );
2593	$regex = preg_replace( '/[^a-zA-Z_\\|-]/', '', $regex );
2594	$users = $wpdb->get_col(
2595	$wpdb->prepare(
2596	"
2597	SELECT user_id
2598	FROM $wpdb->usermeta
2599	WHERE meta_key = '{$prefix}capabilities'
2600	AND meta_value NOT REGEXP %s
2601	", $regex
2602	)
2603	);
2604
2605	return $users;
2606	}
2607
2608	/**
2609	* Retrieves the current user object.
2610	*
2611	* Will set the current user, if the current user is not set. The current user
2612	* will be set to the logged-in person. If no user is logged-in, then it will
2613	* set the current user to 0, which is invalid and won't have any permissions.
2614	*
2615	* This function is used by the pluggable functions wp_get_current_user() and
2616	* get_currentuserinfo(), the latter of which is deprecated but used for backward
2617	* compatibility.
2618	*
2619	* @since 4.5.0
2620	* @access private
2621	*
2622	* @see wp_get_current_user()
2623	* @global WP_User $current_user Checks if the current user is set.
2624	*
2625	* @return WP_User Current WP_User instance.
2626	*/
2627	function _wp_get_current_user() {
2628	global $current_user;
2629
2630	if ( ! empty( $current_user ) ) {
2631	if ( $current_user instanceof WP_User ) {
2632	return $current_user;
2633	}
2634
2635	// Upgrade stdClass to WP_User
2636	if ( is_object( $current_user ) && isset( $current_user->ID ) ) {
2637	$cur_id = $current_user->ID;
2638	$current_user = null;
2639	wp_set_current_user( $cur_id );
2640	return $current_user;
2641	}
2642
2643	// $current_user has a junk value. Force to WP_User with ID 0.
2644	$current_user = null;
2645	wp_set_current_user( 0 );
2646	return $current_user;
2647	}
2648
2649	if ( defined( 'XMLRPC_REQUEST' ) && XMLRPC_REQUEST ) {
2650	wp_set_current_user( 0 );
2651	return $current_user;
2652	}
2653
2654	/**
2655	* Filters the current user.
2656	*
2657	* The default filters use this to determine the current user from the
2658	* request's cookies, if available.
2659	*
2660	* Returning a value of false will effectively short-circuit setting
2661	* the current user.
2662	*
2663	* @since 3.9.0
2664	*
2665	* @param int\|bool $user_id User ID if one has been determined, false otherwise.
2666	*/
2667	$user_id = apply_filters( 'determine_current_user', false );
2668	if ( ! $user_id ) {
2669	wp_set_current_user( 0 );
2670	return $current_user;
2671	}
2672
2673	wp_set_current_user( $user_id );
2674
2675	return $current_user;
2676	}
2677
2678	/**
2679	* Send a confirmation request email when a change of user email address is attempted.
2680	*
2681	* @since 3.0.0
2682	* @since 4.9.0 This function was moved from wp-admin/includes/ms.php so it's no longer Multisite specific.
2683	*
2684	* @global WP_Error $errors WP_Error object.
2685	* @global wpdb $wpdb WordPress database object.
2686	*/
2687	function send_confirmation_on_profile_email() {
2688	global $errors, $wpdb;
2689
2690	$current_user = wp_get_current_user();
2691	if ( ! is_object( $errors ) ) {
2692	$errors = new WP_Error();
2693	}
2694
2695	if ( $current_user->ID != $_POST['user_id'] ) {
2696	return false;
2697	}
2698
2699	if ( $current_user->user_email != $_POST['email'] ) {
2700	if ( ! is_email( $_POST['email'] ) ) {
2701	$errors->add(
2702	'user_email', __( '<strong>ERROR</strong>: The email address isn’t correct.' ), array(
2703	'form-field' => 'email',
2704	)
2705	);
2706
2707	return;
2708	}
2709
2710	if ( $wpdb->get_var( $wpdb->prepare( "SELECT user_email FROM {$wpdb->users} WHERE user_email=%s", $_POST['email'] ) ) ) {
2711	$errors->add(
2712	'user_email', __( '<strong>ERROR</strong>: The email address is already used.' ), array(
2713	'form-field' => 'email',
2714	)
2715	);
2716	delete_user_meta( $current_user->ID, '_new_email' );
2717
2718	return;
2719	}
2720
2721	$hash = md5( $_POST['email'] . time() . mt_rand() );
2722	$new_user_email = array(
2723	'hash' => $hash,
2724	'newemail' => $_POST['email'],
2725	);
2726	update_user_meta( $current_user->ID, '_new_email', $new_user_email );
2727
2728	if ( is_multisite() ) {
2729	$sitename = get_site_option( 'site_name' );
2730	} else {
2731	$sitename = get_option( 'blogname' );
2732	}
2733
2734	/* translators: Do not translate USERNAME, ADMIN_URL, EMAIL, SITENAME, SITEURL: those are placeholders. */
2735	$email_text = __(
2736	'Howdy ###USERNAME###,
2737
2738	You recently requested to have the email address on your account changed.
2739
2740	If this is correct, please click on the following link to change it:
2741	###ADMIN_URL###
2742
2743	You can safely ignore and delete this email if you do not want to
2744	take this action.
2745
2746	This email has been sent to ###EMAIL###
2747
2748	Regards,
2749	All at ###SITENAME###
2750	###SITEURL###'
2751	);
2752
2753	/**
2754	* Filters the text of the email sent when a change of user email address is attempted.
2755	*
2756	* The following strings have a special meaning and will get replaced dynamically:
2757	* ###USERNAME### The current user's username.
2758	* ###ADMIN_URL### The link to click on to confirm the email change.
2759	* ###EMAIL### The new email.
2760	* ###SITENAME### The name of the site.
2761	* ###SITEURL### The URL to the site.
2762	*
2763	* @since MU (3.0.0)
2764	* @since 4.9.0 This filter is no longer Multisite specific.
2765	*
2766	* @param string $email_text Text in the email.
2767	* @param array $new_user_email {
2768	* Data relating to the new user email address.
2769	*
2770	* @type string $hash The secure hash used in the confirmation link URL.
2771	* @type string $newemail The proposed new email address.
2772	* }
2773	*/
2774	$content = apply_filters( 'new_user_email_content', $email_text, $new_user_email );
2775
2776	$content = str_replace( '###USERNAME###', $current_user->user_login, $content );
2777	$content = str_replace( '###ADMIN_URL###', esc_url( admin_url( 'profile.php?newuseremail=' . $hash ) ), $content );
2778	$content = str_replace( '###EMAIL###', $_POST['email'], $content );
2779	$content = str_replace( '###SITENAME###', wp_specialchars_decode( $sitename, ENT_QUOTES ), $content );
2780	$content = str_replace( '###SITEURL###', network_home_url(), $content );
2781
2782	wp_mail( $_POST['email'], sprintf( __( '[%s] New Email Address' ), wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES ) ), $content );
2783
2784	$_POST['email'] = $current_user->user_email;
2785	}
2786	}
2787
2788	/**
2789	* Adds an admin notice alerting the user to check for confirmation request email
2790	* after email address change.
2791	*
2792	* @since 3.0.0
2793	* @since 4.9.0 This function was moved from wp-admin/includes/ms.php so it's no longer Multisite specific.
2794	*
2795	* @global string $pagenow
2796	*/
2797	function new_user_email_admin_notice() {
2798	global $pagenow;
2799	if ( 'profile.php' === $pagenow && isset( $_GET['updated'] ) && $email = get_user_meta( get_current_user_id(), '_new_email', true ) ) {
2800	/* translators: %s: New email address */
2801	echo '<div class="notice notice-info"><p>' . sprintf( __( 'Your email address has not been updated yet. Please check your inbox at %s for a confirmation email.' ), '<code>' . esc_html( $email['newemail'] ) . '</code>' ) . '</p></div>';
2802	}
2803	}

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Ticket #43037: user.php

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