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/wp-admin/includes/class-wp-automatic-updater.php

https://bitbucket.org/stephenharris/stephenharris
PHP | 923 lines | 498 code | 116 blank | 309 comment | 136 complexity | 81097f6f3da72f42a523822a6ff7b2a6 MD5 | raw file
  1<?php
  2/**
  3 * Upgrade API: WP_Automatic_Updater class
  4 *
  5 * @package WordPress
  6 * @subpackage Upgrader
  7 * @since 4.6.0
  8 */
  9
 10/**
 11 * Core class used for handling automatic background updates.
 12 *
 13 * @since 3.7.0
 14 * @since 4.6.0 Moved to its own file from wp-admin/includes/class-wp-upgrader.php.
 15 */
 16class WP_Automatic_Updater {
 17
 18	/**
 19	 * Tracks update results during processing.
 20	 *
 21	 * @var array
 22	 * @access protected
 23	 */
 24	protected $update_results = array();
 25
 26	/**
 27	 * Whether the entire automatic updater is disabled.
 28	 *
 29	 * @since 3.7.0
 30	 * @access public
 31	 */
 32	public function is_disabled() {
 33		// Background updates are disabled if you don't want file changes.
 34		if ( defined( 'DISALLOW_FILE_MODS' ) && DISALLOW_FILE_MODS )
 35			return true;
 36
 37		if ( wp_installing() )
 38			return true;
 39
 40		// More fine grained control can be done through the WP_AUTO_UPDATE_CORE constant and filters.
 41		$disabled = defined( 'AUTOMATIC_UPDATER_DISABLED' ) && AUTOMATIC_UPDATER_DISABLED;
 42
 43		/**
 44		 * Filters whether to entirely disable background updates.
 45		 *
 46		 * There are more fine-grained filters and controls for selective disabling.
 47		 * This filter parallels the AUTOMATIC_UPDATER_DISABLED constant in name.
 48		 *
 49		 * This also disables update notification emails. That may change in the future.
 50		 *
 51		 * @since 3.7.0
 52		 *
 53		 * @param bool $disabled Whether the updater should be disabled.
 54		 */
 55		return apply_filters( 'automatic_updater_disabled', $disabled );
 56	}
 57
 58	/**
 59	 * Check for version control checkouts.
 60	 *
 61	 * Checks for Subversion, Git, Mercurial, and Bazaar. It recursively looks up the
 62	 * filesystem to the top of the drive, erring on the side of detecting a VCS
 63	 * checkout somewhere.
 64	 *
 65	 * ABSPATH is always checked in addition to whatever $context is (which may be the
 66	 * wp-content directory, for example). The underlying assumption is that if you are
 67	 * using version control *anywhere*, then you should be making decisions for
 68	 * how things get updated.
 69	 *
 70	 * @since 3.7.0
 71	 * @access public
 72	 *
 73	 * @param string $context The filesystem path to check, in addition to ABSPATH.
 74	 */
 75	public function is_vcs_checkout( $context ) {
 76		$context_dirs = array( untrailingslashit( $context ) );
 77		if ( $context !== ABSPATH )
 78			$context_dirs[] = untrailingslashit( ABSPATH );
 79
 80		$vcs_dirs = array( '.svn', '.git', '.hg', '.bzr' );
 81		$check_dirs = array();
 82
 83		foreach ( $context_dirs as $context_dir ) {
 84			// Walk up from $context_dir to the root.
 85			do {
 86				$check_dirs[] = $context_dir;
 87
 88				// Once we've hit '/' or 'C:\', we need to stop. dirname will keep returning the input here.
 89				if ( $context_dir == dirname( $context_dir ) )
 90					break;
 91
 92			// Continue one level at a time.
 93			} while ( $context_dir = dirname( $context_dir ) );
 94		}
 95
 96		$check_dirs = array_unique( $check_dirs );
 97
 98		// Search all directories we've found for evidence of version control.
 99		foreach ( $vcs_dirs as $vcs_dir ) {
100			foreach ( $check_dirs as $check_dir ) {
101				if ( $checkout = @is_dir( rtrim( $check_dir, '\\/' ) . "/$vcs_dir" ) )
102					break 2;
103			}
104		}
105
106		/**
107		 * Filters whether the automatic updater should consider a filesystem
108		 * location to be potentially managed by a version control system.
109		 *
110		 * @since 3.7.0
111		 *
112		 * @param bool $checkout  Whether a VCS checkout was discovered at $context
113		 *                        or ABSPATH, or anywhere higher.
114		 * @param string $context The filesystem context (a path) against which
115		 *                        filesystem status should be checked.
116		 */
117		return apply_filters( 'automatic_updates_is_vcs_checkout', $checkout, $context );
118	}
119
120	/**
121	 * Tests to see if we can and should update a specific item.
122	 *
123	 * @since 3.7.0
124	 * @access public
125	 *
126	 * @global wpdb $wpdb WordPress database abstraction object.
127	 *
128	 * @param string $type    The type of update being checked: 'core', 'theme',
129	 *                        'plugin', 'translation'.
130	 * @param object $item    The update offer.
131	 * @param string $context The filesystem context (a path) against which filesystem
132	 *                        access and status should be checked.
133	 */
134	public function should_update( $type, $item, $context ) {
135		// Used to see if WP_Filesystem is set up to allow unattended updates.
136		$skin = new Automatic_Upgrader_Skin;
137
138		if ( $this->is_disabled() )
139			return false;
140
141		// Only relax the filesystem checks when the update doesn't include new files
142		$allow_relaxed_file_ownership = false;
143		if ( 'core' == $type && isset( $item->new_files ) && ! $item->new_files ) {
144			$allow_relaxed_file_ownership = true;
145		}
146
147		// If we can't do an auto core update, we may still be able to email the user.
148		if ( ! $skin->request_filesystem_credentials( false, $context, $allow_relaxed_file_ownership ) || $this->is_vcs_checkout( $context ) ) {
149			if ( 'core' == $type )
150				$this->send_core_update_notification_email( $item );
151			return false;
152		}
153
154		// Next up, is this an item we can update?
155		if ( 'core' == $type )
156			$update = Core_Upgrader::should_update_to_version( $item->current );
157		else
158			$update = ! empty( $item->autoupdate );
159
160		/**
161		 * Filters whether to automatically update core, a plugin, a theme, or a language.
162		 *
163		 * The dynamic portion of the hook name, `$type`, refers to the type of update
164		 * being checked. Can be 'core', 'theme', 'plugin', or 'translation'.
165		 *
166		 * Generally speaking, plugins, themes, and major core versions are not updated
167		 * by default, while translations and minor and development versions for core
168		 * are updated by default.
169		 *
170		 * See the {@see 'allow_dev_auto_core_updates', {@see 'allow_minor_auto_core_updates'},
171		 * and {@see 'allow_major_auto_core_updates'} filters for a more straightforward way to
172		 * adjust core updates.
173		 *
174		 * @since 3.7.0
175		 *
176		 * @param bool   $update Whether to update.
177		 * @param object $item   The update offer.
178		 */
179		$update = apply_filters( "auto_update_{$type}", $update, $item );
180
181		if ( ! $update ) {
182			if ( 'core' == $type )
183				$this->send_core_update_notification_email( $item );
184			return false;
185		}
186
187		// If it's a core update, are we actually compatible with its requirements?
188		if ( 'core' == $type ) {
189			global $wpdb;
190
191			$php_compat = version_compare( phpversion(), $item->php_version, '>=' );
192			if ( file_exists( WP_CONTENT_DIR . '/db.php' ) && empty( $wpdb->is_mysql ) )
193				$mysql_compat = true;
194			else
195				$mysql_compat = version_compare( $wpdb->db_version(), $item->mysql_version, '>=' );
196
197			if ( ! $php_compat || ! $mysql_compat )
198				return false;
199		}
200
201		return true;
202	}
203
204	/**
205	 * Notifies an administrator of a core update.
206	 *
207	 * @since 3.7.0
208	 * @access protected
209	 *
210	 * @param object $item The update offer.
211	 */
212	protected function send_core_update_notification_email( $item ) {
213		$notified = get_site_option( 'auto_core_update_notified' );
214
215		// Don't notify if we've already notified the same email address of the same version.
216		if ( $notified && $notified['email'] == get_site_option( 'admin_email' ) && $notified['version'] == $item->current )
217			return false;
218
219		// See if we need to notify users of a core update.
220		$notify = ! empty( $item->notify_email );
221
222		/**
223		 * Filters whether to notify the site administrator of a new core update.
224		 *
225		 * By default, administrators are notified when the update offer received
226		 * from WordPress.org sets a particular flag. This allows some discretion
227		 * in if and when to notify.
228		 *
229		 * This filter is only evaluated once per release. If the same email address
230		 * was already notified of the same new version, WordPress won't repeatedly
231		 * email the administrator.
232		 *
233		 * This filter is also used on about.php to check if a plugin has disabled
234		 * these notifications.
235		 *
236		 * @since 3.7.0
237		 *
238		 * @param bool   $notify Whether the site administrator is notified.
239		 * @param object $item   The update offer.
240		 */
241		if ( ! apply_filters( 'send_core_update_notification_email', $notify, $item ) )
242			return false;
243
244		$this->send_email( 'manual', $item );
245		return true;
246	}
247
248	/**
249	 * Update an item, if appropriate.
250	 *
251	 * @since 3.7.0
252	 * @access public
253	 *
254	 * @param string $type The type of update being checked: 'core', 'theme', 'plugin', 'translation'.
255	 * @param object $item The update offer.
256	 *
257	 * @return null|WP_Error
258	 */
259	public function update( $type, $item ) {
260		$skin = new Automatic_Upgrader_Skin;
261
262		switch ( $type ) {
263			case 'core':
264				// The Core upgrader doesn't use the Upgrader's skin during the actual main part of the upgrade, instead, firing a filter.
265				add_filter( 'update_feedback', array( $skin, 'feedback' ) );
266				$upgrader = new Core_Upgrader( $skin );
267				$context  = ABSPATH;
268				break;
269			case 'plugin':
270				$upgrader = new Plugin_Upgrader( $skin );
271				$context  = WP_PLUGIN_DIR; // We don't support custom Plugin directories, or updates for WPMU_PLUGIN_DIR
272				break;
273			case 'theme':
274				$upgrader = new Theme_Upgrader( $skin );
275				$context  = get_theme_root( $item->theme );
276				break;
277			case 'translation':
278				$upgrader = new Language_Pack_Upgrader( $skin );
279				$context  = WP_CONTENT_DIR; // WP_LANG_DIR;
280				break;
281		}
282
283		// Determine whether we can and should perform this update.
284		if ( ! $this->should_update( $type, $item, $context ) )
285			return false;
286
287		/**
288		 * Fires immediately prior to an auto-update.
289		 *
290		 * @since 4.4.0
291		 *
292		 * @param string $type    The type of update being checked: 'core', 'theme', 'plugin', or 'translation'.
293		 * @param object $item    The update offer.
294		 * @param string $context The filesystem context (a path) against which filesystem access and status
295		 *                        should be checked.
296		 */
297		do_action( 'pre_auto_update', $type, $item, $context );
298
299		$upgrader_item = $item;
300		switch ( $type ) {
301			case 'core':
302				$skin->feedback( __( 'Updating to WordPress %s' ), $item->version );
303				$item_name = sprintf( __( 'WordPress %s' ), $item->version );
304				break;
305			case 'theme':
306				$upgrader_item = $item->theme;
307				$theme = wp_get_theme( $upgrader_item );
308				$item_name = $theme->Get( 'Name' );
309				$skin->feedback( __( 'Updating theme: %s' ), $item_name );
310				break;
311			case 'plugin':
312				$upgrader_item = $item->plugin;
313				$plugin_data = get_plugin_data( $context . '/' . $upgrader_item );
314				$item_name = $plugin_data['Name'];
315				$skin->feedback( __( 'Updating plugin: %s' ), $item_name );
316				break;
317			case 'translation':
318				$language_item_name = $upgrader->get_name_for_update( $item );
319				$item_name = sprintf( __( 'Translations for %s' ), $language_item_name );
320				$skin->feedback( sprintf( __( 'Updating translations for %1$s (%2$s)&#8230;' ), $language_item_name, $item->language ) );
321				break;
322		}
323
324		$allow_relaxed_file_ownership = false;
325		if ( 'core' == $type && isset( $item->new_files ) && ! $item->new_files ) {
326			$allow_relaxed_file_ownership = true;
327		}
328
329		// Boom, This sites about to get a whole new splash of paint!
330		$upgrade_result = $upgrader->upgrade( $upgrader_item, array(
331			'clear_update_cache' => false,
332			// Always use partial builds if possible for core updates.
333			'pre_check_md5'      => false,
334			// Only available for core updates.
335			'attempt_rollback'   => true,
336			// Allow relaxed file ownership in some scenarios
337			'allow_relaxed_file_ownership' => $allow_relaxed_file_ownership,
338		) );
339
340		// If the filesystem is unavailable, false is returned.
341		if ( false === $upgrade_result ) {
342			$upgrade_result = new WP_Error( 'fs_unavailable', __( 'Could not access filesystem.' ) );
343		}
344
345		if ( 'core' == $type ) {
346			if ( is_wp_error( $upgrade_result ) && ( 'up_to_date' == $upgrade_result->get_error_code() || 'locked' == $upgrade_result->get_error_code() ) ) {
347				// These aren't actual errors, treat it as a skipped-update instead to avoid triggering the post-core update failure routines.
348				return false;
349			}
350
351			// Core doesn't output this, so let's append it so we don't get confused.
352			if ( is_wp_error( $upgrade_result ) ) {
353				$skin->error( __( 'Installation Failed' ), $upgrade_result );
354			} else {
355				$skin->feedback( __( 'WordPress updated successfully' ) );
356			}
357		}
358
359		$this->update_results[ $type ][] = (object) array(
360			'item'     => $item,
361			'result'   => $upgrade_result,
362			'name'     => $item_name,
363			'messages' => $skin->get_upgrade_messages()
364		);
365
366		return $upgrade_result;
367	}
368
369	/**
370	 * Kicks off the background update process, looping through all pending updates.
371	 *
372	 * @since 3.7.0
373	 * @access public
374	 */
375	public function run() {
376		if ( $this->is_disabled() )
377			return;
378
379		if ( ! is_main_network() || ! is_main_site() )
380			return;
381
382		if ( ! WP_Upgrader::create_lock( 'auto_updater' ) )
383			return;
384
385		// Don't automatically run these thins, as we'll handle it ourselves
386		remove_action( 'upgrader_process_complete', array( 'Language_Pack_Upgrader', 'async_upgrade' ), 20 );
387		remove_action( 'upgrader_process_complete', 'wp_version_check' );
388		remove_action( 'upgrader_process_complete', 'wp_update_plugins' );
389		remove_action( 'upgrader_process_complete', 'wp_update_themes' );
390
391		// Next, Plugins
392		wp_update_plugins(); // Check for Plugin updates
393		$plugin_updates = get_site_transient( 'update_plugins' );
394		if ( $plugin_updates && !empty( $plugin_updates->response ) ) {
395			foreach ( $plugin_updates->response as $plugin ) {
396				$this->update( 'plugin', $plugin );
397			}
398			// Force refresh of plugin update information
399			wp_clean_plugins_cache();
400		}
401
402		// Next, those themes we all love
403		wp_update_themes();  // Check for Theme updates
404		$theme_updates = get_site_transient( 'update_themes' );
405		if ( $theme_updates && !empty( $theme_updates->response ) ) {
406			foreach ( $theme_updates->response as $theme ) {
407				$this->update( 'theme', (object) $theme );
408			}
409			// Force refresh of theme update information
410			wp_clean_themes_cache();
411		}
412
413		// Next, Process any core update
414		wp_version_check(); // Check for Core updates
415		$core_update = find_core_auto_update();
416
417		if ( $core_update )
418			$this->update( 'core', $core_update );
419
420		// Clean up, and check for any pending translations
421		// (Core_Upgrader checks for core updates)
422		$theme_stats = array();
423		if ( isset( $this->update_results['theme'] ) ) {
424			foreach ( $this->update_results['theme'] as $upgrade ) {
425				$theme_stats[ $upgrade->item->theme ] = ( true === $upgrade->result );
426			}
427		}
428		wp_update_themes( $theme_stats );  // Check for Theme updates
429
430		$plugin_stats = array();
431		if ( isset( $this->update_results['plugin'] ) ) {
432			foreach ( $this->update_results['plugin'] as $upgrade ) {
433				$plugin_stats[ $upgrade->item->plugin ] = ( true === $upgrade->result );
434			}
435		}
436		wp_update_plugins( $plugin_stats ); // Check for Plugin updates
437
438		// Finally, Process any new translations
439		$language_updates = wp_get_translation_updates();
440		if ( $language_updates ) {
441			foreach ( $language_updates as $update ) {
442				$this->update( 'translation', $update );
443			}
444
445			// Clear existing caches
446			wp_clean_update_cache();
447
448			wp_version_check();  // check for Core updates
449			wp_update_themes();  // Check for Theme updates
450			wp_update_plugins(); // Check for Plugin updates
451		}
452
453		// Send debugging email to all development installs.
454		if ( ! empty( $this->update_results ) ) {
455			$development_version = false !== strpos( get_bloginfo( 'version' ), '-' );
456
457			/**
458			 * Filters whether to send a debugging email for each automatic background update.
459			 *
460			 * @since 3.7.0
461			 *
462			 * @param bool $development_version By default, emails are sent if the
463			 *                                  install is a development version.
464			 *                                  Return false to avoid the email.
465			 */
466			if ( apply_filters( 'automatic_updates_send_debug_email', $development_version ) )
467				$this->send_debug_email();
468
469			if ( ! empty( $this->update_results['core'] ) )
470				$this->after_core_update( $this->update_results['core'][0] );
471
472			/**
473			 * Fires after all automatic updates have run.
474			 *
475			 * @since 3.8.0
476			 *
477			 * @param array $update_results The results of all attempted updates.
478			 */
479			do_action( 'automatic_updates_complete', $this->update_results );
480		}
481
482		WP_Upgrader::release_lock( 'auto_updater' );
483	}
484
485	/**
486	 * If we tried to perform a core update, check if we should send an email,
487	 * and if we need to avoid processing future updates.
488	 *
489	 * @since Unknown
490	 * @access protected
491	 *
492	 * @param object $update_result The result of the core update. Includes the update offer and result.
493	 */
494	protected function after_core_update( $update_result ) {
495		$wp_version = get_bloginfo( 'version' );
496
497		$core_update = $update_result->item;
498		$result      = $update_result->result;
499
500		if ( ! is_wp_error( $result ) ) {
501			$this->send_email( 'success', $core_update );
502			return;
503		}
504
505		$error_code = $result->get_error_code();
506
507		// Any of these WP_Error codes are critical failures, as in they occurred after we started to copy core files.
508		// We should not try to perform a background update again until there is a successful one-click update performed by the user.
509		$critical = false;
510		if ( $error_code === 'disk_full' || false !== strpos( $error_code, '__copy_dir' ) ) {
511			$critical = true;
512		} elseif ( $error_code === 'rollback_was_required' && is_wp_error( $result->get_error_data()->rollback ) ) {
513			// A rollback is only critical if it failed too.
514			$critical = true;
515			$rollback_result = $result->get_error_data()->rollback;
516		} elseif ( false !== strpos( $error_code, 'do_rollback' ) ) {
517			$critical = true;
518		}
519
520		if ( $critical ) {
521			$critical_data = array(
522				'attempted'  => $core_update->current,
523				'current'    => $wp_version,
524				'error_code' => $error_code,
525				'error_data' => $result->get_error_data(),
526				'timestamp'  => time(),
527				'critical'   => true,
528			);
529			if ( isset( $rollback_result ) ) {
530				$critical_data['rollback_code'] = $rollback_result->get_error_code();
531				$critical_data['rollback_data'] = $rollback_result->get_error_data();
532			}
533			update_site_option( 'auto_core_update_failed', $critical_data );
534			$this->send_email( 'critical', $core_update, $result );
535			return;
536		}
537
538		/*
539		 * Any other WP_Error code (like download_failed or files_not_writable) occurs before
540		 * we tried to copy over core files. Thus, the failures are early and graceful.
541		 *
542		 * We should avoid trying to perform a background update again for the same version.
543		 * But we can try again if another version is released.
544		 *
545		 * For certain 'transient' failures, like download_failed, we should allow retries.
546		 * In fact, let's schedule a special update for an hour from now. (It's possible
547		 * the issue could actually be on WordPress.org's side.) If that one fails, then email.
548		 */
549		$send = true;
550  		$transient_failures = array( 'incompatible_archive', 'download_failed', 'insane_distro', 'locked' );
551  		if ( in_array( $error_code, $transient_failures ) && ! get_site_option( 'auto_core_update_failed' ) ) {
552  			wp_schedule_single_event( time() + HOUR_IN_SECONDS, 'wp_maybe_auto_update' );
553  			$send = false;
554  		}
555
556  		$n = get_site_option( 'auto_core_update_notified' );
557		// Don't notify if we've already notified the same email address of the same version of the same notification type.
558		if ( $n && 'fail' == $n['type'] && $n['email'] == get_site_option( 'admin_email' ) && $n['version'] == $core_update->current )
559			$send = false;
560
561		update_site_option( 'auto_core_update_failed', array(
562			'attempted'  => $core_update->current,
563			'current'    => $wp_version,
564			'error_code' => $error_code,
565			'error_data' => $result->get_error_data(),
566			'timestamp'  => time(),
567			'retry'      => in_array( $error_code, $transient_failures ),
568		) );
569
570		if ( $send )
571			$this->send_email( 'fail', $core_update, $result );
572	}
573
574	/**
575	 * Sends an email upon the completion or failure of a background core update.
576	 *
577	 * @since 3.7.0
578	 * @access protected
579	 *
580	 * @param string $type        The type of email to send. Can be one of 'success', 'fail', 'manual', 'critical'.
581	 * @param object $core_update The update offer that was attempted.
582	 * @param mixed  $result      Optional. The result for the core update. Can be WP_Error.
583	 */
584	protected function send_email( $type, $core_update, $result = null ) {
585		update_site_option( 'auto_core_update_notified', array(
586			'type'      => $type,
587			'email'     => get_site_option( 'admin_email' ),
588			'version'   => $core_update->current,
589			'timestamp' => time(),
590		) );
591
592		$next_user_core_update = get_preferred_from_update_core();
593		// If the update transient is empty, use the update we just performed
594		if ( ! $next_user_core_update )
595			$next_user_core_update = $core_update;
596		$newer_version_available = ( 'upgrade' == $next_user_core_update->response && version_compare( $next_user_core_update->version, $core_update->version, '>' ) );
597
598		/**
599		 * Filters whether to send an email following an automatic background core update.
600		 *
601		 * @since 3.7.0
602		 *
603		 * @param bool   $send        Whether to send the email. Default true.
604		 * @param string $type        The type of email to send. Can be one of
605		 *                            'success', 'fail', 'critical'.
606		 * @param object $core_update The update offer that was attempted.
607		 * @param mixed  $result      The result for the core update. Can be WP_Error.
608		 */
609		if ( 'manual' !== $type && ! apply_filters( 'auto_core_update_send_email', true, $type, $core_update, $result ) )
610			return;
611
612		switch ( $type ) {
613			case 'success' : // We updated.
614				/* translators: 1: Site name, 2: WordPress version number. */
615				$subject = __( '[%1$s] Your site has updated to WordPress %2$s' );
616				break;
617
618			case 'fail' :   // We tried to update but couldn't.
619			case 'manual' : // We can't update (and made no attempt).
620				/* translators: 1: Site name, 2: WordPress version number. */
621				$subject = __( '[%1$s] WordPress %2$s is available. Please update!' );
622				break;
623
624			case 'critical' : // We tried to update, started to copy files, then things went wrong.
625				/* translators: 1: Site name. */
626				$subject = __( '[%1$s] URGENT: Your site may be down due to a failed update' );
627				break;
628
629			default :
630				return;
631		}
632
633		// If the auto update is not to the latest version, say that the current version of WP is available instead.
634		$version = 'success' === $type ? $core_update->current : $next_user_core_update->current;
635		$subject = sprintf( $subject, wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES ), $version );
636
637		$body = '';
638
639		switch ( $type ) {
640			case 'success' :
641				$body .= sprintf( __( 'Howdy! Your site at %1$s has been updated automatically to WordPress %2$s.' ), home_url(), $core_update->current );
642				$body .= "\n\n";
643				if ( ! $newer_version_available )
644					$body .= __( 'No further action is needed on your part.' ) . ' ';
645
646				// Can only reference the About screen if their update was successful.
647				list( $about_version ) = explode( '-', $core_update->current, 2 );
648				$body .= sprintf( __( "For more on version %s, see the About WordPress screen:" ), $about_version );
649				$body .= "\n" . admin_url( 'about.php' );
650
651				if ( $newer_version_available ) {
652					$body .= "\n\n" . sprintf( __( 'WordPress %s is also now available.' ), $next_user_core_update->current ) . ' ';
653					$body .= __( 'Updating is easy and only takes a few moments:' );
654					$body .= "\n" . network_admin_url( 'update-core.php' );
655				}
656
657				break;
658
659			case 'fail' :
660			case 'manual' :
661				$body .= sprintf( __( 'Please update your site at %1$s to WordPress %2$s.' ), home_url(), $next_user_core_update->current );
662
663				$body .= "\n\n";
664
665				// Don't show this message if there is a newer version available.
666				// Potential for confusion, and also not useful for them to know at this point.
667				if ( 'fail' == $type && ! $newer_version_available )
668					$body .= __( 'We tried but were unable to update your site automatically.' ) . ' ';
669
670				$body .= __( 'Updating is easy and only takes a few moments:' );
671				$body .= "\n" . network_admin_url( 'update-core.php' );
672				break;
673
674			case 'critical' :
675				if ( $newer_version_available )
676					$body .= sprintf( __( 'Your site at %1$s experienced a critical failure while trying to update WordPress to version %2$s.' ), home_url(), $core_update->current );
677				else
678					$body .= sprintf( __( 'Your site at %1$s experienced a critical failure while trying to update to the latest version of WordPress, %2$s.' ), home_url(), $core_update->current );
679
680				$body .= "\n\n" . __( "This means your site may be offline or broken. Don't panic; this can be fixed." );
681
682				$body .= "\n\n" . __( "Please check out your site now. It's possible that everything is working. If it says you need to update, you should do so:" );
683				$body .= "\n" . network_admin_url( 'update-core.php' );
684				break;
685		}
686
687		$critical_support = 'critical' === $type && ! empty( $core_update->support_email );
688		if ( $critical_support ) {
689			// Support offer if available.
690			$body .= "\n\n" . sprintf( __( "The WordPress team is willing to help you. Forward this email to %s and the team will work with you to make sure your site is working." ), $core_update->support_email );
691		} else {
692			// Add a note about the support forums.
693			$body .= "\n\n" . __( 'If you experience any issues or need support, the volunteers in the WordPress.org support forums may be able to help.' );
694			$body .= "\n" . __( 'https://wordpress.org/support/' );
695		}
696
697		// Updates are important!
698		if ( $type != 'success' || $newer_version_available ) {
699			$body .= "\n\n" . __( 'Keeping your site updated is important for security. It also makes the internet a safer place for you and your readers.' );
700		}
701
702		if ( $critical_support ) {
703			$body .= " " . __( "If you reach out to us, we'll also ensure you'll never have this problem again." );
704		}
705
706		// If things are successful and we're now on the latest, mention plugins and themes if any are out of date.
707		if ( $type == 'success' && ! $newer_version_available && ( get_plugin_updates() || get_theme_updates() ) ) {
708			$body .= "\n\n" . __( 'You also have some plugins or themes with updates available. Update them now:' );
709			$body .= "\n" . network_admin_url();
710		}
711
712		$body .= "\n\n" . __( 'The WordPress Team' ) . "\n";
713
714		if ( 'critical' == $type && is_wp_error( $result ) ) {
715			$body .= "\n***\n\n";
716			$body .= sprintf( __( 'Your site was running version %s.' ), get_bloginfo( 'version' ) );
717			$body .= ' ' . __( 'We have some data that describes the error your site encountered.' );
718			$body .= ' ' . __( 'Your hosting company, support forum volunteers, or a friendly developer may be able to use this information to help you:' );
719
720			// If we had a rollback and we're still critical, then the rollback failed too.
721			// Loop through all errors (the main WP_Error, the update result, the rollback result) for code, data, etc.
722			if ( 'rollback_was_required' == $result->get_error_code() )
723				$errors = array( $result, $result->get_error_data()->update, $result->get_error_data()->rollback );
724			else
725				$errors = array( $result );
726
727			foreach ( $errors as $error ) {
728				if ( ! is_wp_error( $error ) )
729					continue;
730				$error_code = $error->get_error_code();
731				$body .= "\n\n" . sprintf( __( "Error code: %s" ), $error_code );
732				if ( 'rollback_was_required' == $error_code )
733					continue;
734				if ( $error->get_error_message() )
735					$body .= "\n" . $error->get_error_message();
736				$error_data = $error->get_error_data();
737				if ( $error_data )
738					$body .= "\n" . implode( ', ', (array) $error_data );
739			}
740			$body .= "\n";
741		}
742
743		$to  = get_site_option( 'admin_email' );
744		$headers = '';
745
746		$email = compact( 'to', 'subject', 'body', 'headers' );
747
748		/**
749		 * Filters the email sent following an automatic background core update.
750		 *
751		 * @since 3.7.0
752		 *
753		 * @param array $email {
754		 *     Array of email arguments that will be passed to wp_mail().
755		 *
756		 *     @type string $to      The email recipient. An array of emails
757		 *                            can be returned, as handled by wp_mail().
758		 *     @type string $subject The email's subject.
759		 *     @type string $body    The email message body.
760		 *     @type string $headers Any email headers, defaults to no headers.
761		 * }
762		 * @param string $type        The type of email being sent. Can be one of
763		 *                            'success', 'fail', 'manual', 'critical'.
764		 * @param object $core_update The update offer that was attempted.
765		 * @param mixed  $result      The result for the core update. Can be WP_Error.
766		 */
767		$email = apply_filters( 'auto_core_update_email', $email, $type, $core_update, $result );
768
769		wp_mail( $email['to'], wp_specialchars_decode( $email['subject'] ), $email['body'], $email['headers'] );
770	}
771
772	/**
773	 * Prepares and sends an email of a full log of background update results, useful for debugging and geekery.
774	 *
775	 * @since 3.7.0
776	 * @access protected
777	 */
778	protected function send_debug_email() {
779		$update_count = 0;
780		foreach ( $this->update_results as $type => $updates )
781			$update_count += count( $updates );
782
783		$body = array();
784		$failures = 0;
785
786		$body[] = sprintf( __( 'WordPress site: %s' ), network_home_url( '/' ) );
787
788		// Core
789		if ( isset( $this->update_results['core'] ) ) {
790			$result = $this->update_results['core'][0];
791			if ( $result->result && ! is_wp_error( $result->result ) ) {
792				$body[] = sprintf( __( 'SUCCESS: WordPress was successfully updated to %s' ), $result->name );
793			} else {
794				$body[] = sprintf( __( 'FAILED: WordPress failed to update to %s' ), $result->name );
795				$failures++;
796			}
797			$body[] = '';
798		}
799
800		// Plugins, Themes, Translations
801		foreach ( array( 'plugin', 'theme', 'translation' ) as $type ) {
802			if ( ! isset( $this->update_results[ $type ] ) )
803				continue;
804			$success_items = wp_list_filter( $this->update_results[ $type ], array( 'result' => true ) );
805			if ( $success_items ) {
806				$messages = array(
807					'plugin'      => __( 'The following plugins were successfully updated:' ),
808					'theme'       => __( 'The following themes were successfully updated:' ),
809					'translation' => __( 'The following translations were successfully updated:' ),
810				);
811
812				$body[] = $messages[ $type ];
813				foreach ( wp_list_pluck( $success_items, 'name' ) as $name ) {
814					$body[] = ' * ' . sprintf( __( 'SUCCESS: %s' ), $name );
815				}
816			}
817			if ( $success_items != $this->update_results[ $type ] ) {
818				// Failed updates
819				$messages = array(
820					'plugin'      => __( 'The following plugins failed to update:' ),
821					'theme'       => __( 'The following themes failed to update:' ),
822					'translation' => __( 'The following translations failed to update:' ),
823				);
824
825				$body[] = $messages[ $type ];
826				foreach ( $this->update_results[ $type ] as $item ) {
827					if ( ! $item->result || is_wp_error( $item->result ) ) {
828						$body[] = ' * ' . sprintf( __( 'FAILED: %s' ), $item->name );
829						$failures++;
830					}
831				}
832			}
833			$body[] = '';
834		}
835
836		$site_title = wp_specialchars_decode( get_bloginfo( 'name' ), ENT_QUOTES );
837		if ( $failures ) {
838			$body[] = trim( __(
839"BETA TESTING?
840=============
841
842This debugging email is sent when you are using a development version of WordPress.
843
844If you think these failures might be due to a bug in WordPress, could you report it?
845 * Open a thread in the support forums: https://wordpress.org/support/forum/alphabeta
846 * Or, if you're comfortable writing a bug report: https://core.trac.wordpress.org/
847
848Thanks! -- The WordPress Team" ) );
849			$body[] = '';
850
851			$subject = sprintf( __( '[%s] There were failures during background updates' ), $site_title );
852		} else {
853			$subject = sprintf( __( '[%s] Background updates have finished' ), $site_title );
854		}
855
856		$body[] = trim( __(
857'UPDATE LOG
858==========' ) );
859		$body[] = '';
860
861		foreach ( array( 'core', 'plugin', 'theme', 'translation' ) as $type ) {
862			if ( ! isset( $this->update_results[ $type ] ) )
863				continue;
864			foreach ( $this->update_results[ $type ] as $update ) {
865				$body[] = $update->name;
866				$body[] = str_repeat( '-', strlen( $update->name ) );
867				foreach ( $update->messages as $message )
868					$body[] = "  " . html_entity_decode( str_replace( '&#8230;', '...', $message ) );
869				if ( is_wp_error( $update->result ) ) {
870					$results = array( 'update' => $update->result );
871					// If we rolled back, we want to know an error that occurred then too.
872					if ( 'rollback_was_required' === $update->result->get_error_code() )
873						$results = (array) $update->result->get_error_data();
874					foreach ( $results as $result_type => $result ) {
875						if ( ! is_wp_error( $result ) )
876							continue;
877
878						if ( 'rollback' === $result_type ) {
879							/* translators: 1: Error code, 2: Error message. */
880							$body[] = '  ' . sprintf( __( 'Rollback Error: [%1$s] %2$s' ), $result->get_error_code(), $result->get_error_message() );
881						} else {
882							/* translators: 1: Error code, 2: Error message. */
883							$body[] = '  ' . sprintf( __( 'Error: [%1$s] %2$s' ), $result->get_error_code(), $result->get_error_message() );
884						}
885
886						if ( $result->get_error_data() )
887							$body[] = '         ' . implode( ', ', (array) $result->get_error_data() );
888					}
889				}
890				$body[] = '';
891			}
892		}
893
894		$email = array(
895			'to'      => get_site_option( 'admin_email' ),
896			'subject' => $subject,
897			'body'    => implode( "\n", $body ),
898			'headers' => ''
899		);
900
901		/**
902		 * Filters the debug email that can be sent following an automatic
903		 * background core update.
904		 *
905		 * @since 3.8.0
906		 *
907		 * @param array $email {
908		 *     Array of email arguments that will be passed to wp_mail().
909		 *
910		 *     @type string $to      The email recipient. An array of emails
911		 *                           can be returned, as handled by wp_mail().
912		 *     @type string $subject Email subject.
913		 *     @type string $body    Email message body.
914		 *     @type string $headers Any email headers. Default empty.
915		 * }
916		 * @param int   $failures The number of failures encountered while upgrading.
917		 * @param mixed $results  The results of all attempted updates.
918		 */
919		$email = apply_filters( 'automatic_updates_debug_email', $email, $failures, $this->update_results );
920
921		wp_mail( $email['to'], wp_specialchars_decode( $email['subject'] ), $email['body'], $email['headers'] );
922	}
923}