1<?php
2/**
3 * Upgrade API: WP_Upgrader class
4 *
5 * Requires skin classes and WP_Upgrader subclasses for backward compatibility.
6 *
7 * @package WordPress
8 * @subpackage Upgrader
9 * @since 2.8.0
10 */
11
12/** WP_Upgrader_Skin class */
13require_once ABSPATH . 'wp-admin/includes/class-wp-upgrader-skin.php';
14
15/** Plugin_Upgrader_Skin class */
16require_once ABSPATH . 'wp-admin/includes/class-plugin-upgrader-skin.php';
17
18/** Theme_Upgrader_Skin class */
19require_once ABSPATH . 'wp-admin/includes/class-theme-upgrader-skin.php';
20
21/** Bulk_Upgrader_Skin class */
22require_once ABSPATH . 'wp-admin/includes/class-bulk-upgrader-skin.php';
23
24/** Bulk_Plugin_Upgrader_Skin class */
25require_once ABSPATH . 'wp-admin/includes/class-bulk-plugin-upgrader-skin.php';
26
27/** Bulk_Theme_Upgrader_Skin class */
28require_once ABSPATH . 'wp-admin/includes/class-bulk-theme-upgrader-skin.php';
29
30/** Plugin_Installer_Skin class */
31require_once ABSPATH . 'wp-admin/includes/class-plugin-installer-skin.php';
32
33/** Theme_Installer_Skin class */
34require_once ABSPATH . 'wp-admin/includes/class-theme-installer-skin.php';
35
36/** Language_Pack_Upgrader_Skin class */
37require_once ABSPATH . 'wp-admin/includes/class-language-pack-upgrader-skin.php';
38
39/** Automatic_Upgrader_Skin class */
40require_once ABSPATH . 'wp-admin/includes/class-automatic-upgrader-skin.php';
41
42/** WP_Ajax_Upgrader_Skin class */
43require_once ABSPATH . 'wp-admin/includes/class-wp-ajax-upgrader-skin.php';
44
45/**
46 * Core class used for upgrading/installing a local set of files via
47 * the Filesystem Abstraction classes from a Zip file.
48 *
49 * @since 2.8.0
50 */
51#[AllowDynamicProperties]
52class WP_Upgrader {
53
54 /**
55 * The error/notification strings used to update the user on the progress.
56 *
57 * @since 2.8.0
58 * @var array $strings
59 */
60 public $strings = array();
61
62 /**
63 * The upgrader skin being used.
64 *
65 * @since 2.8.0
66 * @var Automatic_Upgrader_Skin|WP_Upgrader_Skin $skin
67 */
68 public $skin = null;
69
70 /**
71 * The result of the installation.
72 *
73 * This is set by WP_Upgrader::install_package(), only when the package is installed
74 * successfully. It will then be an array, unless a WP_Error is returned by the
75 * {@see 'upgrader_post_install'} filter. In that case, the WP_Error will be assigned to
76 * it.
77 *
78 * @since 2.8.0
79 *
80 * @var array|WP_Error $result {
81 * @type string $source The full path to the source the files were installed from.
82 * @type string $source_files List of all the files in the source directory.
83 * @type string $destination The full path to the installation destination folder.
84 * @type string $destination_name The name of the destination folder, or empty if `$destination`
85 * and `$local_destination` are the same.
86 * @type string $local_destination The full local path to the destination folder. This is usually
87 * the same as `$destination`.
88 * @type string $remote_destination The full remote path to the destination folder
89 * (i.e., from `$wp_filesystem`).
90 * @type bool $clear_destination Whether the destination folder was cleared.
91 * }
92 */
93 public $result = array();
94
95 /**
96 * The total number of updates being performed.
97 *
98 * Set by the bulk update methods.
99 *
100 * @since 3.0.0
101 * @var int $update_count
102 */
103 public $update_count = 0;
104
105 /**
106 * The current update if multiple updates are being performed.
107 *
108 * Used by the bulk update methods, and incremented for each update.
109 *
110 * @since 3.0.0
111 * @var int
112 */
113 public $update_current = 0;
114
115 /**
116 * Stores the list of plugins or themes added to temporary backup directory.
117 *
118 * Used by the rollback functions.
119 *
120 * @since 6.3.0
121 * @var array
122 */
123 private $temp_backups = array();
124
125 /**
126 * Stores the list of plugins or themes to be restored from temporary backup directory.
127 *
128 * Used by the rollback functions.
129 *
130 * @since 6.3.0
131 * @var array
132 */
133 private $temp_restores = array();
134
135 /**
136 * Construct the upgrader with a skin.
137 *
138 * @since 2.8.0
139 *
140 * @param WP_Upgrader_Skin $skin The upgrader skin to use. Default is a WP_Upgrader_Skin
141 * instance.
142 */
143 public function __construct( $skin = null ) {
144 if ( null === $skin ) {
145 $this->skin = new WP_Upgrader_Skin();
146 } else {
147 $this->skin = $skin;
148 }
149 }
150
151 /**
152 * Initializes the upgrader.
153 *
154 * This will set the relationship between the skin being used and this upgrader,
155 * and also add the generic strings to `WP_Upgrader::$strings`.
156 *
157 * Additionally, it will schedule a weekly task to clean up the temporary backup directory.
158 *
159 * @since 2.8.0
160 * @since 6.3.0 Added the `schedule_temp_backup_cleanup()` task.
161 */
162 public function init() {
163 $this->skin->set_upgrader( $this );
164 $this->generic_strings();
165
166 if ( ! wp_installing() ) {
167 $this->schedule_temp_backup_cleanup();
168 }
169 }
170
171 /**
172 * Schedules the cleanup of the temporary backup directory.
173 *
174 * @since 6.3.0
175 */
176 protected function schedule_temp_backup_cleanup() {
177 if ( false === wp_next_scheduled( 'wp_delete_temp_updater_backups' ) ) {
178 wp_schedule_event( time(), 'weekly', 'wp_delete_temp_updater_backups' );
179 }
180 }
181
182 /**
183 * Adds the generic strings to WP_Upgrader::$strings.
184 *
185 * @since 2.8.0
186 */
187 public function generic_strings() {
188 $this->strings['bad_request'] = __( 'Invalid data provided.' );
189 $this->strings['fs_unavailable'] = __( 'Could not access filesystem.' );
190 $this->strings['fs_error'] = __( 'Filesystem error.' );
191 $this->strings['fs_no_root_dir'] = __( 'Unable to locate WordPress root directory.' );
192 /* translators: %s: Directory name. */
193 $this->strings['fs_no_content_dir'] = sprintf( __( 'Unable to locate WordPress content directory (%s).' ), 'wp-content' );
194 $this->strings['fs_no_plugins_dir'] = __( 'Unable to locate WordPress plugin directory.' );
195 $this->strings['fs_no_themes_dir'] = __( 'Unable to locate WordPress theme directory.' );
196 /* translators: %s: Directory name. */
197 $this->strings['fs_no_folder'] = __( 'Unable to locate needed folder (%s).' );
198
199 $this->strings['no_package'] = __( 'Package not available.' );
200 $this->strings['download_failed'] = __( 'Download failed.' );
201 $this->strings['installing_package'] = __( 'Installing the latest version…' );
202 $this->strings['no_files'] = __( 'The package contains no files.' );
203 $this->strings['folder_exists'] = __( 'Destination folder already exists.' );
204 $this->strings['mkdir_failed'] = __( 'Could not create directory.' );
205 $this->strings['incompatible_archive'] = __( 'The package could not be installed.' );
206 $this->strings['files_not_writable'] = __( 'The update cannot be installed because some files could not be copied. This is usually due to inconsistent file permissions.' );
207 $this->strings['dir_not_readable'] = __( 'A directory could not be read.' );
208
209 $this->strings['maintenance_start'] = __( 'Enabling Maintenance mode…' );
210 $this->strings['maintenance_end'] = __( 'Disabling Maintenance mode…' );
211
212 /* translators: %s: upgrade-temp-backup */
213 $this->strings['temp_backup_mkdir_failed'] = sprintf( __( 'Could not create the %s directory.' ), 'upgrade-temp-backup' );
214 /* translators: %s: upgrade-temp-backup */
215 $this->strings['temp_backup_move_failed'] = sprintf( __( 'Could not move the old version to the %s directory.' ), 'upgrade-temp-backup' );
216 /* translators: %s: The plugin or theme slug. */
217 $this->strings['temp_backup_restore_failed'] = __( 'Could not restore the original version of %s.' );
218 /* translators: %s: The plugin or theme slug. */
219 $this->strings['temp_backup_delete_failed'] = __( 'Could not delete the temporary backup directory for %s.' );
220 }
221
222 /**
223 * Connects to the filesystem.
224 *
225 * @since 2.8.0
226 *
227 * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
228 *
229 * @param string[] $directories Optional. Array of directories. If any of these do
230 * not exist, a WP_Error object will be returned.
231 * Default empty array.
232 * @param bool $allow_relaxed_file_ownership Whether to allow relaxed file ownership.
233 * Default false.
234 * @return bool|WP_Error True if able to connect, false or a WP_Error otherwise.
235 */
236 public function fs_connect( $directories = array(), $allow_relaxed_file_ownership = false ) {
237 global $wp_filesystem;
238
239 $credentials = $this->skin->request_filesystem_credentials( false, $directories[0], $allow_relaxed_file_ownership );
240 if ( false === $credentials ) {
241 return false;
242 }
243
244 if ( ! WP_Filesystem( $credentials, $directories[0], $allow_relaxed_file_ownership ) ) {
245 $error = true;
246 if ( is_object( $wp_filesystem ) && $wp_filesystem->errors->has_errors() ) {
247 $error = $wp_filesystem->errors;
248 }
249 // Failed to connect. Error and request again.
250 $this->skin->request_filesystem_credentials( $error, $directories[0], $allow_relaxed_file_ownership );
251 return false;
252 }
253
254 if ( ! is_object( $wp_filesystem ) ) {
255 return new WP_Error( 'fs_unavailable', $this->strings['fs_unavailable'] );
256 }
257
258 if ( is_wp_error( $wp_filesystem->errors ) && $wp_filesystem->errors->has_errors() ) {
259 return new WP_Error( 'fs_error', $this->strings['fs_error'], $wp_filesystem->errors );
260 }
261
262 foreach ( (array) $directories as $dir ) {
263 switch ( $dir ) {
264 case ABSPATH:
265 if ( ! $wp_filesystem->abspath() ) {
266 return new WP_Error( 'fs_no_root_dir', $this->strings['fs_no_root_dir'] );
267 }
268 break;
269 case WP_CONTENT_DIR:
270 if ( ! $wp_filesystem->wp_content_dir() ) {
271 return new WP_Error( 'fs_no_content_dir', $this->strings['fs_no_content_dir'] );
272 }
273 break;
274 case WP_PLUGIN_DIR:
275 if ( ! $wp_filesystem->wp_plugins_dir() ) {
276 return new WP_Error( 'fs_no_plugins_dir', $this->strings['fs_no_plugins_dir'] );
277 }
278 break;
279 case get_theme_root():
280 if ( ! $wp_filesystem->wp_themes_dir() ) {
281 return new WP_Error( 'fs_no_themes_dir', $this->strings['fs_no_themes_dir'] );
282 }
283 break;
284 default:
285 if ( ! $wp_filesystem->find_folder( $dir ) ) {
286 return new WP_Error( 'fs_no_folder', sprintf( $this->strings['fs_no_folder'], esc_html( basename( $dir ) ) ) );
287 }
288 break;
289 }
290 }
291 return true;
292 }
293
294 /**
295 * Downloads a package.
296 *
297 * @since 2.8.0
298 * @since 5.2.0 Added the `$check_signatures` parameter.
299 * @since 5.5.0 Added the `$hook_extra` parameter.
300 *
301 * @param string $package The URI of the package. If this is the full path to an
302 * existing local file, it will be returned untouched.
303 * @param bool $check_signatures Whether to validate file signatures. Default false.
304 * @param array $hook_extra Extra arguments to pass to the filter hooks. Default empty array.
305 * @return string|WP_Error The full path to the downloaded package file, or a WP_Error object.
306 */
307 public function download_package( $package, $check_signatures = false, $hook_extra = array() ) {
308 /**
309 * Filters whether to return the package.
310 *
311 * @since 3.7.0
312 * @since 5.5.0 Added the `$hook_extra` parameter.
313 *
314 * @param bool $reply Whether to bail without returning the package.
315 * Default false.
316 * @param string $package The package file name.
317 * @param WP_Upgrader $upgrader The WP_Upgrader instance.
318 * @param array $hook_extra Extra arguments passed to hooked filters.
319 */
320 $reply = apply_filters( 'upgrader_pre_download', false, $package, $this, $hook_extra );
321 if ( false !== $reply ) {
322 return $reply;
323 }
324
325 if ( ! preg_match( '!^(http|https|ftp)://!i', $package ) && file_exists( $package ) ) { // Local file or remote?
326 return $package; // Must be a local file.
327 }
328
329 if ( empty( $package ) ) {
330 return new WP_Error( 'no_package', $this->strings['no_package'] );
331 }
332
333 $this->skin->feedback( 'downloading_package', $package );
334
335 $download_file = download_url( $package, 300, $check_signatures );
336
337 if ( is_wp_error( $download_file ) && ! $download_file->get_error_data( 'softfail-filename' ) ) {
338 return new WP_Error( 'download_failed', $this->strings['download_failed'], $download_file->get_error_message() );
339 }
340
341 return $download_file;
342 }
343
344 /**
345 * Unpacks a compressed package file.
346 *
347 * @since 2.8.0
348 *
349 * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
350 *
351 * @param string $package Full path to the package file.
352 * @param bool $delete_package Optional. Whether to delete the package file after attempting
353 * to unpack it. Default true.
354 * @return string|WP_Error The path to the unpacked contents, or a WP_Error on failure.
355 */
356 public function unpack_package( $package, $delete_package = true ) {
357 global $wp_filesystem;
358
359 $this->skin->feedback( 'unpack_package' );
360
361 if ( ! $wp_filesystem->wp_content_dir() ) {
362 return new WP_Error( 'fs_no_content_dir', $this->strings['fs_no_content_dir'] );
363 }
364
365 $upgrade_folder = $wp_filesystem->wp_content_dir() . 'upgrade/';
366
367 // Clean up contents of upgrade directory beforehand.
368 $upgrade_files = $wp_filesystem->dirlist( $upgrade_folder );
369 if ( ! empty( $upgrade_files ) ) {
370 foreach ( $upgrade_files as $file ) {
371 $wp_filesystem->delete( $upgrade_folder . $file['name'], true );
372 }
373 }
374
375 // We need a working directory - strip off any .tmp or .zip suffixes.
376 $working_dir = $upgrade_folder . basename( basename( $package, '.tmp' ), '.zip' );
377
378 // Clean up working directory.
379 if ( $wp_filesystem->is_dir( $working_dir ) ) {
380 $wp_filesystem->delete( $working_dir, true );
381 }
382
383 // Unzip package to working directory.
384 $result = unzip_file( $package, $working_dir );
385
386 // Once extracted, delete the package if required.
387 if ( $delete_package ) {
388 unlink( $package );
389 }
390
391 if ( is_wp_error( $result ) ) {
392 $wp_filesystem->delete( $working_dir, true );
393 if ( 'incompatible_archive' === $result->get_error_code() ) {
394 return new WP_Error( 'incompatible_archive', $this->strings['incompatible_archive'], $result->get_error_data() );
395 }
396 return $result;
397 }
398
399 return $working_dir;
400 }
401
402 /**
403 * Flattens the results of WP_Filesystem_Base::dirlist() for iterating over.
404 *
405 * @since 4.9.0
406 *
407 * @param array $nested_files Array of files as returned by WP_Filesystem_Base::dirlist().
408 * @param string $path Relative path to prepend to child nodes. Optional.
409 * @return array A flattened array of the $nested_files specified.
410 */
411 protected function flatten_dirlist( $nested_files, $path = '' ) {
412 $files = array();
413
414 foreach ( $nested_files as $name => $details ) {
415 $files[ $path . $name ] = $details;
416
417 // Append children recursively.
418 if ( ! empty( $details['files'] ) ) {
419 $children = $this->flatten_dirlist( $details['files'], $path . $name . '/' );
420
421 // Merge keeping possible numeric keys, which array_merge() will reindex from 0..n.
422 $files = $files + $children;
423 }
424 }
425
426 return $files;
427 }
428
429 /**
430 * Clears the directory where this item is going to be installed into.
431 *
432 * @since 4.3.0
433 *
434 * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
435 *
436 * @param string $remote_destination The location on the remote filesystem to be cleared.
437 * @return true|WP_Error True upon success, WP_Error on failure.
438 */
439 public function clear_destination( $remote_destination ) {
440 global $wp_filesystem;
441
442 $files = $wp_filesystem->dirlist( $remote_destination, true, true );
443
444 // False indicates that the $remote_destination doesn't exist.
445 if ( false === $files ) {
446 return true;
447 }
448
449 // Flatten the file list to iterate over.
450 $files = $this->flatten_dirlist( $files );
451
452 // Check all files are writable before attempting to clear the destination.
453 $unwritable_files = array();
454
455 // Check writability.
456 foreach ( $files as $filename => $file_details ) {
457 if ( ! $wp_filesystem->is_writable( $remote_destination . $filename ) ) {
458 // Attempt to alter permissions to allow writes and try again.
459 $wp_filesystem->chmod( $remote_destination . $filename, ( 'd' === $file_details['type'] ? FS_CHMOD_DIR : FS_CHMOD_FILE ) );
460 if ( ! $wp_filesystem->is_writable( $remote_destination . $filename ) ) {
461 $unwritable_files[] = $filename;
462 }
463 }
464 }
465
466 if ( ! empty( $unwritable_files ) ) {
467 return new WP_Error( 'files_not_writable', $this->strings['files_not_writable'], implode( ', ', $unwritable_files ) );
468 }
469
470 if ( ! $wp_filesystem->delete( $remote_destination, true ) ) {
471 return new WP_Error( 'remove_old_failed', $this->strings['remove_old_failed'] );
472 }
473
474 return true;
475 }
476
477 /**
478 * Install a package.
479 *
480 * Copies the contents of a package from a source directory, and installs them in
481 * a destination directory. Optionally removes the source. It can also optionally
482 * clear out the destination folder if it already exists.
483 *
484 * @since 2.8.0
485 * @since 6.2.0 Use move_dir() instead of copy_dir() when possible.
486 *
487 * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
488 * @global string[] $wp_theme_directories
489 *
490 * @param array|string $args {
491 * Optional. Array or string of arguments for installing a package. Default empty array.
492 *
493 * @type string $source Required path to the package source. Default empty.
494 * @type string $destination Required path to a folder to install the package in.
495 * Default empty.
496 * @type bool $clear_destination Whether to delete any files already in the destination
497 * folder. Default false.
498 * @type bool $clear_working Whether to delete the files from the working directory
499 * after copying them to the destination. Default false.
500 * @type bool $abort_if_destination_exists Whether to abort the installation if
501 * the destination folder already exists. Default true.
502 * @type array $hook_extra Extra arguments to pass to the filter hooks called by
503 * WP_Upgrader::install_package(). Default empty array.
504 * }
505 *
506 * @return array|WP_Error The result (also stored in `WP_Upgrader::$result`), or a WP_Error on failure.
507 */
508 public function install_package( $args = array() ) {
509 global $wp_filesystem, $wp_theme_directories;
510
511 $defaults = array(
512 'source' => '', // Please always pass this.
513 'destination' => '', // ...and this.
514 'clear_destination' => false,
515 'clear_working' => false,
516 'abort_if_destination_exists' => true,
517 'hook_extra' => array(),
518 );
519
520 $args = wp_parse_args( $args, $defaults );
521
522 // These were previously extract()'d.
523 $source = $args['source'];
524 $destination = $args['destination'];
525 $clear_destination = $args['clear_destination'];
526
527 /*
528 * Give the upgrade an additional 300 seconds (5 minutes) to ensure the install
529 * doesn't prematurely timeout having used up the maximum script execution time
530 * upacking and downloading in WP_Upgrader->run().
531 */
532 if ( function_exists( 'set_time_limit' ) ) {
533 set_time_limit( 300 );
534 }
535
536 if (
537 ( ! is_string( $source ) || '' === $source || trim( $source ) !== $source ) ||
538 ( ! is_string( $destination ) || '' === $destination || trim( $destination ) !== $destination )
539 ) {
540 return new WP_Error( 'bad_request', $this->strings['bad_request'] );
541 }
542 $this->skin->feedback( 'installing_package' );
543
544 /**
545 * Filters the installation response before the installation has started.
546 *
547 * Returning a value that could be evaluated as a `WP_Error` will effectively
548 * short-circuit the installation, returning that value instead.
549 *
550 * @since 2.8.0
551 *
552 * @param bool|WP_Error $response Installation response.
553 * @param array $hook_extra Extra arguments passed to hooked filters.
554 */
555 $res = apply_filters( 'upgrader_pre_install', true, $args['hook_extra'] );
556
557 if ( is_wp_error( $res ) ) {
558 return $res;
559 }
560
561 // Retain the original source and destinations.
562 $remote_source = $args['source'];
563 $local_destination = $destination;
564
565 $dirlist = $wp_filesystem->dirlist( $remote_source );
566
567 if ( false === $dirlist ) {
568 return new WP_Error( 'source_read_failed', $this->strings['fs_error'], $this->strings['dir_not_readable'] );
569 }
570
571 $source_files = array_keys( $dirlist );
572 $remote_destination = $wp_filesystem->find_folder( $local_destination );
573
574 // Locate which directory to copy to the new folder. This is based on the actual folder holding the files.
575 if ( 1 === count( $source_files ) && $wp_filesystem->is_dir( trailingslashit( $args['source'] ) . $source_files[0] . '/' ) ) {
576 // Only one folder? Then we want its contents.
577 $source = trailingslashit( $args['source'] ) . trailingslashit( $source_files[0] );
578 } elseif ( 0 === count( $source_files ) ) {
579 // There are no files?
580 return new WP_Error( 'incompatible_archive_empty', $this->strings['incompatible_archive'], $this->strings['no_files'] );
581 } else {
582 /*
583 * It's only a single file, the upgrader will use the folder name of this file as the destination folder.
584 * Folder name is based on zip filename.
585 */
586 $source = trailingslashit( $args['source'] );
587 }
588
589 /**
590 * Filters the source file location for the upgrade package.
591 *
592 * @since 2.8.0
593 * @since 4.4.0 The $hook_extra parameter became available.
594 *
595 * @param string $source File source location.
596 * @param string $remote_source Remote file source location.
597 * @param WP_Upgrader $upgrader WP_Upgrader instance.
598 * @param array $hook_extra Extra arguments passed to hooked filters.
599 */
600 $source = apply_filters( 'upgrader_source_selection', $source, $remote_source, $this, $args['hook_extra'] );
601
602 if ( is_wp_error( $source ) ) {
603 return $source;
604 }
605
606 if ( ! empty( $args['hook_extra']['temp_backup'] ) ) {
607 $temp_backup = $this->move_to_temp_backup_dir( $args['hook_extra']['temp_backup'] );
608
609 if ( is_wp_error( $temp_backup ) ) {
610 return $temp_backup;
611 }
612
613 $this->temp_backups[] = $args['hook_extra']['temp_backup'];
614 }
615
616 // Has the source location changed? If so, we need a new source_files list.
617 if ( $source !== $remote_source ) {
618 $dirlist = $wp_filesystem->dirlist( $source );
619
620 if ( false === $dirlist ) {
621 return new WP_Error( 'new_source_read_failed', $this->strings['fs_error'], $this->strings['dir_not_readable'] );
622 }
623
624 $source_files = array_keys( $dirlist );
625 }
626
627 /*
628 * Protection against deleting files in any important base directories.
629 * Theme_Upgrader & Plugin_Upgrader also trigger this, as they pass the
630 * destination directory (WP_PLUGIN_DIR / wp-content/themes) intending
631 * to copy the directory into the directory, whilst they pass the source
632 * as the actual files to copy.
633 */
634 $protected_directories = array( ABSPATH, WP_CONTENT_DIR, WP_PLUGIN_DIR, WP_CONTENT_DIR . '/themes' );
635
636 if ( is_array( $wp_theme_directories ) ) {
637 $protected_directories = array_merge( $protected_directories, $wp_theme_directories );
638 }
639
640 if ( in_array( $destination, $protected_directories, true ) ) {
641 $remote_destination = trailingslashit( $remote_destination ) . trailingslashit( basename( $source ) );
642 $destination = trailingslashit( $destination ) . trailingslashit( basename( $source ) );
643 }
644
645 if ( $clear_destination ) {
646 // We're going to clear the destination if there's something there.
647 $this->skin->feedback( 'remove_old' );
648
649 $removed = $this->clear_destination( $remote_destination );
650
651 /**
652 * Filters whether the upgrader cleared the destination.
653 *
654 * @since 2.8.0
655 *
656 * @param true|WP_Error $removed Whether the destination was cleared.
657 * True upon success, WP_Error on failure.
658 * @param string $local_destination The local package destination.
659 * @param string $remote_destination The remote package destination.
660 * @param array $hook_extra Extra arguments passed to hooked filters.
661 */
662 $removed = apply_filters( 'upgrader_clear_destination', $removed, $local_destination, $remote_destination, $args['hook_extra'] );
663
664 if ( is_wp_error( $removed ) ) {
665 return $removed;
666 }
667 } elseif ( $args['abort_if_destination_exists'] && $wp_filesystem->exists( $remote_destination ) ) {
668 /*
669 * If we're not clearing the destination folder and something exists there already, bail.
670 * But first check to see if there are actually any files in the folder.
671 */
672 $_files = $wp_filesystem->dirlist( $remote_destination );
673 if ( ! empty( $_files ) ) {
674 $wp_filesystem->delete( $remote_source, true ); // Clear out the source files.
675 return new WP_Error( 'folder_exists', $this->strings['folder_exists'], $remote_destination );
676 }
677 }
678
679 /*
680 * If 'clear_working' is false, the source should not be removed, so use copy_dir() instead.
681 *
682 * Partial updates, like language packs, may want to retain the destination.
683 * If the destination exists or has contents, this may be a partial update,
684 * and the destination should not be removed, so use copy_dir() instead.
685 */
686 if ( $args['clear_working']
687 && (
688 // Destination does not exist or has no contents.
689 ! $wp_filesystem->exists( $remote_destination )
690 || empty( $wp_filesystem->dirlist( $remote_destination ) )
691 )
692 ) {
693 $result = move_dir( $source, $remote_destination, true );
694 } else {
695 // Create destination if needed.
696 if ( ! $wp_filesystem->exists( $remote_destination ) ) {
697 if ( ! $wp_filesystem->mkdir( $remote_destination, FS_CHMOD_DIR ) ) {
698 return new WP_Error( 'mkdir_failed_destination', $this->strings['mkdir_failed'], $remote_destination );
699 }
700 }
701 $result = copy_dir( $source, $remote_destination );
702 }
703
704 // Clear the working directory?
705 if ( $args['clear_working'] ) {
706 $wp_filesystem->delete( $remote_source, true );
707 }
708
709 if ( is_wp_error( $result ) ) {
710 return $result;
711 }
712
713 $destination_name = basename( str_replace( $local_destination, '', $destination ) );
714 if ( '.' === $destination_name ) {
715 $destination_name = '';
716 }
717
718 $this->result = compact( 'source', 'source_files', 'destination', 'destination_name', 'local_destination', 'remote_destination', 'clear_destination' );
719
720 /**
721 * Filters the installation response after the installation has finished.
722 *
723 * @since 2.8.0
724 *
725 * @param bool $response Installation response.
726 * @param array $hook_extra Extra arguments passed to hooked filters.
727 * @param array $result Installation result data.
728 */
729 $res = apply_filters( 'upgrader_post_install', true, $args['hook_extra'], $this->result );
730
731 if ( is_wp_error( $res ) ) {
732 $this->result = $res;
733 return $res;
734 }
735
736 // Bombard the calling function will all the info which we've just used.
737 return $this->result;
738 }
739
740 /**
741 * Runs an upgrade/installation.
742 *
743 * Attempts to download the package (if it is not a local file), unpack it, and
744 * install it in the destination folder.
745 *
746 * @since 2.8.0
747 *
748 * @param array $options {
749 * Array or string of arguments for upgrading/installing a package.
750 *
751 * @type string $package The full path or URI of the package to install.
752 * Default empty.
753 * @type string $destination The full path to the destination folder.
754 * Default empty.
755 * @type bool $clear_destination Whether to delete any files already in the
756 * destination folder. Default false.
757 * @type bool $clear_working Whether to delete the files from the working
758 * directory after copying them to the destination.
759 * Default true.
760 * @type bool $abort_if_destination_exists Whether to abort the installation if the destination
761 * folder already exists. When true, `$clear_destination`
762 * should be false. Default true.
763 * @type bool $is_multi Whether this run is one of multiple upgrade/installation
764 * actions being performed in bulk. When true, the skin
765 * WP_Upgrader::header() and WP_Upgrader::footer()
766 * aren't called. Default false.
767 * @type array $hook_extra Extra arguments to pass to the filter hooks called by
768 * WP_Upgrader::run().
769 * }
770 * @return array|false|WP_Error The result from self::install_package() on success, otherwise a WP_Error,
771 * or false if unable to connect to the filesystem.
772 */
773 public function run( $options ) {
774
775 $defaults = array(
776 'package' => '', // Please always pass this.
777 'destination' => '', // ...and this.
778 'clear_destination' => false,
779 'clear_working' => true,
780 'abort_if_destination_exists' => true, // Abort if the destination directory exists. Pass clear_destination as false please.
781 'is_multi' => false,
782 'hook_extra' => array(), // Pass any extra $hook_extra args here, this will be passed to any hooked filters.
783 );
784
785 $options = wp_parse_args( $options, $defaults );
786
787 /**
788 * Filters the package options before running an update.
789 *
790 * See also {@see 'upgrader_process_complete'}.
791 *
792 * @since 4.3.0
793 *
794 * @param array $options {
795 * Options used by the upgrader.
796 *
797 * @type string $package Package for update.
798 * @type string $destination Update location.
799 * @type bool $clear_destination Clear the destination resource.
800 * @type bool $clear_working Clear the working resource.
801 * @type bool $abort_if_destination_exists Abort if the Destination directory exists.
802 * @type bool $is_multi Whether the upgrader is running multiple times.
803 * @type array $hook_extra {
804 * Extra hook arguments.
805 *
806 * @type string $action Type of action. Default 'update'.
807 * @type string $type Type of update process. Accepts 'plugin', 'theme', or 'core'.
808 * @type bool $bulk Whether the update process is a bulk update. Default true.
809 * @type string $plugin Path to the plugin file relative to the plugins directory.
810 * @type string $theme The stylesheet or template name of the theme.
811 * @type string $language_update_type The language pack update type. Accepts 'plugin', 'theme',
812 * or 'core'.
813 * @type object $language_update The language pack update offer.
814 * }
815 * }
816 */
817 $options = apply_filters( 'upgrader_package_options', $options );
818
819 if ( ! $options['is_multi'] ) { // Call $this->header separately if running multiple times.
820 $this->skin->header();
821 }
822
823 // Connect to the filesystem first.
824 $res = $this->fs_connect( array( WP_CONTENT_DIR, $options['destination'] ) );
825 // Mainly for non-connected filesystem.
826 if ( ! $res ) {
827 if ( ! $options['is_multi'] ) {
828 $this->skin->footer();
829 }
830 return false;
831 }
832
833 $this->skin->before();
834
835 if ( is_wp_error( $res ) ) {
836 $this->skin->error( $res );
837 $this->skin->after();
838 if ( ! $options['is_multi'] ) {
839 $this->skin->footer();
840 }
841 return $res;
842 }
843
844 /*
845 * Download the package. Note: If the package is the full path
846 * to an existing local file, it will be returned untouched.
847 */
848 $download = $this->download_package( $options['package'], false, $options['hook_extra'] );
849
850 /*
851 * Allow for signature soft-fail.
852 * WARNING: This may be removed in the future.
853 */
854 if ( is_wp_error( $download ) && $download->get_error_data( 'softfail-filename' ) ) {
855
856 // Don't output the 'no signature could be found' failure message for now.
857 if ( 'signature_verification_no_signature' !== $download->get_error_code() || WP_DEBUG ) {
858 // Output the failure error as a normal feedback, and not as an error.
859 $this->skin->feedback( $download->get_error_message() );
860
861 // Report this failure back to WordPress.org for debugging purposes.
862 wp_version_check(
863 array(
864 'signature_failure_code' => $download->get_error_code(),
865 'signature_failure_data' => $download->get_error_data(),
866 )
867 );
868 }
869
870 // Pretend this error didn't happen.
871 $download = $download->get_error_data( 'softfail-filename' );
872 }
873
874 if ( is_wp_error( $download ) ) {
875 $this->skin->error( $download );
876 $this->skin->after();
877 if ( ! $options['is_multi'] ) {
878 $this->skin->footer();
879 }
880 return $download;
881 }
882
883 $delete_package = ( $download !== $options['package'] ); // Do not delete a "local" file.
884
885 // Unzips the file into a temporary directory.
886 $working_dir = $this->unpack_package( $download, $delete_package );
887 if ( is_wp_error( $working_dir ) ) {
888 $this->skin->error( $working_dir );
889 $this->skin->after();
890 if ( ! $options['is_multi'] ) {
891 $this->skin->footer();
892 }
893 return $working_dir;
894 }
895
896 // With the given options, this installs it to the destination directory.
897 $result = $this->install_package(
898 array(
899 'source' => $working_dir,
900 'destination' => $options['destination'],
901 'clear_destination' => $options['clear_destination'],
902 'abort_if_destination_exists' => $options['abort_if_destination_exists'],
903 'clear_working' => $options['clear_working'],
904 'hook_extra' => $options['hook_extra'],
905 )
906 );
907
908 /**
909 * Filters the result of WP_Upgrader::install_package().
910 *
911 * @since 5.7.0
912 *
913 * @param array|WP_Error $result Result from WP_Upgrader::install_package().
914 * @param array $hook_extra Extra arguments passed to hooked filters.
915 */
916 $result = apply_filters( 'upgrader_install_package_result', $result, $options['hook_extra'] );
917
918 $this->skin->set_result( $result );
919
920 if ( is_wp_error( $result ) ) {
921 // An automatic plugin update will have already performed its rollback.
922 if ( ! empty( $options['hook_extra']['temp_backup'] ) ) {
923 $this->temp_restores[] = $options['hook_extra']['temp_backup'];
924
925 /*
926 * Restore the backup on shutdown.
927 * Actions running on `shutdown` are immune to PHP timeouts,
928 * so in case the failure was due to a PHP timeout,
929 * it will still be able to properly restore the previous version.
930 *
931 * Zero arguments are accepted as a string can sometimes be passed
932 * internally during actions, causing an error because
933 * `WP_Upgrader::restore_temp_backup()` expects an array.
934 */
935 add_action( 'shutdown', array( $this, 'restore_temp_backup' ), 10, 0 );
936 }
937 $this->skin->error( $result );
938
939 if ( ! method_exists( $this->skin, 'hide_process_failed' ) || ! $this->skin->hide_process_failed( $result ) ) {
940 $this->skin->feedback( 'process_failed' );
941 }
942 } else {
943 // Installation succeeded.
944 $this->skin->feedback( 'process_success' );
945 }
946
947 $this->skin->after();
948
949 // Clean up the backup kept in the temporary backup directory.
950 if ( ! empty( $options['hook_extra']['temp_backup'] ) ) {
951 // Delete the backup on `shutdown` to avoid a PHP timeout.
952 add_action( 'shutdown', array( $this, 'delete_temp_backup' ), 100, 0 );
953 }
954
955 if ( ! $options['is_multi'] ) {
956
957 /**
958 * Fires when the upgrader process is complete.
959 *
960 * See also {@see 'upgrader_package_options'}.
961 *
962 * @since 3.6.0
963 * @since 3.7.0 Added to WP_Upgrader::run().
964 * @since 4.6.0 `$translations` was added as a possible argument to `$hook_extra`.
965 *
966 * @param WP_Upgrader $upgrader WP_Upgrader instance. In other contexts this might be a
967 * Theme_Upgrader, Plugin_Upgrader, Core_Upgrade, or Language_Pack_Upgrader instance.
968 * @param array $hook_extra {
969 * Array of bulk item update data.
970 *
971 * @type string $action Type of action. Default 'update'.
972 * @type string $type Type of update process. Accepts 'plugin', 'theme', 'translation', or 'core'.
973 * @type bool $bulk Whether the update process is a bulk update. Default true.
974 * @type array $plugins Array of the basename paths of the plugins' main files.
975 * @type array $themes The theme slugs.
976 * @type array $translations {
977 * Array of translations update data.
978 *
979 * @type string $language The locale the translation is for.
980 * @type string $type Type of translation. Accepts 'plugin', 'theme', or 'core'.
981 * @type string $slug Text domain the translation is for. The slug of a theme/plugin or
982 * 'default' for core translations.
983 * @type string $version The version of a theme, plugin, or core.
984 * }
985 * }
986 */
987 do_action( 'upgrader_process_complete', $this, $options['hook_extra'] );
988
989 $this->skin->footer();
990 }
991
992 return $result;
993 }
994
995 /**
996 * Toggles maintenance mode for the site.
997 *
998 * Creates/deletes the maintenance file to enable/disable maintenance mode.
999 *
1000 * @since 2.8.0
1001 *
1002 * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
1003 *
1004 * @param bool $enable True to enable maintenance mode, false to disable.
1005 */
1006 public function maintenance_mode( $enable = false ) {
1007 global $wp_filesystem;
1008
1009 if ( ! $wp_filesystem ) {
1010 if ( ! function_exists( 'WP_Filesystem' ) ) {
1011 require_once ABSPATH . 'wp-admin/includes/file.php';
1012 }
1013
1014 ob_start();
1015 $credentials = request_filesystem_credentials( '' );
1016 ob_end_clean();
1017
1018 if ( false === $credentials || ! WP_Filesystem( $credentials ) ) {
1019 wp_trigger_error( __FUNCTION__, __( 'Could not access filesystem.' ) );
1020 return;
1021 }
1022 }
1023
1024 $file = $wp_filesystem->abspath() . '.maintenance';
1025
1026 if ( $enable ) {
1027 if ( ! wp_doing_cron() ) {
1028 $this->skin->feedback( 'maintenance_start' );
1029 }
1030
1031 // Create maintenance file to signal that we are upgrading.
1032 $maintenance_string = '<?php $upgrading = ' . time() . '; ?>';
1033 $wp_filesystem->delete( $file );
1034 $wp_filesystem->put_contents( $file, $maintenance_string, FS_CHMOD_FILE );
1035 } elseif ( $wp_filesystem->exists( $file ) ) {
1036 if ( ! wp_doing_cron() ) {
1037 $this->skin->feedback( 'maintenance_end' );
1038 }
1039
1040 $wp_filesystem->delete( $file );
1041 }
1042 }
1043
1044 /**
1045 * Creates a lock using WordPress options.
1046 *
1047 * @since 4.5.0
1048 *
1049 * @global wpdb $wpdb The WordPress database abstraction object.
1050 *
1051 * @param string $lock_name The name of this unique lock.
1052 * @param int $release_timeout Optional. The duration in seconds to respect an existing lock.
1053 * Default: 1 hour.
1054 * @return bool False if a lock couldn't be created or if the lock is still valid. True otherwise.
1055 */
1056 public static function create_lock( $lock_name, $release_timeout = null ) {
1057 global $wpdb;
1058 if ( ! $release_timeout ) {
1059 $release_timeout = HOUR_IN_SECONDS;
1060 }
1061 $lock_option = $lock_name . '.lock';
1062
1063 // Try to lock.
1064 $lock_result = $wpdb->query( $wpdb->prepare( "INSERT IGNORE INTO `$wpdb->options` ( `option_name`, `option_value`, `autoload` ) VALUES (%s, %s, 'off') /* LOCK */", $lock_option, time() ) );
1065
1066 if ( ! $lock_result ) {
1067 $lock_result = get_option( $lock_option );
1068
1069 // If a lock couldn't be created, and there isn't a lock, bail.
1070 if ( ! $lock_result ) {
1071 return false;
1072 }
1073
1074 // Check to see if the lock is still valid. If it is, bail.
1075 if ( $lock_result > ( time() - $release_timeout ) ) {
1076 return false;
1077 }
1078
1079 // There must exist an expired lock, clear it and re-gain it.
1080 WP_Upgrader::release_lock( $lock_name );
1081
1082 return WP_Upgrader::create_lock( $lock_name, $release_timeout );
1083 }
1084
1085 // Update the lock, as by this point we've definitely got a lock, just need to fire the actions.
1086 update_option( $lock_option, time(), false );
1087
1088 return true;
1089 }
1090
1091 /**
1092 * Releases an upgrader lock.
1093 *
1094 * @since 4.5.0
1095 *
1096 * @see WP_Upgrader::create_lock()
1097 *
1098 * @param string $lock_name The name of this unique lock.
1099 * @return bool True if the lock was successfully released. False on failure.
1100 */
1101 public static function release_lock( $lock_name ) {
1102 return delete_option( $lock_name . '.lock' );
1103 }
1104
1105 /**
1106 * Moves the plugin or theme being updated into a temporary backup directory.
1107 *
1108 * @since 6.3.0
1109 *
1110 * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
1111 *
1112 * @param string[] $args {
1113 * Array of data for the temporary backup.
1114 *
1115 * @type string $slug Plugin or theme slug.
1116 * @type string $src Path to the root directory for plugins or themes.
1117 * @type string $dir Destination subdirectory name. Accepts 'plugins' or 'themes'.
1118 * }
1119 *
1120 * @return bool|WP_Error True on success, false on early exit, otherwise WP_Error.
1121 */
1122 public function move_to_temp_backup_dir( $args ) {
1123 global $wp_filesystem;
1124
1125 if ( empty( $args['slug'] ) || empty( $args['src'] ) || empty( $args['dir'] ) ) {
1126 return false;
1127 }
1128
1129 /*
1130 * Skip any plugin that has "." as its slug.
1131 * A slug of "." will result in a `$src` value ending in a period.
1132 *
1133 * On Windows, this will cause the 'plugins' folder to be moved,
1134 * and will cause a failure when attempting to call `mkdir()`.
1135 */
1136 if ( '.' === $args['slug'] ) {
1137 return false;
1138 }
1139
1140 if ( ! $wp_filesystem->wp_content_dir() ) {
1141 return new WP_Error( 'fs_no_content_dir', $this->strings['fs_no_content_dir'] );
1142 }
1143
1144 $dest_dir = $wp_filesystem->wp_content_dir() . 'upgrade-temp-backup/';
1145 $sub_dir = $dest_dir . $args['dir'] . '/';
1146
1147 // Create the temporary backup directory if it does not exist.
1148 if ( ! $wp_filesystem->is_dir( $sub_dir ) ) {
1149 if ( ! $wp_filesystem->is_dir( $dest_dir ) ) {
1150 $wp_filesystem->mkdir( $dest_dir, FS_CHMOD_DIR );
1151 }
1152
1153 if ( ! $wp_filesystem->mkdir( $sub_dir, FS_CHMOD_DIR ) ) {
1154 // Could not create the backup directory.
1155 return new WP_Error( 'fs_temp_backup_mkdir', $this->strings['temp_backup_mkdir_failed'] );
1156 }
1157 }
1158
1159 $src_dir = $wp_filesystem->find_folder( $args['src'] );
1160 $src = trailingslashit( $src_dir ) . $args['slug'];
1161 $dest = $dest_dir . trailingslashit( $args['dir'] ) . $args['slug'];
1162
1163 // Delete the temporary backup directory if it already exists.
1164 if ( $wp_filesystem->is_dir( $dest ) ) {
1165 $wp_filesystem->delete( $dest, true );
1166 }
1167
1168 // Move to the temporary backup directory.
1169 $result = move_dir( $src, $dest, true );
1170 if ( is_wp_error( $result ) ) {
1171 return new WP_Error( 'fs_temp_backup_move', $this->strings['temp_backup_move_failed'] );
1172 }
1173
1174 return true;
1175 }
1176
1177 /**
1178 * Restores the plugin or theme from temporary backup.
1179 *
1180 * @since 6.3.0
1181 * @since 6.6.0 Added the `$temp_backups` parameter.
1182 *
1183 * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
1184 *
1185 * @param array[] $temp_backups {
1186 * Optional. An array of temporary backups.
1187 *
1188 * @type array ...$0 {
1189 * Information about the backup.
1190 *
1191 * @type string $dir The temporary backup location in the upgrade-temp-backup directory.
1192 * @type string $slug The item's slug.
1193 * @type string $src The directory where the original is stored. For example, `WP_PLUGIN_DIR`.
1194 * }
1195 * }
1196 * @return bool|WP_Error True on success, false on early exit, otherwise WP_Error.
1197 */
1198 public function restore_temp_backup( array $temp_backups = array() ) {
1199 global $wp_filesystem;
1200
1201 $errors = new WP_Error();
1202
1203 if ( empty( $temp_backups ) ) {
1204 $temp_backups = $this->temp_restores;
1205 }
1206
1207 foreach ( $temp_backups as $args ) {
1208 if ( empty( $args['slug'] ) || empty( $args['src'] ) || empty( $args['dir'] ) ) {
1209 return false;
1210 }
1211
1212 if ( ! $wp_filesystem->wp_content_dir() ) {
1213 $errors->add( 'fs_no_content_dir', $this->strings['fs_no_content_dir'] );
1214 return $errors;
1215 }
1216
1217 $src = $wp_filesystem->wp_content_dir() . 'upgrade-temp-backup/' . $args['dir'] . '/' . $args['slug'];
1218 $dest_dir = $wp_filesystem->find_folder( $args['src'] );
1219 $dest = trailingslashit( $dest_dir ) . $args['slug'];
1220
1221 if ( $wp_filesystem->is_dir( $src ) ) {
1222 // Cleanup.
1223 if ( $wp_filesystem->is_dir( $dest ) && ! $wp_filesystem->delete( $dest, true ) ) {
1224 $errors->add(
1225 'fs_temp_backup_delete',
1226 sprintf( $this->strings['temp_backup_restore_failed'], $args['slug'] )
1227 );
1228 continue;
1229 }
1230
1231 // Move it.
1232 $result = move_dir( $src, $dest, true );
1233 if ( is_wp_error( $result ) ) {
1234 $errors->add(
1235 'fs_temp_backup_delete',
1236 sprintf( $this->strings['temp_backup_restore_failed'], $args['slug'] )
1237 );
1238 continue;
1239 }
1240 }
1241 }
1242
1243 return $errors->has_errors() ? $errors : true;
1244 }
1245
1246 /**
1247 * Deletes a temporary backup.
1248 *
1249 * @since 6.3.0
1250 * @since 6.6.0 Added the `$temp_backups` parameter.
1251 *
1252 * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
1253 *
1254 * @param array[] $temp_backups {
1255 * Optional. An array of temporary backups.
1256 *
1257 * @type array ...$0 {
1258 * Information about the backup.
1259 *
1260 * @type string $dir The temporary backup location in the upgrade-temp-backup directory.
1261 * @type string $slug The item's slug.
1262 * @type string $src The directory where the original is stored. For example, `WP_PLUGIN_DIR`.
1263 * }
1264 * }
1265 * @return bool|WP_Error True on success, false on early exit, otherwise WP_Error.
1266 */
1267 public function delete_temp_backup( array $temp_backups = array() ) {
1268 global $wp_filesystem;
1269
1270 $errors = new WP_Error();
1271
1272 if ( empty( $temp_backups ) ) {
1273 $temp_backups = $this->temp_backups;
1274 }
1275
1276 foreach ( $temp_backups as $args ) {
1277 if ( empty( $args['slug'] ) || empty( $args['dir'] ) ) {
1278 return false;
1279 }
1280
1281 if ( ! $wp_filesystem->wp_content_dir() ) {
1282 $errors->add( 'fs_no_content_dir', $this->strings['fs_no_content_dir'] );
1283 return $errors;
1284 }
1285
1286 $temp_backup_dir = $wp_filesystem->wp_content_dir() . "upgrade-temp-backup/{$args['dir']}/{$args['slug']}";
1287
1288 if ( ! $wp_filesystem->delete( $temp_backup_dir, true ) ) {
1289 $errors->add(
1290 'temp_backup_delete_failed',
1291 sprintf( $this->strings['temp_backup_delete_failed'], $args['slug'] )
1292 );
1293 continue;
1294 }
1295 }
1296
1297 return $errors->has_errors() ? $errors : true;
1298 }
1299}
1300
1301/** Plugin_Upgrader class */
1302require_once ABSPATH . 'wp-admin/includes/class-plugin-upgrader.php';
1303
1304/** Theme_Upgrader class */
1305require_once ABSPATH . 'wp-admin/includes/class-theme-upgrader.php';
1306
1307/** Language_Pack_Upgrader class */
1308require_once ABSPATH . 'wp-admin/includes/class-language-pack-upgrader.php';
1309
1310/** Core_Upgrader class */
1311require_once ABSPATH . 'wp-admin/includes/class-core-upgrader.php';
1312
1313/** File_Upload_Upgrader class */
1314require_once ABSPATH . 'wp-admin/includes/class-file-upload-upgrader.php';
1315
1316/** WP_Automatic_Updater class */
1317require_once ABSPATH . 'wp-admin/includes/class-wp-automatic-updater.php';
1318