wp-admin/includes/class-wp-upgrader.php

   1 <?php
   2 /**
   3  * A File upgrader class for WordPress.
   4  *
   5  * This set of classes are designed to be used to upgrade/install a local set of files on the filesystem via the Filesystem Abstraction classes.
   6  *
   7  * @link http://trac.wordpress.org/ticket/7875 consolidate plugin/theme/core upgrade/install functions
   8  *
   9  * @package WordPress
  10  * @subpackage Upgrader
  11  * @since 2.8.0
  12  */
  13
  14 require ABSPATH . 'wp-admin/includes/class-wp-upgrader-skins.php';
  15
  16 /**
  17  * WordPress Upgrader class for Upgrading/Installing a local set of files via the Filesystem Abstraction classes from a Zip file.
  18  *
  19  * @package WordPress
  20  * @subpackage Upgrader
  21  * @since 2.8.0
  22  */
  23 class WP_Upgrader {
  24         var $strings = array();
  25         var $skin = null;
  26         var $result = array();
  27
  28         function __construct($skin = null) {
  29                 if ( null == $skin )
  30                         $this->skin = new WP_Upgrader_Skin();
  31                 else
  32                         $this->skin = $skin;
  33         }
  34
  35         function init() {
  36                 $this->skin->set_upgrader($this);
  37                 $this->generic_strings();
  38         }
  39
  40         function generic_strings() {
  41                 $this->strings['bad_request'] = __('Invalid Data provided.');
  42                 $this->strings['fs_unavailable'] = __('Could not access filesystem.');
  43                 $this->strings['fs_error'] = __('Filesystem error.');
  44                 $this->strings['fs_no_root_dir'] = __('Unable to locate WordPress Root directory.');
  45                 $this->strings['fs_no_content_dir'] = __('Unable to locate WordPress Content directory (wp-content).');
  46                 $this->strings['fs_no_plugins_dir'] = __('Unable to locate WordPress Plugin directory.');
  47                 $this->strings['fs_no_themes_dir'] = __('Unable to locate WordPress Theme directory.');
  48                 /* translators: %s: directory name */
  49                 $this->strings['fs_no_folder'] = __('Unable to locate needed folder (%s).');
  50
  51                 $this->strings['download_failed'] = __('Download failed.');
  52                 $this->strings['installing_package'] = __('Installing the latest version&#8230;');
  53                 $this->strings['no_files'] = __('The package contains no files.');
  54                 $this->strings['folder_exists'] = __('Destination folder already exists.');
  55                 $this->strings['mkdir_failed'] = __('Could not create directory.');
  56                 $this->strings['incompatible_archive'] = __('The package could not be installed.');
  57
  58                 $this->strings['maintenance_start'] = __('Enabling Maintenance mode&#8230;');
  59                 $this->strings['maintenance_end'] = __('Disabling Maintenance mode&#8230;');
  60         }
  61
  62         function fs_connect( $directories = array() ) {
  63                 global $wp_filesystem;
  64
  65                 if ( false === ($credentials = $this->skin->request_filesystem_credentials()) )
  66                         return false;
  67
  68                 if ( ! WP_Filesystem($credentials) ) {
  69                         $error = true;
  70                         if ( is_object($wp_filesystem) && $wp_filesystem->errors->get_error_code() )
  71                                 $error = $wp_filesystem->errors;
  72                         $this->skin->request_filesystem_credentials($error); //Failed to connect, Error and request again
  73                         return false;
  74                 }
  75
  76                 if ( ! is_object($wp_filesystem) )
  77                         return new WP_Error('fs_unavailable', $this->strings['fs_unavailable'] );
  78
  79                 if ( is_wp_error($wp_filesystem->errors) && $wp_filesystem->errors->get_error_code() )
  80                         return new WP_Error('fs_error', $this->strings['fs_error'], $wp_filesystem->errors);
  81
  82                 foreach ( (array)$directories as $dir ) {
  83                         switch ( $dir ) {
  84                                 case ABSPATH:
  85                                         if ( ! $wp_filesystem->abspath() )
  86                                                 return new WP_Error('fs_no_root_dir', $this->strings['fs_no_root_dir']);
  87                                         break;
  88                                 case WP_CONTENT_DIR:
  89                                         if ( ! $wp_filesystem->wp_content_dir() )
  90                                                 return new WP_Error('fs_no_content_dir', $this->strings['fs_no_content_dir']);
  91                                         break;
  92                                 case WP_PLUGIN_DIR:
  93                                         if ( ! $wp_filesystem->wp_plugins_dir() )
  94                                                 return new WP_Error('fs_no_plugins_dir', $this->strings['fs_no_plugins_dir']);
  95                                         break;
  96                                 case get_theme_root():
  97                                         if ( ! $wp_filesystem->wp_themes_dir() )
  98                                                 return new WP_Error('fs_no_themes_dir', $this->strings['fs_no_themes_dir']);
  99                                         break;
 100                                 default:
 101                                         if ( ! $wp_filesystem->find_folder($dir) )
 102                                                 return new WP_Error( 'fs_no_folder', sprintf( $this->strings['fs_no_folder'], esc_html( basename( $dir ) ) ) );
 103                                         break;
 104                         }
 105                 }
 106                 return true;
 107         } //end fs_connect();
 108
 109         function download_package($package) {
 110
 111                 /**
 112                  * Filter whether to return the package.
 113                  *
 114                  * @since 3.7.0
 115                  *
 116                  * @param bool    $reply   Whether to bail without returning the package. Default is false.
 117                  * @param string  $package The package file name.
 118                  * @param object  $this    The WP_Upgrader instance.
 119                  */
 120                 $reply = apply_filters( 'upgrader_pre_download', false, $package, $this );
 121                 if ( false !== $reply )
 122                         return $reply;
 123
 124                 if ( ! preg_match('!^(http|https|ftp)://!i', $package) && file_exists($package) ) //Local file or remote?
 125                         return $package; //must be a local file..
 126
 127                 if ( empty($package) )
 128                         return new WP_Error('no_package', $this->strings['no_package']);
 129
 130                 $this->skin->feedback('downloading_package', $package);
 131
 132                 $download_file = download_url($package);
 133
 134                 if ( is_wp_error($download_file) )
 135                         return new WP_Error('download_failed', $this->strings['download_failed'], $download_file->get_error_message());
 136
 137                 return $download_file;
 138         }
 139
 140         function unpack_package($package, $delete_package = true) {
 141                 global $wp_filesystem;
 142
 143                 $this->skin->feedback('unpack_package');
 144
 145                 $upgrade_folder = $wp_filesystem->wp_content_dir() . 'upgrade/';
 146
 147                 //Clean up contents of upgrade directory beforehand.
 148                 $upgrade_files = $wp_filesystem->dirlist($upgrade_folder);
 149                 if ( !empty($upgrade_files) ) {
 150                         foreach ( $upgrade_files as $file )
 151                                 $wp_filesystem->delete($upgrade_folder . $file['name'], true);
 152                 }
 153
 154                 //We need a working directory
 155                 $working_dir = $upgrade_folder . basename($package, '.zip');
 156
 157                 // Clean up working directory
 158                 if ( $wp_filesystem->is_dir($working_dir) )
 159                         $wp_filesystem->delete($working_dir, true);
 160
 161                 // Unzip package to working directory
 162                 $result = unzip_file( $package, $working_dir );
 163
 164                 // Once extracted, delete the package if required.
 165                 if ( $delete_package )
 166                         unlink($package);
 167
 168                 if ( is_wp_error($result) ) {
 169                         $wp_filesystem->delete($working_dir, true);
 170                         if ( 'incompatible_archive' == $result->get_error_code() ) {
 171                                 return new WP_Error( 'incompatible_archive', $this->strings['incompatible_archive'], $result->get_error_data() );
 172                         }
 173                         return $result;
 174                 }
 175
 176                 return $working_dir;
 177         }
 178
 179         function install_package( $args = array() ) {
 180                 global $wp_filesystem, $wp_theme_directories;
 181
 182                 $defaults = array(
 183                         'source' => '', // Please always pass this
 184                         'destination' => '', // and this
 185                         'clear_destination' => false,
 186                         'clear_working' => false,
 187                         'abort_if_destination_exists' => true,
 188                         'hook_extra' => array()
 189                 );
 190
 191                 $args = wp_parse_args($args, $defaults);
 192                 extract($args);
 193
 194                 @set_time_limit( 300 );
 195
 196                 if ( empty($source) || empty($destination) )
 197                         return new WP_Error('bad_request', $this->strings['bad_request']);
 198
 199                 $this->skin->feedback('installing_package');
 200
 201                 $res = apply_filters('upgrader_pre_install', true, $hook_extra);
 202                 if ( is_wp_error($res) )
 203                         return $res;
 204
 205                 //Retain the Original source and destinations
 206                 $remote_source = $source;
 207                 $local_destination = $destination;
 208
 209                 $source_files = array_keys( $wp_filesystem->dirlist($remote_source) );
 210                 $remote_destination = $wp_filesystem->find_folder($local_destination);
 211
 212                 //Locate which directory to copy to the new folder, This is based on the actual folder holding the files.
 213                 if ( 1 == count($source_files) && $wp_filesystem->is_dir( trailingslashit($source) . $source_files[0] . '/') ) //Only one folder? Then we want its contents.
 214                         $source = trailingslashit($source) . trailingslashit($source_files[0]);
 215                 elseif ( count($source_files) == 0 )
 216                         return new WP_Error( 'incompatible_archive_empty', $this->strings['incompatible_archive'], $this->strings['no_files'] ); // There are no files?
 217                 else //It's only a single file, the upgrader will use the foldername of this file as the destination folder. foldername is based on zip filename.
 218                         $source = trailingslashit($source);
 219
 220                 //Hook ability to change the source file location..
 221                 $source = apply_filters('upgrader_source_selection', $source, $remote_source, $this);
 222                 if ( is_wp_error($source) )
 223                         return $source;
 224
 225                 //Has the source location changed? If so, we need a new source_files list.
 226                 if ( $source !== $remote_source )
 227                         $source_files = array_keys( $wp_filesystem->dirlist($source) );
 228
 229                 // Protection against deleting files in any important base directories.
 230                 // Theme_Upgrader & Plugin_Upgrader also trigger this, as they pass the destination directory (WP_PLUGIN_DIR / wp-content/themes)
 231                 // intending to copy the directory into the directory, whilst they pass the source as the actual files to copy.
 232                 $protected_directories = array( ABSPATH, WP_CONTENT_DIR, WP_PLUGIN_DIR, WP_CONTENT_DIR . '/themes' );
 233                 if ( is_array( $wp_theme_directories ) )
 234                         $protected_directories = array_merge( $protected_directories, $wp_theme_directories );
 235                 if ( in_array( $destination, $protected_directories ) ) {
 236                         $remote_destination = trailingslashit($remote_destination) . trailingslashit(basename($source));
 237                         $destination = trailingslashit($destination) . trailingslashit(basename($source));
 238                 }
 239
 240                 if ( $clear_destination ) {
 241                         //We're going to clear the destination if there's something there
 242                         $this->skin->feedback('remove_old');
 243                         $removed = true;
 244                         if ( $wp_filesystem->exists($remote_destination) )
 245                                 $removed = $wp_filesystem->delete($remote_destination, true);
 246                         $removed = apply_filters('upgrader_clear_destination', $removed, $local_destination, $remote_destination, $hook_extra);
 247
 248                         if ( is_wp_error($removed) )
 249                                 return $removed;
 250                         else if ( ! $removed )
 251                                 return new WP_Error('remove_old_failed', $this->strings['remove_old_failed']);
 252                 } elseif ( $abort_if_destination_exists && $wp_filesystem->exists($remote_destination) ) {
 253                         //If we're not clearing the destination folder and something exists there already, Bail.
 254                         //But first check to see if there are actually any files in the folder.
 255                         $_files = $wp_filesystem->dirlist($remote_destination);
 256                         if ( ! empty($_files) ) {
 257                                 $wp_filesystem->delete($remote_source, true); //Clear out the source files.
 258                                 return new WP_Error('folder_exists', $this->strings['folder_exists'], $remote_destination );
 259                         }
 260                 }
 261
 262                 //Create destination if needed
 263                 if ( !$wp_filesystem->exists($remote_destination) )
 264                         if ( !$wp_filesystem->mkdir($remote_destination, FS_CHMOD_DIR) )
 265                                 return new WP_Error( 'mkdir_failed_destination', $this->strings['mkdir_failed'], $remote_destination );
 266
 267                 // Copy new version of item into place.
 268                 $result = copy_dir($source, $remote_destination);
 269                 if ( is_wp_error($result) ) {
 270                         if ( $clear_working )
 271                                 $wp_filesystem->delete($remote_source, true);
 272                         return $result;
 273                 }
 274
 275                 //Clear the Working folder?
 276                 if ( $clear_working )
 277                         $wp_filesystem->delete($remote_source, true);
 278
 279                 $destination_name = basename( str_replace($local_destination, '', $destination) );
 280                 if ( '.' == $destination_name )
 281                         $destination_name = '';
 282
 283                 $this->result = compact('local_source', 'source', 'source_name', 'source_files', 'destination', 'destination_name', 'local_destination', 'remote_destination', 'clear_destination', 'delete_source_dir');
 284
 285                 $res = apply_filters('upgrader_post_install', true, $hook_extra, $this->result);
 286                 if ( is_wp_error($res) ) {
 287                         $this->result = $res;
 288                         return $res;
 289                 }
 290
 291                 //Bombard the calling function will all the info which we've just used.
 292                 return $this->result;
 293         }
 294
 295         function run($options) {
 296
 297                 $defaults = array(
 298                         'package' => '', // Please always pass this.
 299                         'destination' => '', // And this
 300                         'clear_destination' => false,
 301                         'abort_if_destination_exists' => true, // Abort if the Destination directory exists, Pass clear_destination as false please
 302                         'clear_working' => true,
 303                         'is_multi' => false,
 304                         'hook_extra' => array() // Pass any extra $hook_extra args here, this will be passed to any hooked filters.
 305                 );
 306
 307                 $options = wp_parse_args($options, $defaults);
 308                 extract($options);
 309
 310                 if ( ! $is_multi ) // call $this->header separately if running multiple times
 311                         $this->skin->header();
 312
 313                 // Connect to the Filesystem first.
 314                 $res = $this->fs_connect( array(WP_CONTENT_DIR, $destination) );
 315                 // Mainly for non-connected filesystem.
 316                 if ( ! $res ) {
 317                         if ( ! $is_multi )
 318                                 $this->skin->footer();
 319                         return false;
 320                 }
 321
 322                 $this->skin->before();
 323
 324                 if ( is_wp_error($res) ) {
 325                         $this->skin->error($res);
 326                         $this->skin->after();
 327                         if ( ! $is_multi )
 328                                 $this->skin->footer();
 329                         return $res;
 330                 }
 331
 332                 //Download the package (Note, This just returns the filename of the file if the package is a local file)
 333                 $download = $this->download_package( $package );
 334                 if ( is_wp_error($download) ) {
 335                         $this->skin->error($download);
 336                         $this->skin->after();
 337                         if ( ! $is_multi )
 338                                 $this->skin->footer();
 339                         return $download;
 340                 }
 341
 342                 $delete_package = ($download != $package); // Do not delete a "local" file
 343
 344                 //Unzips the file into a temporary directory
 345                 $working_dir = $this->unpack_package( $download, $delete_package );
 346                 if ( is_wp_error($working_dir) ) {
 347                         $this->skin->error($working_dir);
 348                         $this->skin->after();
 349                         if ( ! $is_multi )
 350                                 $this->skin->footer();
 351                         return $working_dir;
 352                 }
 353
 354                 //With the given options, this installs it to the destination directory.
 355                 $result = $this->install_package( array(
 356                         'source' => $working_dir,
 357                         'destination' => $destination,
 358                         'clear_destination' => $clear_destination,
 359                         'abort_if_destination_exists' => $abort_if_destination_exists,
 360                         'clear_working' => $clear_working,
 361                         'hook_extra' => $hook_extra
 362                 ) );
 363
 364                 $this->skin->set_result($result);
 365                 if ( is_wp_error($result) ) {
 366                         $this->skin->error($result);
 367                         $this->skin->feedback('process_failed');
 368                 } else {
 369                         //Install Succeeded
 370                         $this->skin->feedback('process_success');
 371                 }
 372
 373                 $this->skin->after();
 374
 375                 if ( ! $is_multi ) {
 376                         do_action( 'upgrader_process_complete', $this, $hook_extra );
 377                         $this->skin->footer();
 378                 }
 379
 380                 return $result;
 381         }
 382
 383         function maintenance_mode($enable = false) {
 384                 global $wp_filesystem;
 385                 $file = $wp_filesystem->abspath() . '.maintenance';
 386                 if ( $enable ) {
 387                         $this->skin->feedback('maintenance_start');
 388                         // Create maintenance file to signal that we are upgrading
 389                         $maintenance_string = '<?php $upgrading = ' . time() . '; ?>';
 390                         $wp_filesystem->delete($file);
 391                         $wp_filesystem->put_contents($file, $maintenance_string, FS_CHMOD_FILE);
 392                 } else if ( !$enable && $wp_filesystem->exists($file) ) {
 393                         $this->skin->feedback('maintenance_end');
 394                         $wp_filesystem->delete($file);
 395                 }
 396         }
 397
 398 }
 399
 400 /**
 401  * Plugin Upgrader class for WordPress Plugins, It is designed to upgrade/install plugins from a local zip, remote zip URL, or uploaded zip file.
 402  *
 403  * @package WordPress
 404  * @subpackage Upgrader
 405  * @since 2.8.0
 406  */
 407 class Plugin_Upgrader extends WP_Upgrader {
 408
 409         var $result;
 410         var $bulk = false;
 411
 412         function upgrade_strings() {
 413                 $this->strings['up_to_date'] = __('The plugin is at the latest version.');
 414                 $this->strings['no_package'] = __('Update package not available.');
 415                 $this->strings['downloading_package'] = __('Downloading update from <span class="code">%s</span>&#8230;');
 416                 $this->strings['unpack_package'] = __('Unpacking the update&#8230;');
 417                 $this->strings['remove_old'] = __('Removing the old version of the plugin&#8230;');
 418                 $this->strings['remove_old_failed'] = __('Could not remove the old plugin.');
 419                 $this->strings['process_failed'] = __('Plugin update failed.');
 420                 $this->strings['process_success'] = __('Plugin updated successfully.');
 421         }
 422
 423         function install_strings() {
 424                 $this->strings['no_package'] = __('Install package not available.');
 425                 $this->strings['downloading_package'] = __('Downloading install package from <span class="code">%s</span>&#8230;');
 426                 $this->strings['unpack_package'] = __('Unpacking the package&#8230;');
 427                 $this->strings['installing_package'] = __('Installing the plugin&#8230;');
 428                 $this->strings['no_files'] = __('The plugin contains no files.');
 429                 $this->strings['process_failed'] = __('Plugin install failed.');
 430                 $this->strings['process_success'] = __('Plugin installed successfully.');
 431         }
 432
 433         function install( $package, $args = array() ) {
 434
 435                 $defaults = array(
 436                         'clear_update_cache' => true,
 437                 );
 438                 $parsed_args = wp_parse_args( $args, $defaults );
 439
 440                 $this->init();
 441                 $this->install_strings();
 442
 443                 add_filter('upgrader_source_selection', array($this, 'check_package') );
 444
 445                 $this->run( array(
 446                         'package' => $package,
 447                         'destination' => WP_PLUGIN_DIR,
 448                         'clear_destination' => false, // Do not overwrite files.
 449                         'clear_working' => true,
 450                         'hook_extra' => array(
 451                                 'type' => 'plugin',
 452                                 'action' => 'install',
 453                         )
 454                 ) );
 455
 456                 remove_filter('upgrader_source_selection', array($this, 'check_package') );
 457
 458                 if ( ! $this->result || is_wp_error($this->result) )
 459                         return $this->result;
 460
 461                 // Force refresh of plugin update information
 462                 wp_clean_plugins_cache( $parsed_args['clear_update_cache'] );
 463
 464                 return true;
 465         }
 466
 467         function upgrade( $plugin, $args = array() ) {
 468
 469                 $defaults = array(
 470                         'clear_update_cache' => true,
 471                 );
 472                 $parsed_args = wp_parse_args( $args, $defaults );
 473
 474                 $this->init();
 475                 $this->upgrade_strings();
 476
 477                 $current = get_site_transient( 'update_plugins' );
 478                 if ( !isset( $current->response[ $plugin ] ) ) {
 479                         $this->skin->before();
 480                         $this->skin->set_result(false);
 481                         $this->skin->error('up_to_date');
 482                         $this->skin->after();
 483                         return false;
 484                 }
 485
 486                 // Get the URL to the zip file
 487                 $r = $current->response[ $plugin ];
 488
 489                 add_filter('upgrader_pre_install', array($this, 'deactivate_plugin_before_upgrade'), 10, 2);
 490                 add_filter('upgrader_clear_destination', array($this, 'delete_old_plugin'), 10, 4);
 491                 //'source_selection' => array($this, 'source_selection'), //there's a trac ticket to move up the directory for zip's which are made a bit differently, useful for non-.org plugins.
 492
 493                 $this->run( array(
 494                         'package' => $r->package,
 495                         'destination' => WP_PLUGIN_DIR,
 496                         'clear_destination' => true,
 497                         'clear_working' => true,
 498                         'hook_extra' => array(
 499                                 'plugin' => $plugin,
 500                                 'type' => 'plugin',
 501                                 'action' => 'update',
 502                         ),
 503                 ) );
 504
 505                 // Cleanup our hooks, in case something else does a upgrade on this connection.
 506                 remove_filter('upgrader_pre_install', array($this, 'deactivate_plugin_before_upgrade'));
 507                 remove_filter('upgrader_clear_destination', array($this, 'delete_old_plugin'));
 508
 509                 if ( ! $this->result || is_wp_error($this->result) )
 510                         return $this->result;
 511
 512                 // Force refresh of plugin update information
 513                 wp_clean_plugins_cache( $parsed_args['clear_update_cache'] );
 514
 515                 return true;
 516         }
 517
 518         function bulk_upgrade( $plugins, $args = array() ) {
 519
 520                 $defaults = array(
 521                         'clear_update_cache' => true,
 522                 );
 523                 $parsed_args = wp_parse_args( $args, $defaults );
 524
 525                 $this->init();
 526                 $this->bulk = true;
 527                 $this->upgrade_strings();
 528
 529                 $current = get_site_transient( 'update_plugins' );
 530
 531                 add_filter('upgrader_clear_destination', array($this, 'delete_old_plugin'), 10, 4);
 532
 533                 $this->skin->header();
 534
 535                 // Connect to the Filesystem first.
 536                 $res = $this->fs_connect( array(WP_CONTENT_DIR, WP_PLUGIN_DIR) );
 537                 if ( ! $res ) {
 538                         $this->skin->footer();
 539                         return false;
 540                 }
 541
 542                 $this->skin->bulk_header();
 543
 544                 // Only start maintenance mode if:
 545                 // - running Multisite and there are one or more plugins specified, OR
 546                 // - a plugin with an update available is currently active.
 547                 // @TODO: For multisite, maintenance mode should only kick in for individual sites if at all possible.
 548                 $maintenance = ( is_multisite() && ! empty( $plugins ) );
 549                 foreach ( $plugins as $plugin )
 550                         $maintenance = $maintenance || ( is_plugin_active( $plugin ) && isset( $current->response[ $plugin] ) );
 551                 if ( $maintenance )
 552                         $this->maintenance_mode(true);
 553
 554                 $results = array();
 555
 556                 $this->update_count = count($plugins);
 557                 $this->update_current = 0;
 558                 foreach ( $plugins as $plugin ) {
 559                         $this->update_current++;
 560                         $this->skin->plugin_info = get_plugin_data( WP_PLUGIN_DIR . '/' . $plugin, false, true);
 561
 562                         if ( !isset( $current->response[ $plugin ] ) ) {
 563                                 $this->skin->set_result(true);
 564                                 $this->skin->before();
 565                                 $this->skin->feedback('up_to_date');
 566                                 $this->skin->after();
 567                                 $results[$plugin] = true;
 568                                 continue;
 569                         }
 570
 571                         // Get the URL to the zip file
 572                         $r = $current->response[ $plugin ];
 573
 574                         $this->skin->plugin_active = is_plugin_active($plugin);
 575
 576                         $result = $this->run( array(
 577                                 'package' => $r->package,
 578                                 'destination' => WP_PLUGIN_DIR,
 579                                 'clear_destination' => true,
 580                                 'clear_working' => true,
 581                                 'is_multi' => true,
 582                                 'hook_extra' => array(
 583                                         'plugin' => $plugin
 584                                 )
 585                         ) );
 586
 587                         $results[$plugin] = $this->result;
 588
 589                         // Prevent credentials auth screen from displaying multiple times
 590                         if ( false === $result )
 591                                 break;
 592                 } //end foreach $plugins
 593
 594                 $this->maintenance_mode(false);
 595
 596                 do_action( 'upgrader_process_complete', $this, array(
 597                         'action' => 'update',
 598                         'type' => 'plugin',
 599                         'bulk' => true,
 600                         'plugins' => $plugins,
 601                 ) );
 602
 603                 $this->skin->bulk_footer();
 604
 605                 $this->skin->footer();
 606
 607                 // Cleanup our hooks, in case something else does a upgrade on this connection.
 608                 remove_filter('upgrader_clear_destination', array($this, 'delete_old_plugin'));
 609
 610                 // Force refresh of plugin update information
 611                 wp_clean_plugins_cache( $parsed_args['clear_update_cache'] );
 612
 613                 return $results;
 614         }
 615
 616         function check_package($source) {
 617                 global $wp_filesystem;
 618
 619                 if ( is_wp_error($source) )
 620                         return $source;
 621
 622                 $working_directory = str_replace( $wp_filesystem->wp_content_dir(), trailingslashit(WP_CONTENT_DIR), $source);
 623                 if ( ! is_dir($working_directory) ) // Sanity check, if the above fails, lets not prevent installation.
 624                         return $source;
 625
 626                 // Check the folder contains at least 1 valid plugin.
 627                 $plugins_found = false;
 628                 foreach ( glob( $working_directory . '*.php' ) as $file ) {
 629                         $info = get_plugin_data($file, false, false);
 630                         if ( !empty( $info['Name'] ) ) {
 631                                 $plugins_found = true;
 632                                 break;
 633                         }
 634                 }
 635
 636                 if ( ! $plugins_found )
 637                         return new WP_Error( 'incompatible_archive_no_plugins', $this->strings['incompatible_archive'], __( 'No valid plugins were found.' ) );
 638
 639                 return $source;
 640         }
 641
 642         //return plugin info.
 643         function plugin_info() {
 644                 if ( ! is_array($this->result) )
 645                         return false;
 646                 if ( empty($this->result['destination_name']) )
 647                         return false;
 648
 649                 $plugin = get_plugins('/' . $this->result['destination_name']); //Ensure to pass with leading slash
 650                 if ( empty($plugin) )
 651                         return false;
 652
 653                 $pluginfiles = array_keys($plugin); //Assume the requested plugin is the first in the list
 654
 655                 return $this->result['destination_name'] . '/' . $pluginfiles[0];
 656         }
 657
 658         //Hooked to pre_install
 659         function deactivate_plugin_before_upgrade($return, $plugin) {
 660
 661                 if ( is_wp_error($return) ) //Bypass.
 662                         return $return;
 663
 664                 // When in cron (background updates) don't deactivate the plugin, as we require a browser to reactivate it
 665                 if ( defined( 'DOING_CRON' ) && DOING_CRON )
 666                         return $return;
 667
 668                 $plugin = isset($plugin['plugin']) ? $plugin['plugin'] : '';
 669                 if ( empty($plugin) )
 670                         return new WP_Error('bad_request', $this->strings['bad_request']);
 671
 672                 if ( is_plugin_active($plugin) ) {
 673                         //Deactivate the plugin silently, Prevent deactivation hooks from running.
 674                         deactivate_plugins($plugin, true);
 675                 }
 676         }
 677
 678         //Hooked to upgrade_clear_destination
 679         function delete_old_plugin($removed, $local_destination, $remote_destination, $plugin) {
 680                 global $wp_filesystem;
 681
 682                 if ( is_wp_error($removed) )
 683                         return $removed; //Pass errors through.
 684
 685                 $plugin = isset($plugin['plugin']) ? $plugin['plugin'] : '';
 686                 if ( empty($plugin) )
 687                         return new WP_Error('bad_request', $this->strings['bad_request']);
 688
 689                 $plugins_dir = $wp_filesystem->wp_plugins_dir();
 690                 $this_plugin_dir = trailingslashit( dirname($plugins_dir . $plugin) );
 691
 692                 if ( ! $wp_filesystem->exists($this_plugin_dir) ) //If it's already vanished.
 693                         return $removed;
 694
 695                 // If plugin is in its own directory, recursively delete the directory.
 696                 if ( strpos($plugin, '/') && $this_plugin_dir != $plugins_dir ) //base check on if plugin includes directory separator AND that it's not the root plugin folder
 697                         $deleted = $wp_filesystem->delete($this_plugin_dir, true);
 698                 else
 699                         $deleted = $wp_filesystem->delete($plugins_dir . $plugin);
 700
 701                 if ( ! $deleted )
 702                         return new WP_Error('remove_old_failed', $this->strings['remove_old_failed']);
 703
 704                 return true;
 705         }
 706 }
 707
 708 /**
 709  * Theme Upgrader class for WordPress Themes, It is designed to upgrade/install themes from a local zip, remote zip URL, or uploaded zip file.
 710  *
 711  * @package WordPress
 712  * @subpackage Upgrader
 713  * @since 2.8.0
 714  */
 715 class Theme_Upgrader extends WP_Upgrader {
 716
 717         var $result;
 718         var $bulk = false;
 719
 720         function upgrade_strings() {
 721                 $this->strings['up_to_date'] = __('The theme is at the latest version.');
 722                 $this->strings['no_package'] = __('Update package not available.');
 723                 $this->strings['downloading_package'] = __('Downloading update from <span class="code">%s</span>&#8230;');
 724                 $this->strings['unpack_package'] = __('Unpacking the update&#8230;');
 725                 $this->strings['remove_old'] = __('Removing the old version of the theme&#8230;');
 726                 $this->strings['remove_old_failed'] = __('Could not remove the old theme.');
 727                 $this->strings['process_failed'] = __('Theme update failed.');
 728                 $this->strings['process_success'] = __('Theme updated successfully.');
 729         }
 730
 731         function install_strings() {
 732                 $this->strings['no_package'] = __('Install package not available.');
 733                 $this->strings['downloading_package'] = __('Downloading install package from <span class="code">%s</span>&#8230;');
 734                 $this->strings['unpack_package'] = __('Unpacking the package&#8230;');
 735                 $this->strings['installing_package'] = __('Installing the theme&#8230;');
 736                 $this->strings['no_files'] = __('The theme contains no files.');
 737                 $this->strings['process_failed'] = __('Theme install failed.');
 738                 $this->strings['process_success'] = __('Theme installed successfully.');
 739                 /* translators: 1: theme name, 2: version */
 740                 $this->strings['process_success_specific'] = __('Successfully installed the theme <strong>%1$s %2$s</strong>.');
 741                 $this->strings['parent_theme_search'] = __('This theme requires a parent theme. Checking if it is installed&#8230;');
 742                 /* translators: 1: theme name, 2: version */
 743                 $this->strings['parent_theme_prepare_install'] = __('Preparing to install <strong>%1$s %2$s</strong>&#8230;');
 744                 /* translators: 1: theme name, 2: version */
 745                 $this->strings['parent_theme_currently_installed'] = __('The parent theme, <strong>%1$s %2$s</strong>, is currently installed.');
 746                 /* translators: 1: theme name, 2: version */
 747                 $this->strings['parent_theme_install_success'] = __('Successfully installed the parent theme, <strong>%1$s %2$s</strong>.');
 748                 $this->strings['parent_theme_not_found'] = __('<strong>The parent theme could not be found.</strong> You will need to install the parent theme, <strong>%s</strong>, before you can use this child theme.');
 749         }
 750
 751         function check_parent_theme_filter($install_result, $hook_extra, $child_result) {
 752                 // Check to see if we need to install a parent theme
 753                 $theme_info = $this->theme_info();
 754
 755                 if ( ! $theme_info->parent() )
 756                         return $install_result;
 757
 758                 $this->skin->feedback( 'parent_theme_search' );
 759
 760                 if ( ! $theme_info->parent()->errors() ) {
 761                         $this->skin->feedback( 'parent_theme_currently_installed', $theme_info->parent()->display('Name'), $theme_info->parent()->display('Version') );
 762                         // We already have the theme, fall through.
 763                         return $install_result;
 764                 }
 765
 766                 // We don't have the parent theme, lets install it
 767                 $api = themes_api('theme_information', array('slug' => $theme_info->get('Template'), 'fields' => array('sections' => false, 'tags' => false) ) ); //Save on a bit of bandwidth.
 768
 769                 if ( ! $api || is_wp_error($api) ) {
 770                         $this->skin->feedback( 'parent_theme_not_found', $theme_info->get('Template') );
 771                         // Don't show activate or preview actions after install
 772                         add_filter('install_theme_complete_actions', array($this, 'hide_activate_preview_actions') );
 773                         return $install_result;
 774                 }
 775
 776                 // Backup required data we're going to override:
 777                 $child_api = $this->skin->api;
 778                 $child_success_message = $this->strings['process_success'];
 779
 780                 // Override them
 781                 $this->skin->api = $api;
 782                 $this->strings['process_success_specific'] = $this->strings['parent_theme_install_success'];//, $api->name, $api->version);
 783
 784                 $this->skin->feedback('parent_theme_prepare_install', $api->name, $api->version);
 785
 786                 add_filter('install_theme_complete_actions', '__return_false', 999); // Don't show any actions after installing the theme.
 787
 788                 // Install the parent theme
 789                 $parent_result = $this->run( array(
 790                         'package' => $api->download_link,
 791                         'destination' => get_theme_root(),
 792                         'clear_destination' => false, //Do not overwrite files.
 793                         'clear_working' => true
 794                 ) );
 795
 796                 if ( is_wp_error($parent_result) )
 797                         add_filter('install_theme_complete_actions', array($this, 'hide_activate_preview_actions') );
 798
 799                 // Start cleaning up after the parents installation
 800                 remove_filter('install_theme_complete_actions', '__return_false', 999);
 801
 802                 // Reset child's result and data
 803                 $this->result = $child_result;
 804                 $this->skin->api = $child_api;
 805                 $this->strings['process_success'] = $child_success_message;
 806
 807                 return $install_result;
 808         }
 809
 810         function hide_activate_preview_actions($actions) {
 811                 unset($actions['activate'], $actions['preview']);
 812                 return $actions;
 813         }
 814
 815         function install( $package, $args = array() ) {
 816
 817                 $defaults = array(
 818                         'clear_update_cache' => true,
 819                 );
 820                 $parsed_args = wp_parse_args( $args, $defaults );
 821
 822                 $this->init();
 823                 $this->install_strings();
 824
 825                 add_filter('upgrader_source_selection', array($this, 'check_package') );
 826                 add_filter('upgrader_post_install', array($this, 'check_parent_theme_filter'), 10, 3);
 827
 828                 $this->run( array(
 829                         'package' => $package,
 830                         'destination' => get_theme_root(),
 831                         'clear_destination' => false, //Do not overwrite files.
 832                         'clear_working' => true,
 833                         'hook_extra' => array(
 834                                 'type' => 'theme',
 835                                 'action' => 'install',
 836                         ),
 837                 ) );
 838
 839                 remove_filter('upgrader_source_selection', array($this, 'check_package') );
 840                 remove_filter('upgrader_post_install', array($this, 'check_parent_theme_filter'));
 841
 842                 if ( ! $this->result || is_wp_error($this->result) )
 843                         return $this->result;
 844
 845                 // Refresh the Theme Update information
 846                 wp_clean_themes_cache( $parsed_args['clear_update_cache'] );
 847
 848                 return true;
 849         }
 850
 851         function upgrade( $theme, $args = array() ) {
 852
 853                 $defaults = array(
 854                         'clear_update_cache' => true,
 855                 );
 856                 $parsed_args = wp_parse_args( $args, $defaults );
 857
 858                 $this->init();
 859                 $this->upgrade_strings();
 860
 861                 // Is an update available?
 862                 $current = get_site_transient( 'update_themes' );
 863                 if ( !isset( $current->response[ $theme ] ) ) {
 864                         $this->skin->before();
 865                         $this->skin->set_result(false);
 866                         $this->skin->error('up_to_date');
 867                         $this->skin->after();
 868                         return false;
 869                 }
 870
 871                 $r = $current->response[ $theme ];
 872
 873                 add_filter('upgrader_pre_install', array($this, 'current_before'), 10, 2);
 874                 add_filter('upgrader_post_install', array($this, 'current_after'), 10, 2);
 875                 add_filter('upgrader_clear_destination', array($this, 'delete_old_theme'), 10, 4);
 876
 877                 $this->run( array(
 878                         'package' => $r['package'],
 879                         'destination' => get_theme_root( $theme ),
 880                         'clear_destination' => true,
 881                         'clear_working' => true,
 882                         'hook_extra' => array(
 883                                 'theme' => $theme,
 884                                 'type' => 'theme',
 885                                 'action' => 'update',
 886                         ),
 887                 ) );
 888
 889                 remove_filter('upgrader_pre_install', array($this, 'current_before'));
 890                 remove_filter('upgrader_post_install', array($this, 'current_after'));
 891                 remove_filter('upgrader_clear_destination', array($this, 'delete_old_theme'));
 892
 893                 if ( ! $this->result || is_wp_error($this->result) )
 894                         return $this->result;
 895
 896                 wp_clean_themes_cache( $parsed_args['clear_update_cache'] );
 897
 898                 return true;
 899         }
 900
 901         function bulk_upgrade( $themes, $args = array() ) {
 902
 903                 $defaults = array(
 904                         'clear_update_cache' => true,
 905                 );
 906                 $parsed_args = wp_parse_args( $args, $defaults );
 907
 908                 $this->init();
 909                 $this->bulk = true;
 910                 $this->upgrade_strings();
 911
 912                 $current = get_site_transient( 'update_themes' );
 913
 914                 add_filter('upgrader_pre_install', array($this, 'current_before'), 10, 2);
 915                 add_filter('upgrader_post_install', array($this, 'current_after'), 10, 2);
 916                 add_filter('upgrader_clear_destination', array($this, 'delete_old_theme'), 10, 4);
 917
 918                 $this->skin->header();
 919
 920                 // Connect to the Filesystem first.
 921                 $res = $this->fs_connect( array(WP_CONTENT_DIR) );
 922                 if ( ! $res ) {
 923                         $this->skin->footer();
 924                         return false;
 925                 }
 926
 927                 $this->skin->bulk_header();
 928
 929                 // Only start maintenance mode if:
 930                 // - running Multisite and there are one or more themes specified, OR
 931                 // - a theme with an update available is currently in use.
 932                 // @TODO: For multisite, maintenance mode should only kick in for individual sites if at all possible.
 933                 $maintenance = ( is_multisite() && ! empty( $themes ) );
 934                 foreach ( $themes as $theme )
 935                         $maintenance = $maintenance || $theme == get_stylesheet() || $theme == get_template();
 936                 if ( $maintenance )
 937                         $this->maintenance_mode(true);
 938
 939                 $results = array();
 940
 941                 $this->update_count = count($themes);
 942                 $this->update_current = 0;
 943                 foreach ( $themes as $theme ) {
 944                         $this->update_current++;
 945
 946                         $this->skin->theme_info = $this->theme_info($theme);
 947
 948                         if ( !isset( $current->response[ $theme ] ) ) {
 949                                 $this->skin->set_result(true);
 950                                 $this->skin->before();
 951                                 $this->skin->feedback('up_to_date');
 952                                 $this->skin->after();
 953                                 $results[$theme] = true;
 954                                 continue;
 955                         }
 956
 957                         // Get the URL to the zip file
 958                         $r = $current->response[ $theme ];
 959
 960                         $result = $this->run( array(
 961                                 'package' => $r['package'],
 962                                 'destination' => get_theme_root( $theme ),
 963                                 'clear_destination' => true,
 964                                 'clear_working' => true,
 965                                 'hook_extra' => array(
 966                                         'theme' => $theme
 967                                 ),
 968                         ) );
 969
 970                         $results[$theme] = $this->result;
 971
 972                         // Prevent credentials auth screen from displaying multiple times
 973                         if ( false === $result )
 974                                 break;
 975                 } //end foreach $plugins
 976
 977                 $this->maintenance_mode(false);
 978
 979                 do_action( 'upgrader_process_complete', $this, array(
 980                         'action' => 'update',
 981                         'type' => 'theme',
 982                         'bulk' => true,
 983                         'themes' => $themes,
 984                 ) );
 985
 986                 $this->skin->bulk_footer();
 987
 988                 $this->skin->footer();
 989
 990                 // Cleanup our hooks, in case something else does a upgrade on this connection.
 991                 remove_filter('upgrader_pre_install', array($this, 'current_before'));
 992                 remove_filter('upgrader_post_install', array($this, 'current_after'));
 993                 remove_filter('upgrader_clear_destination', array($this, 'delete_old_theme'));
 994
 995                 // Refresh the Theme Update information
 996                 wp_clean_themes_cache( $parsed_args['clear_update_cache'] );
 997
 998                 return $results;
 999         }
1000
1001         function check_package($source) {
1002                 global $wp_filesystem;
1003
1004                 if ( is_wp_error($source) )
1005                         return $source;
1006
1007                 // Check the folder contains a valid theme
1008                 $working_directory = str_replace( $wp_filesystem->wp_content_dir(), trailingslashit(WP_CONTENT_DIR), $source);
1009                 if ( ! is_dir($working_directory) ) // Sanity check, if the above fails, lets not prevent installation.
1010                         return $source;
1011
1012                 // A proper archive should have a style.css file in the single subdirectory
1013                 if ( ! file_exists( $working_directory . 'style.css' ) )
1014                         return new WP_Error( 'incompatible_archive_theme_no_style', $this->strings['incompatible_archive'], __( 'The theme is missing the <code>style.css</code> stylesheet.' ) );
1015
1016                 $info = get_file_data( $working_directory . 'style.css', array( 'Name' => 'Theme Name', 'Template' => 'Template' ) );
1017
1018                 if ( empty( $info['Name'] ) )
1019                         return new WP_Error( 'incompatible_archive_theme_no_name', $this->strings['incompatible_archive'], __( "The <code>style.css</code> stylesheet doesn't contain a valid theme header." ) );
1020
1021                 // If it's not a child theme, it must have at least an index.php to be legit.
1022                 if ( empty( $info['Template'] ) && ! file_exists( $working_directory . 'index.php' ) )
1023                         return new WP_Error( 'incompatible_archive_theme_no_index', $this->strings['incompatible_archive'], __( 'The theme is missing the <code>index.php</code> file.' ) );
1024
1025                 return $source;
1026         }
1027
1028         function current_before($return, $theme) {
1029
1030                 if ( is_wp_error($return) )
1031                         return $return;
1032
1033                 $theme = isset($theme['theme']) ? $theme['theme'] : '';
1034
1035                 if ( $theme != get_stylesheet() ) //If not current
1036                         return $return;
1037                 //Change to maintenance mode now.
1038                 if ( ! $this->bulk )
1039                         $this->maintenance_mode(true);
1040
1041                 return $return;
1042         }
1043
1044         function current_after($return, $theme) {
1045                 if ( is_wp_error($return) )
1046                         return $return;
1047
1048                 $theme = isset($theme['theme']) ? $theme['theme'] : '';
1049
1050                 if ( $theme != get_stylesheet() ) // If not current
1051                         return $return;
1052
1053                 // Ensure stylesheet name hasn't changed after the upgrade:
1054                 if ( $theme == get_stylesheet() && $theme != $this->result['destination_name'] ) {
1055                         wp_clean_themes_cache();
1056                         $stylesheet = $this->result['destination_name'];
1057                         switch_theme( $stylesheet );
1058                 }
1059
1060                 //Time to remove maintenance mode
1061                 if ( ! $this->bulk )
1062                         $this->maintenance_mode(false);
1063                 return $return;
1064         }
1065
1066         function delete_old_theme( $removed, $local_destination, $remote_destination, $theme ) {
1067                 global $wp_filesystem;
1068
1069                 if ( is_wp_error( $removed ) )
1070                         return $removed; // Pass errors through.
1071
1072                 if ( ! isset( $theme['theme'] ) )
1073                         return $removed;
1074
1075                 $theme = $theme['theme'];
1076                 $themes_dir = trailingslashit( $wp_filesystem->wp_themes_dir( $theme ) );
1077                 if ( $wp_filesystem->exists( $themes_dir . $theme ) ) {
1078                         if ( ! $wp_filesystem->delete( $themes_dir . $theme, true ) )
1079                                 return false;
1080                 }
1081
1082                 return true;
1083         }
1084
1085         function theme_info($theme = null) {
1086
1087                 if ( empty($theme) ) {
1088                         if ( !empty($this->result['destination_name']) )
1089                                 $theme = $this->result['destination_name'];
1090                         else
1091                                 return false;
1092                 }
1093                 return wp_get_theme( $theme );
1094         }
1095
1096 }
1097
1098 add_action( 'upgrader_process_complete', array( 'Language_Pack_Upgrader', 'async_upgrade' ), 20 );
1099
1100 /**
1101  * Language pack upgrader, for updating translations of plugins, themes, and core.
1102  *
1103  * @package WordPress
1104  * @subpackage Upgrader
1105  * @since 3.7.0
1106  */
1107 class Language_Pack_Upgrader extends WP_Upgrader {
1108
1109         var $result;
1110         var $bulk = true;
1111
1112         static function async_upgrade( $upgrader = false ) {
1113                 // Avoid recursion.
1114                 if ( $upgrader && $upgrader instanceof Language_Pack_Upgrader )
1115                         return;
1116
1117                 // Nothing to do?
1118                 $language_updates = wp_get_translation_updates();
1119                 if ( ! $language_updates )
1120                         return;
1121
1122                 $skin = new Language_Pack_Upgrader_Skin( array(
1123                         'skip_header_footer' => true,
1124                 ) );
1125
1126                 $lp_upgrader = new Language_Pack_Upgrader( $skin );
1127                 $lp_upgrader->upgrade();
1128         }
1129
1130         function upgrade_strings() {
1131                 $this->strings['starting_upgrade'] = __( 'Some of your translations need updating. Sit tight for a few more seconds while we update them as well.' );
1132                 $this->strings['up_to_date'] = __( 'The translation is up to date.' ); // We need to silently skip this case
1133                 $this->strings['no_package'] = __( 'Update package not available.' );
1134                 $this->strings['downloading_package'] = __( 'Downloading translation from <span class="code">%s</span>&#8230;' );
1135                 $this->strings['unpack_package'] = __( 'Unpacking the update&#8230;' );
1136                 $this->strings['process_failed'] = __( 'Translation update failed.' );
1137                 $this->strings['process_success'] = __( 'Translation updated successfully.' );
1138         }
1139
1140         function upgrade( $update = false, $args = array() ) {
1141                 if ( $update )
1142                         $update = array( $update );
1143                 $results = $this->bulk_upgrade( $update, $args );
1144                 return $results[0];
1145         }
1146
1147         function bulk_upgrade( $language_updates = array(), $args = array() ) {
1148                 global $wp_filesystem;
1149
1150                 $defaults = array(
1151                         'clear_update_cache' => true,
1152                 );
1153                 $parsed_args = wp_parse_args( $args, $defaults );
1154
1155                 $this->init();
1156                 $this->upgrade_strings();
1157
1158                 if ( ! $language_updates )
1159                         $language_updates = wp_get_translation_updates();
1160
1161                 if ( empty( $language_updates ) ) {
1162                         $this->skin->header();
1163                         $this->skin->before();
1164                         $this->skin->set_result( true );
1165                         $this->skin->feedback( 'up_to_date' );
1166                         $this->skin->after();
1167                         $this->skin->bulk_footer();
1168                         $this->skin->footer();
1169                         return true;
1170                 }
1171
1172                 if ( 'upgrader_process_complete' == current_filter() )
1173                         $this->skin->feedback( 'starting_upgrade' );
1174
1175                 add_filter( 'upgrader_source_selection', array( &$this, 'check_package' ), 10, 3 );
1176
1177                 $this->skin->header();
1178
1179                 // Connect to the Filesystem first.
1180                 $res = $this->fs_connect( array( WP_CONTENT_DIR, WP_LANG_DIR ) );
1181                 if ( ! $res ) {
1182                         $this->skin->footer();
1183                         return false;
1184                 }
1185
1186                 $results = array();
1187
1188                 $this->update_count = count( $language_updates );
1189                 $this->update_current = 0;
1190
1191                 // The filesystem's mkdir() is not recursive. Make sure WP_LANG_DIR exists,
1192                 // as we then may need to create a /plugins or /themes directory inside of it.
1193                 $remote_destination = $wp_filesystem->find_folder( WP_LANG_DIR );
1194                 if ( ! $wp_filesystem->exists( $remote_destination ) )
1195                         if ( ! $wp_filesystem->mkdir( $remote_destination, FS_CHMOD_DIR ) )
1196                                 return new WP_Error( 'mkdir_failed_lang_dir', $this->strings['mkdir_failed'], $remote_destination );
1197
1198                 foreach ( $language_updates as $language_update ) {
1199
1200                         $this->skin->language_update = $language_update;
1201
1202                         $destination = WP_LANG_DIR;
1203                         if ( 'plugin' == $language_update->type )
1204                                 $destination .= '/plugins';
1205                         elseif ( 'theme' == $language_update->type )
1206                                 $destination .= '/themes';
1207
1208                         $this->update_current++;
1209
1210                         $options = array(
1211                                 'package' => $language_update->package,
1212                                 'destination' => $destination,
1213                                 'clear_destination' => false,
1214                                 'abort_if_destination_exists' => false, // We expect the destination to exist.
1215                                 'clear_working' => true,
1216                                 'is_multi' => true,
1217                                 'hook_extra' => array(
1218                                         'language_update_type' => $language_update->type,
1219                                         'language_update' => $language_update,
1220                                 )
1221                         );
1222
1223                         $result = $this->run( $options );
1224
1225                         $results[] = $this->result;
1226
1227                         // Prevent credentials auth screen from displaying multiple times.
1228                         if ( false === $result )
1229                                 break;
1230                 }
1231
1232                 $this->skin->bulk_footer();
1233
1234                 $this->skin->footer();
1235
1236                 // Clean up our hooks, in case something else does an upgrade on this connection.
1237                 remove_filter( 'upgrader_source_selection', array( &$this, 'check_package' ), 10, 2 );
1238
1239                 if ( $parsed_args['clear_update_cache'] ) {
1240                         wp_clean_themes_cache( true );
1241                         wp_clean_plugins_cache( true );
1242                         delete_site_transient( 'update_core' );
1243                 }
1244
1245                 return $results;
1246         }
1247
1248         function check_package( $source, $remote_source ) {
1249                 global $wp_filesystem;
1250
1251                 if ( is_wp_error( $source ) )
1252                         return $source;
1253
1254                 // Check that the folder contains a valid language.
1255                 $files = $wp_filesystem->dirlist( $remote_source );
1256
1257                 // Check to see if a .po and .mo exist in the folder.
1258                 $po = $mo = false;
1259                 foreach ( (array) $files as $file => $filedata ) {
1260                         if ( '.po' == substr( $file, -3 ) )
1261                                 $po = true;
1262                         elseif ( '.mo' == substr( $file, -3 ) )
1263                                 $mo = true;
1264                 }
1265
1266                 if ( ! $mo || ! $po )
1267                         return new WP_Error( 'incompatible_archive_pomo', $this->strings['incompatible_archive'],
1268                                 __( 'The language pack is missing either the <code>.po</code> or <code>.mo</code> files.' ) );
1269
1270                 return $source;
1271         }
1272
1273         function get_name_for_update( $update ) {
1274                 switch ( $update->type ) {
1275                         case 'core':
1276                                 return 'WordPress'; // Not translated
1277                                 break;
1278                         case 'theme':
1279                                 $theme = wp_get_theme( $update->slug );
1280                                 if ( $theme->exists() )
1281                                         return $theme->Get( 'Name' );
1282                                 break;
1283                         case 'plugin':
1284                                 $plugin_data = get_plugins( '/' . $update->slug );
1285                                 $plugin_data = array_shift( $plugin_data );
1286                                 if ( $plugin_data )
1287                                         return $plugin_data['Name'];
1288                                 break;
1289                 }
1290                 return '';
1291         }
1292
1293 }
1294
1295 /**
1296  * Core Upgrader class for WordPress. It allows for WordPress to upgrade itself in combination with the wp-admin/includes/update-core.php file
1297  *
1298  * @package WordPress
1299  * @subpackage Upgrader
1300  * @since 2.8.0
1301  */
1302 class Core_Upgrader extends WP_Upgrader {
1303
1304         function upgrade_strings() {
1305                 $this->strings['up_to_date'] = __('WordPress is at the latest version.');
1306                 $this->strings['no_package'] = __('Update package not available.');
1307                 $this->strings['downloading_package'] = __('Downloading update from <span class="code">%s</span>&#8230;');
1308                 $this->strings['unpack_package'] = __('Unpacking the update&#8230;');
1309                 $this->strings['copy_failed'] = __('Could not copy files.');
1310                 $this->strings['copy_failed_space'] = __('Could not copy files. You may have run out of disk space.' );
1311                 $this->strings['start_rollback'] = __( 'Attempting to roll back to previous version.' );
1312                 $this->strings['rollback_was_required'] = __( 'Due to an error during updating, WordPress has rolled back to your previous version.' );
1313         }
1314
1315         function upgrade( $current, $args = array() ) {
1316                 global $wp_filesystem;
1317
1318                 include ABSPATH . WPINC . '/version.php'; // $wp_version;
1319
1320                 $start_time = time();
1321
1322                 $defaults = array(
1323                         'pre_check_md5'    => true,
1324                         'attempt_rollback' => false,
1325                         'do_rollback'      => false,
1326                 );
1327                 $parsed_args = wp_parse_args( $args, $defaults );
1328
1329                 $this->init();
1330                 $this->upgrade_strings();
1331
1332                 // Is an update available?
1333                 if ( !isset( $current->response ) || $current->response == 'latest' )
1334                         return new WP_Error('up_to_date', $this->strings['up_to_date']);
1335
1336                 $res = $this->fs_connect( array(ABSPATH, WP_CONTENT_DIR) );
1337                 if ( ! $res || is_wp_error( $res ) ) {
1338                         return $res;
1339                 }
1340
1341                 $wp_dir = trailingslashit($wp_filesystem->abspath());
1342
1343                 $partial = true;
1344                 if ( $parsed_args['do_rollback'] )
1345                         $partial = false;
1346                 elseif ( $parsed_args['pre_check_md5'] && ! $this->check_files() )
1347                         $partial = false;
1348
1349                 // If partial update is returned from the API, use that, unless we're doing a reinstall.
1350                 // If we cross the new_bundled version number, then use the new_bundled zip.
1351                 // Don't though if the constant is set to skip bundled items.
1352                 // If the API returns a no_content zip, go with it. Finally, default to the full zip.
1353                 if ( $parsed_args['do_rollback'] && $current->packages->rollback )
1354                         $to_download = 'rollback';
1355                 elseif ( $current->packages->partial && 'reinstall' != $current->response && $wp_version == $current->partial_version && $partial )
1356                         $to_download = 'partial';
1357                 elseif ( $current->packages->new_bundled && version_compare( $wp_version, $current->new_bundled, '<' )
1358                         && ( ! defined( 'CORE_UPGRADE_SKIP_NEW_BUNDLED' ) || ! CORE_UPGRADE_SKIP_NEW_BUNDLED ) )
1359                         $to_download = 'new_bundled';
1360                 elseif ( $current->packages->no_content )
1361                         $to_download = 'no_content';
1362                 else
1363                         $to_download = 'full';
1364
1365                 $download = $this->download_package( $current->packages->$to_download );
1366                 if ( is_wp_error($download) )
1367                         return $download;
1368
1369                 $working_dir = $this->unpack_package( $download );
1370                 if ( is_wp_error($working_dir) )
1371                         return $working_dir;
1372
1373                 // Copy update-core.php from the new version into place.
1374                 if ( !$wp_filesystem->copy($working_dir . '/wordpress/wp-admin/includes/update-core.php', $wp_dir . 'wp-admin/includes/update-core.php', true) ) {
1375                         $wp_filesystem->delete($working_dir, true);
1376                         return new WP_Error( 'copy_failed_for_update_core_file', __( 'The update cannot be installed because we will be unable to copy some files. This is usually due to inconsistent file permissions.' ), 'wp-admin/includes/update-core.php' );
1377                 }
1378                 $wp_filesystem->chmod($wp_dir . 'wp-admin/includes/update-core.php', FS_CHMOD_FILE);
1379
1380                 require_once( ABSPATH . 'wp-admin/includes/update-core.php' );
1381
1382                 if ( ! function_exists( 'update_core' ) )
1383                         return new WP_Error( 'copy_failed_space', $this->strings['copy_failed_space'] );
1384
1385                 $result = update_core( $working_dir, $wp_dir );
1386
1387                 // In the event of an issue, we may be able to roll back.
1388                 if ( $parsed_args['attempt_rollback'] && $current->packages->rollback && ! $parsed_args['do_rollback'] ) {
1389                         $try_rollback = false;
1390                         if ( is_wp_error( $result ) ) {
1391                                 $error_code = $result->get_error_code();
1392                                 // Not all errors are equal. These codes are critical: copy_failed__copy_dir,
1393                                 // mkdir_failed__copy_dir, copy_failed__copy_dir_retry, and disk_full.
1394                                 // do_rollback allows for update_core() to trigger a rollback if needed.
1395                                 if ( false !== strpos( $error_code, 'do_rollback' ) )
1396                                         $try_rollback = true;
1397                                 elseif ( false !== strpos( $error_code, '__copy_dir' ) )
1398                                         $try_rollback = true;
1399                                 elseif ( 'disk_full' === $error_code )
1400                                         $try_rollback = true;
1401                         }
1402
1403                         if ( $try_rollback ) {
1404                                 apply_filters( 'update_feedback', $result );
1405                                 apply_filters( 'update_feedback', $this->strings['start_rollback'] );
1406
1407                                 $rollback_result = $this->upgrade( $current, array_merge( $parsed_args, array( 'do_rollback' => true ) ) );
1408
1409                                 $original_result = $result;
1410                                 $result = new WP_Error( 'rollback_was_required', $this->strings['rollback_was_required'], (object) array( 'update' => $original_result, 'rollback' => $rollback_result ) );
1411                         }
1412                 }
1413
1414                 do_action( 'upgrader_process_complete', $this, array( 'action' => 'update', 'type' => 'core' ) );
1415
1416                 // Clear the current updates
1417                 delete_site_transient( 'update_core' );
1418
1419                 if ( ! $parsed_args['do_rollback'] ) {
1420                         $stats = array(
1421                                 'update_type'      => $current->response,
1422                                 'success'          => true,
1423                                 'fs_method'        => $wp_filesystem->method,
1424                                 'fs_method_forced' => defined( 'FS_METHOD' ) || has_filter( 'filesystem_method' ),
1425                                 'time_taken'       => time() - $start_time,
1426                                 'reported'         => $wp_version,
1427                                 'attempted'        => $current->version,
1428                         );
1429
1430                         if ( is_wp_error( $result ) ) {
1431                                 $stats['success'] = false;
1432                                 // Did a rollback occur?
1433                                 if ( ! empty( $try_rollback ) ) {
1434                                         $stats['error_code'] = $original_result->get_error_code();
1435                                         $stats['error_data'] = $original_result->get_error_data();
1436                                         // Was the rollback successful? If not, collect its error too.
1437                                         $stats['rollback'] = ! is_wp_error( $rollback_result );
1438                                         if ( is_wp_error( $rollback_result ) ) {
1439                                                 $stats['rollback_code'] = $rollback_result->get_error_code();
1440                                                 $stats['rollback_data'] = $rollback_result->get_error_data();
1441                                         }
1442                                 } else {
1443                                         $stats['error_code'] = $result->get_error_code();
1444                                         $stats['error_data'] = $result->get_error_data();
1445                                 }
1446                         }
1447
1448                         wp_version_check( $stats );
1449                 }
1450
1451                 return $result;
1452         }
1453
1454         // Determines if this WordPress Core version should update to $offered_ver or not
1455         static function should_update_to_version( $offered_ver /* x.y.z */ ) {
1456                 include ABSPATH . WPINC . '/version.php'; // $wp_version; // x.y.z
1457
1458                 $current_branch = implode( '.', array_slice( preg_split( '/[.-]/', $wp_version  ), 0, 2 ) ); // x.y
1459                 $new_branch     = implode( '.', array_slice( preg_split( '/[.-]/', $offered_ver ), 0, 2 ) ); // x.y
1460                 $current_is_development_version = (bool) strpos( $wp_version, '-' );
1461
1462                 // Defaults:
1463                 $upgrade_dev   = true;
1464                 $upgrade_minor = true;
1465                 $upgrade_major = false;
1466
1467                 // WP_AUTO_UPDATE_CORE = true (all), 'minor', false.
1468                 if ( defined( 'WP_AUTO_UPDATE_CORE' ) ) {
1469                         if ( false === WP_AUTO_UPDATE_CORE ) {
1470                                 // Defaults to turned off, unless a filter allows it
1471                                 $upgrade_dev = $upgrade_minor = $upgrade_major = false;
1472                         } elseif ( true === WP_AUTO_UPDATE_CORE ) {
1473                                 // ALL updates for core
1474                                 $upgrade_dev = $upgrade_minor = $upgrade_major = true;
1475                         } elseif ( 'minor' === WP_AUTO_UPDATE_CORE ) {
1476                                 // Only minor updates for core
1477                                 $upgrade_dev = $upgrade_major = false;
1478                                 $upgrade_minor = true;
1479                         }
1480                 }
1481
1482                 // 1: If we're already on that version, not much point in updating?
1483                 if ( $offered_ver == $wp_version )
1484                         return false;
1485
1486                 // 2: If we're running a newer version, that's a nope
1487                 if ( version_compare( $wp_version, $offered_ver, '>' ) )
1488                         return false;
1489
1490                 $failure_data = get_site_option( 'auto_core_update_failed' );
1491                 if ( $failure_data ) {
1492                         // If this was a critical update failure, cannot update.
1493                         if ( ! empty( $failure_data['critical'] ) )
1494                                 return false;
1495
1496                         // Don't claim we can update on update-core.php if we have a non-critical failure logged.
1497                         if ( $wp_version == $failure_data['current'] && false !== strpos( $offered_ver, '.1.next.minor' ) )
1498                                 return false;
1499
1500                         // Cannot update if we're retrying the same A to B update that caused a non-critical failure.
1501                         // Some non-critical failures do allow retries, like download_failed.
1502                         // 3.7.1 => 3.7.2 resulted in files_not_writable, if we are still on 3.7.1 and still trying to update to 3.7.2.
1503                         if ( empty( $failure_data['retry'] ) && $wp_version == $failure_data['current'] && $offered_ver == $failure_data['attempted'] )
1504                                 return false;
1505                 }
1506
1507                 // 3: 3.7-alpha-25000 -> 3.7-alpha-25678 -> 3.7-beta1 -> 3.7-beta2
1508                 if ( $current_is_development_version ) {
1509                         if ( ! apply_filters( 'allow_dev_auto_core_updates', $upgrade_dev ) )
1510                                 return false;
1511                         // else fall through to minor + major branches below
1512                 }
1513
1514                 // 4: Minor In-branch updates (3.7.0 -> 3.7.1 -> 3.7.2 -> 3.7.4)
1515                 if ( $current_branch == $new_branch )
1516                         return apply_filters( 'allow_minor_auto_core_updates', $upgrade_minor );
1517
1518                 // 5: Major version updates (3.7.0 -> 3.8.0 -> 3.9.1)
1519                 if ( version_compare( $new_branch, $current_branch, '>' ) )
1520                         return apply_filters( 'allow_major_auto_core_updates', $upgrade_major );
1521
1522                 // If we're not sure, we don't want it
1523                 return false;
1524         }
1525
1526         function check_files() {
1527                 global $wp_version, $wp_local_package;
1528
1529                 $checksums = get_core_checksums( $wp_version, isset( $wp_local_package ) ? $wp_local_package : 'en_US' );
1530
1531                 if ( ! is_array( $checksums ) )
1532                         return false;
1533
1534                 foreach ( $checksums as $file => $checksum ) {
1535                         // Skip files which get updated
1536                         if ( 'wp-content' == substr( $file, 0, 10 ) )
1537                                 continue;
1538                         if ( ! file_exists( ABSPATH . $file ) || md5_file( ABSPATH . $file ) !== $checksum )
1539                                 return false;
1540                 }
1541
1542                 return true;
1543         }
1544 }
1545
1546 /**
1547  * Upgrade Skin helper for File uploads. This class handles the upload process and passes it as if it's a local file to the Upgrade/Installer functions.
1548  *
1549  * @package WordPress
1550  * @subpackage Upgrader
1551  * @since 2.8.0
1552  */
1553 class File_Upload_Upgrader {
1554         var $package;
1555         var $filename;
1556         var $id = 0;
1557
1558         function __construct($form, $urlholder) {
1559
1560                 if ( empty($_FILES[$form]['name']) && empty($_GET[$urlholder]) )
1561                         wp_die(__('Please select a file'));
1562
1563                 //Handle a newly uploaded file, Else assume it's already been uploaded
1564                 if ( ! empty($_FILES) ) {
1565                         $overrides = array( 'test_form' => false, 'test_type' => false );
1566                         $file = wp_handle_upload( $_FILES[$form], $overrides );
1567
1568                         if ( isset( $file['error'] ) )
1569                                 wp_die( $file['error'] );
1570
1571                         $this->filename = $_FILES[$form]['name'];
1572                         $this->package = $file['file'];
1573
1574                         // Construct the object array
1575                         $object = array(
1576                                 'post_title' => $this->filename,
1577                                 'post_content' => $file['url'],
1578                                 'post_mime_type' => $file['type'],
1579                                 'guid' => $file['url'],
1580                                 'context' => 'upgrader',
1581                                 'post_status' => 'private'
1582                         );
1583
1584                         // Save the data
1585                         $this->id = wp_insert_attachment( $object, $file['file'] );
1586
1587                         // schedule a cleanup for 2 hours from now in case of failed install
1588                         wp_schedule_single_event( time() + 7200, 'upgrader_scheduled_cleanup', array( $this->id ) );
1589
1590                 } elseif ( is_numeric( $_GET[$urlholder] ) ) {
1591                         // Numeric Package = previously uploaded file, see above.
1592                         $this->id = (int) $_GET[$urlholder];
1593                         $attachment = get_post( $this->id );
1594                         if ( empty($attachment) )
1595                                 wp_die(__('Please select a file'));
1596
1597                         $this->filename = $attachment->post_title;
1598                         $this->package = get_attached_file( $attachment->ID );
1599                 } else {
1600                         // Else, It's set to something, Back compat for plugins using the old (pre-3.3) File_Uploader handler.
1601                         if ( ! ( ( $uploads = wp_upload_dir() ) && false === $uploads['error'] ) )
1602                                 wp_die( $uploads['error'] );
1603
1604                         $this->filename = $_GET[$urlholder];
1605                         $this->package = $uploads['basedir'] . '/' . $this->filename;
1606                 }
1607         }
1608
1609         function cleanup() {
1610                 if ( $this->id )
1611                         wp_delete_attachment( $this->id );
1612
1613                 elseif ( file_exists( $this->package ) )
1614                         return @unlink( $this->package );
1615
1616                 return true;
1617         }
1618 }
1619
1620 /**
1621  * The WordPress automatic background updater.
1622  *
1623  * @package WordPress
1624  * @subpackage Upgrader
1625  * @since 3.7.0
1626  */
1627 class WP_Automatic_Updater {
1628
1629         /**
1630          * Tracks update results during processing.
1631          *
1632          * @var array
1633          */
1634         protected $update_results = array();
1635
1636         /**
1637          * Whether the entire automatic updater is disabled.
1638          *
1639          * @since 3.7.0
1640          */
1641         public function is_disabled() {
1642                 // Background updates are disabled if you don't want file changes.
1643                 if ( defined( 'DISALLOW_FILE_MODS' ) && DISALLOW_FILE_MODS )
1644                         return true;
1645
1646                 if ( defined( 'WP_INSTALLING' ) )
1647                         return true;
1648
1649                 // More fine grained control can be done through the WP_AUTO_UPDATE_CORE constant and filters.
1650                 $disabled = defined( 'AUTOMATIC_UPDATER_DISABLED' ) && AUTOMATIC_UPDATER_DISABLED;
1651
1652                 /**
1653                  * Filter whether to entirely disable background updates.
1654                  *
1655                  * There are more fine-grained filters and controls for selective disabling.
1656                  * This filter parallels the AUTOMATIC_UPDATER_DISABLED constant in name.
1657                  *
1658                  * This also disables update notification emails. That may change in the future.
1659                  *
1660                  * @since 3.7.0
1661                  * @param bool $disabled Whether the updater should be disabled.
1662                  */
1663                 return apply_filters( 'automatic_updater_disabled', $disabled );
1664         }
1665
1666         /**
1667          * Check for version control checkouts.
1668          *
1669          * Checks for Subversion, Git, Mercurial, and Bazaar. It recursively looks up the
1670          * filesystem to the top of the drive, erring on the side of detecting a VCS
1671          * checkout somewhere.
1672          *
1673          * ABSPATH is always checked in addition to whatever $context is (which may be the
1674          * wp-content directory, for example). The underlying assumption is that if you are
1675          * using version control *anywhere*, then you should be making decisions for
1676          * how things get updated.
1677          *
1678          * @since 3.7.0
1679          *
1680          * @param string $context The filesystem path to check, in addition to ABSPATH.
1681          */
1682         public function is_vcs_checkout( $context ) {
1683                 $context_dirs = array( untrailingslashit( $context ) );
1684                 if ( $context !== ABSPATH )
1685                         $context_dirs[] = untrailingslashit( ABSPATH );
1686
1687                 $vcs_dirs = array( '.svn', '.git', '.hg', '.bzr' );
1688                 $check_dirs = array();
1689
1690                 foreach ( $context_dirs as $context_dir ) {
1691                         // Walk up from $context_dir to the root.
1692                         do {
1693                                 $check_dirs[] = $context_dir;
1694
1695                                 // Once we've hit '/' or 'C:\', we need to stop. dirname will keep returning the input here.
1696                                 if ( $context_dir == dirname( $context_dir ) )
1697                                         break;
1698
1699                         // Continue one level at a time.
1700                         } while ( $context_dir = dirname( $context_dir ) );
1701                 }
1702
1703                 $check_dirs = array_unique( $check_dirs );
1704
1705                 // Search all directories we've found for evidence of version control.
1706                 foreach ( $vcs_dirs as $vcs_dir ) {
1707                         foreach ( $check_dirs as $check_dir ) {
1708                                 if ( $checkout = @is_dir( rtrim( $check_dir, '\\/' ) . "/$vcs_dir" ) )
1709                                         break 2;
1710                         }
1711                 }
1712
1713                 /**
1714                  * Filter whether the automatic updater should consider a filesystem location to be potentially
1715                  * managed by a version control system.
1716                  *
1717                  * @since 3.7.0
1718                  *
1719                  * @param bool $checkout  Whether a VCS checkout was discovered at $context or ABSPATH, or anywhere higher.
1720                  * @param string $context The filesystem context (a path) against which filesystem status should be checked.
1721                  */
1722                 return apply_filters( 'automatic_updates_is_vcs_checkout', $checkout, $context );
1723         }
1724
1725         /**
1726          * Tests to see if we can and should update a specific item.
1727          *
1728          * @since 3.7.0
1729          *
1730          * @param string $type    The type of update being checked: 'core', 'theme', 'plugin', 'translation'.
1731          * @param object $item    The update offer.
1732          * @param string $context The filesystem context (a path) against which filesystem access and status
1733          *                        should be checked.
1734          */
1735         public function should_update( $type, $item, $context ) {
1736                 // Used to see if WP_Filesystem is set up to allow unattended updates.
1737                 $skin = new Automatic_Upgrader_Skin;
1738
1739                 if ( $this->is_disabled() )
1740                         return false;
1741
1742                 // If we can't do an auto core update, we may still be able to email the user.
1743                 if ( ! $skin->request_filesystem_credentials( false, $context ) || $this->is_vcs_checkout( $context ) ) {
1744                         if ( 'core' == $type )
1745                                 $this->send_core_update_notification_email( $item );
1746                         return false;
1747                 }
1748
1749                 // Next up, is this an item we can update?
1750                 if ( 'core' == $type )
1751                         $update = Core_Upgrader::should_update_to_version( $item->current );
1752                 else
1753                         $update = ! empty( $item->autoupdate );
1754
1755                 /**
1756                  * Filter whether to automatically update core, a plugin, a theme, or a language.
1757                  *
1758                  * The dynamic portion of the hook name, $type, refers to the type of update
1759                  * being checked. Can be 'core', 'theme', 'plugin', or 'translation'.
1760                  *
1761                  * Generally speaking, plugins, themes, and major core versions are not updated by default,
1762                  * while translations and minor and development versions for core are updated by default.
1763                  *
1764                  * See the filters allow_dev_auto_core_updates, allow_minor_auto_core_updates, and
1765                  * allow_major_auto_core_updates more straightforward filters to adjust core updates.
1766                  *
1767                  * @since 3.7.0
1768                  *
1769                  * @param bool   $update Whether to update.
1770                  * @param object $item   The update offer.
1771                  */
1772                 $update = apply_filters( 'auto_update_' . $type, $update, $item );
1773
1774                 if ( ! $update ) {
1775                         if ( 'core' == $type )
1776                                 $this->send_core_update_notification_email( $item );
1777                         return false;
1778                 }
1779
1780                 // If it's a core update, are we actually compatible with its requirements?
1781                 if ( 'core' == $type ) {
1782                         global $wpdb;
1783
1784                         $php_compat = version_compare( phpversion(), $item->php_version, '>=' );
1785                         if ( file_exists( WP_CONTENT_DIR . '/db.php' ) && empty( $wpdb->is_mysql ) )
1786                                 $mysql_compat = true;
1787                         else
1788                                 $mysql_compat = version_compare( $wpdb->db_version(), $item->mysql_version, '>=' );
1789
1790                         if ( ! $php_compat || ! $mysql_compat )
1791                                 return false;
1792                 }
1793
1794                 return true;
1795         }
1796
1797         /**
1798          * Notifies an administrator of a core update.
1799          *
1800          * @since 3.7.0
1801          *
1802          * @param object $item The update offer.
1803          */
1804         protected function send_core_update_notification_email( $item ) {
1805                 $notify   = true;
1806                 $notified = get_site_option( 'auto_core_update_notified' );
1807
1808                 // Don't notify if we've already notified the same email address of the same version.
1809                 if ( $notified && $notified['email'] == get_site_option( 'admin_email' ) && $notified['version'] == $item->current )
1810                         return false;
1811
1812                 // See if we need to notify users of a core update.
1813                 $notify = ! empty( $item->notify_email );
1814
1815                 /**
1816                  * Whether to notify the site administrator of a new core update.
1817                  *
1818                  * By default, administrators are notified when the update offer received from WordPress.org
1819                  * sets a particular flag. This allows for discretion in if and when to notify.
1820                  *
1821                  * This filter only fires once per release -- if the same email address was already
1822                  * notified of the same new version, we won't repeatedly email the administrator.
1823                  *
1824                  * This filter is also used on about.php to check if a plugin has disabled these notifications.
1825                  *
1826                  * @since 3.7.0
1827                  *
1828                  * @param bool $notify Whether the site administrator is notified.
1829                  * @param object $item The update offer.
1830                  */
1831                 if ( ! apply_filters( 'send_core_update_notification_email', $notify, $item ) )
1832                         return false;
1833
1834                 $this->send_email( 'manual', $item );
1835                 return true;
1836         }
1837
1838         /**
1839          * Update an item, if appropriate.
1840          *
1841          * @since 3.7.0
1842          *
1843          * @param string $type The type of update being checked: 'core', 'theme', 'plugin', 'translation'.
1844          * @param object $item The update offer.
1845          */
1846         public function update( $type, $item ) {
1847                 $skin = new Automatic_Upgrader_Skin;
1848
1849                 switch ( $type ) {
1850                         case 'core':
1851                                 // The Core upgrader doesn't use the Upgrader's skin during the actual main part of the upgrade, instead, firing a filter.
1852                                 add_filter( 'update_feedback', array( $skin, 'feedback' ) );
1853                                 $upgrader = new Core_Upgrader( $skin );
1854                                 $context  = ABSPATH;
1855                                 break;
1856                         case 'plugin':
1857                                 $upgrader = new Plugin_Upgrader( $skin );
1858                                 $context  = WP_PLUGIN_DIR; // We don't support custom Plugin directories, or updates for WPMU_PLUGIN_DIR
1859                                 break;
1860                         case 'theme':
1861                                 $upgrader = new Theme_Upgrader( $skin );
1862                                 $context  = get_theme_root( $item );
1863                                 break;
1864                         case 'translation':
1865                                 $upgrader = new Language_Pack_Upgrader( $skin );
1866                                 $context  = WP_CONTENT_DIR; // WP_LANG_DIR;
1867                                 break;
1868                 }
1869
1870                 // Determine whether we can and should perform this update.
1871                 if ( ! $this->should_update( $type, $item, $context ) )
1872                         return false;
1873
1874                 switch ( $type ) {
1875                         case 'core':
1876                                 $skin->feedback( __( 'Updating to WordPress %s' ), $item->version );
1877                                 $item_name = sprintf( __( 'WordPress %s' ), $item->version );
1878                                 break;
1879                         case 'theme':
1880                                 $theme = wp_get_theme( $item );
1881                                 $item_name = $theme->Get( 'Name' );
1882                                 $skin->feedback( __( 'Updating theme: %s' ), $item_name );
1883                                 break;
1884                         case 'plugin':
1885                                 $plugin_data = get_plugin_data( $context . '/' . $item );
1886                                 $item_name = $plugin_data['Name'];
1887                                 $skin->feedback( __( 'Updating plugin: %s' ), $item_name );
1888                                 break;
1889                         case 'translation':
1890                                 $language_item_name = $upgrader->get_name_for_update( $item );
1891                                 $item_name = sprintf( __( 'Translations for %s' ), $language_item_name );
1892                                 $skin->feedback( sprintf( __( 'Updating translations for %1$s (%2$s)&#8230;' ), $language_item_name, $item->language ) );
1893                                 break;
1894                 }
1895
1896                 // Boom, This sites about to get a whole new splash of paint!
1897                 $upgrade_result = $upgrader->upgrade( $item, array(
1898                         'clear_update_cache' => false,
1899                         'pre_check_md5'      => false, /* always use partial builds if possible for core updates */
1900                         'attempt_rollback'   => true, /* only available for core updates */
1901                 ) );
1902
1903                 // if the filesystem is unavailable, false is returned.
1904                 if ( false === $upgrade_result ) {
1905                         $upgrade_result = new WP_Error( 'fs_unavailable', __( 'Could not access filesystem.' ) );
1906                 }
1907
1908                 // Core doesn't output this, so lets append it so we don't get confused
1909                 if ( 'core' == $type ) {
1910                         if ( is_wp_error( $upgrade_result ) ) {
1911                                 $skin->error( __( 'Installation Failed' ), $upgrade_result );
1912                         } else {
1913                                 $skin->feedback( __( 'WordPress updated successfully' ) );
1914                         }
1915                 }
1916
1917                 $this->update_results[ $type ][] = (object) array(
1918                         'item'     => $item,
1919                         'result'   => $upgrade_result,
1920                         'name'     => $item_name,
1921                         'messages' => $skin->get_upgrade_messages()
1922                 );
1923
1924                 return $upgrade_result;
1925         }
1926
1927         /**
1928          * Kicks off the background update process, looping through all pending updates.
1929          *
1930          * @since 3.7.0
1931          */
1932         public function run() {
1933                 global $wpdb, $wp_version;
1934
1935                 if ( $this->is_disabled() )
1936                         return;
1937
1938                 if ( ! is_main_network() || ! is_main_site() )
1939                         return;
1940
1941                 $lock_name = 'auto_updater.lock';
1942
1943                 // Try to lock
1944                 $lock_result = $wpdb->query( $wpdb->prepare( "INSERT IGNORE INTO `$wpdb->options` ( `option_name`, `option_value`, `autoload` ) VALUES (%s, %s, 'no') /* LOCK */", $lock_name, time() ) );
1945
1946                 if ( ! $lock_result ) {
1947                         $lock_result = get_option( $lock_name );
1948
1949                         // If we couldn't create a lock, and there isn't a lock, bail
1950                         if ( ! $lock_result )
1951                                 return;
1952
1953                         // Check to see if the lock is still valid
1954                         if ( $lock_result > ( time() - HOUR_IN_SECONDS ) )
1955                                 return;
1956                 }
1957
1958                 // Update the lock, as by this point we've definately got a lock, just need to fire the actions
1959                 update_option( $lock_name, time() );
1960
1961                 // Don't automatically run these thins, as we'll handle it ourselves
1962                 remove_action( 'upgrader_process_complete', array( 'Language_Pack_Upgrader', 'async_upgrade' ), 20 );
1963                 remove_action( 'upgrader_process_complete', 'wp_version_check' );
1964                 remove_action( 'upgrader_process_complete', 'wp_update_plugins' );
1965                 remove_action( 'upgrader_process_complete', 'wp_update_themes' );
1966
1967                 // Next, Plugins
1968                 wp_update_plugins(); // Check for Plugin updates
1969                 $plugin_updates = get_site_transient( 'update_plugins' );
1970                 if ( $plugin_updates && !empty( $plugin_updates->response ) ) {
1971                         foreach ( array_keys( $plugin_updates->response ) as $plugin ) {
1972                                 $this->update( 'plugin', $plugin );
1973                         }
1974                         // Force refresh of plugin update information
1975                         wp_clean_plugins_cache();
1976                 }
1977
1978                 // Next, those themes we all love
1979                 wp_update_themes();  // Check for Theme updates
1980                 $theme_updates = get_site_transient( 'update_themes' );
1981                 if ( $theme_updates && !empty( $theme_updates->response ) ) {
1982                         foreach ( array_keys( $theme_updates->response ) as $theme ) {
1983                                 $this->update( 'theme', $theme );
1984                         }
1985                         // Force refresh of theme update information
1986                         wp_clean_themes_cache();
1987                 }
1988
1989                 // Next, Process any core update
1990                 wp_version_check(); // Check for Core updates
1991                 $core_update = find_core_auto_update();
1992
1993                 if ( $core_update )
1994                         $this->update( 'core', $core_update );
1995
1996                 // Clean up, and check for any pending translations
1997                 // (Core_Upgrader checks for core updates)
1998                 wp_update_themes();  // Check for Theme updates
1999                 wp_update_plugins(); // Check for Plugin updates
2000
2001                 // Finally, Process any new translations
2002                 $language_updates = wp_get_translation_updates();
2003                 if ( $language_updates ) {
2004                         foreach ( $language_updates as $update ) {
2005                                 $this->update( 'translation', $update );
2006                         }
2007
2008                         // Clear existing caches
2009                         wp_clean_plugins_cache();
2010                         wp_clean_themes_cache();
2011                         delete_site_transient( 'update_core' );
2012
2013                         wp_version_check();  // check for Core updates
2014                         wp_update_themes();  // Check for Theme updates
2015                         wp_update_plugins(); // Check for Plugin updates
2016                 }
2017
2018                 // Send debugging email to all development installs.
2019                 if ( ! empty( $this->update_results ) ) {
2020                         $development_version = false !== strpos( $wp_version, '-' );
2021                         /**
2022                          * Filter whether to send a debugging email for each automatic background update.
2023                          *
2024                          * @since 3.7.0
2025                          * @param bool $development_version By default, emails are sent if the install is a development version.
2026                          *                                  Return false to avoid the email.
2027                          */
2028                         if ( apply_filters( 'automatic_updates_send_debug_email', $development_version ) )
2029                                 $this->send_debug_email();
2030
2031                         if ( ! empty( $this->update_results['core'] ) )
2032                                 $this->after_core_update( $this->update_results['core'][0] );
2033
2034                         /**
2035                          * Action triggered after all automatic updates have run.
2036                          *
2037                          * @since 3.8.0
2038                          *
2039                          * @param array $update_results The results of all attempted updates.
2040                          */
2041                         do_action( 'automatic_updates_complete', $this->update_results );
2042                 }
2043
2044                 // Clear the lock
2045                 delete_option( $lock_name );
2046         }
2047
2048         /**
2049          * If we tried to perform a core update, check if we should send an email,
2050          * and if we need to avoid processing future updates.
2051          *
2052          * @param object $update_result The result of the core update. Includes the update offer and result.
2053          */
2054         protected function after_core_update( $update_result ) {
2055                 global $wp_version;
2056
2057                 $core_update = $update_result->item;
2058                 $result      = $update_result->result;
2059
2060                 if ( ! is_wp_error( $result ) ) {
2061                         $this->send_email( 'success', $core_update );
2062                         return;
2063                 }
2064
2065                 $error_code = $result->get_error_code();
2066
2067                 // Any of these WP_Error codes are critical failures, as in they occurred after we started to copy core files.
2068                 // We should not try to perform a background update again until there is a successful one-click update performed by the user.
2069                 $critical = false;
2070                 if ( $error_code === 'disk_full' || false !== strpos( $error_code, '__copy_dir' ) ) {
2071                         $critical = true;
2072                 } elseif ( $error_code === 'rollback_was_required' && is_wp_error( $result->get_error_data()->rollback ) ) {
2073                         // A rollback is only critical if it failed too.
2074                         $critical = true;
2075                         $rollback_result = $result->get_error_data()->rollback;
2076                 } elseif ( false !== strpos( $error_code, 'do_rollback' ) ) {
2077                         $critical = true;
2078                 }
2079
2080                 if ( $critical ) {
2081                         $critical_data = array(
2082                                 'attempted'  => $core_update->current,
2083                                 'current'    => $wp_version,
2084                                 'error_code' => $error_code,
2085                                 'error_data' => $result->get_error_data(),
2086                                 'timestamp'  => time(),
2087                                 'critical'   => true,
2088                         );
2089                         if ( isset( $rollback_result ) ) {
2090                                 $critical_data['rollback_code'] = $rollback_result->get_error_code();
2091                                 $critical_data['rollback_data'] = $rollback_result->get_error_data();
2092                         }
2093                         update_site_option( 'auto_core_update_failed', $critical_data );
2094                         $this->send_email( 'critical', $core_update, $result );
2095                         return;
2096                 }
2097
2098                 /*
2099                  * Any other WP_Error code (like download_failed or files_not_writable) occurs before
2100                  * we tried to copy over core files. Thus, the failures are early and graceful.
2101                  *
2102                  * We should avoid trying to perform a background update again for the same version.
2103                  * But we can try again if another version is released.
2104                  *
2105                  * For certain 'transient' failures, like download_failed, we should allow retries.
2106                  * In fact, let's schedule a special update for an hour from now. (It's possible
2107                  * the issue could actually be on WordPress.org's side.) If that one fails, then email.
2108                  */
2109                 $send = true;
2110                 $transient_failures = array( 'incompatible_archive', 'download_failed', 'insane_distro' );
2111                 if ( in_array( $error_code, $transient_failures ) && ! get_site_option( 'auto_core_update_failed' ) ) {
2112                         wp_schedule_single_event( time() + HOUR_IN_SECONDS, 'wp_maybe_auto_update' );
2113                         $send = false;
2114                 }
2115
2116                 $n = get_site_option( 'auto_core_update_notified' );
2117                 // Don't notify if we've already notified the same email address of the same version of the same notification type.
2118                 if ( $n && 'fail' == $n['type'] && $n['email'] == get_site_option( 'admin_email' ) && $n['version'] == $core_update->current )
2119                         $send = false;
2120
2121                 update_site_option( 'auto_core_update_failed', array(
2122                         'attempted'  => $core_update->current,
2123                         'current'    => $wp_version,
2124                         'error_code' => $error_code,
2125                         'error_data' => $result->get_error_data(),
2126                         'timestamp'  => time(),
2127                         'retry'      => in_array( $error_code, $transient_failures ),
2128                 ) );
2129
2130                 if ( $send )
2131                         $this->send_email( 'fail', $core_update, $result );
2132         }
2133
2134         /**
2135          * Sends an email upon the completion or failure of a background core update.
2136          *
2137          * @since 3.7.0
2138          *
2139          * @param string $type        The type of email to send. Can be one of 'success', 'fail', 'manual', 'critical'.
2140          * @param object $core_update The update offer that was attempted.
2141          * @param mixed  $result      Optional. The result for the core update. Can be WP_Error.
2142          */
2143         protected function send_email( $type, $core_update, $result = null ) {
2144                 update_site_option( 'auto_core_update_notified', array(
2145                         'type'      => $type,
2146                         'email'     => get_site_option( 'admin_email' ),
2147                         'version'   => $core_update->current,
2148                         'timestamp' => time(),
2149                 ) );
2150
2151                 $next_user_core_update = get_preferred_from_update_core();
2152                 // If the update transient is empty, use the update we just performed
2153                 if ( ! $next_user_core_update )
2154                         $next_user_core_update = $core_update;
2155                 $newer_version_available = ( 'upgrade' == $next_user_core_update->response && version_compare( $next_user_core_update->version, $core_update->version, '>' ) );
2156
2157                 /**
2158                  * Filter whether to send an email following an automatic background core update.
2159                  *
2160                  * @since 3.7.0
2161                  *
2162                  * @param bool   $send        Whether to send the email. Default true.
2163                  * @param string $type        The type of email to send. Can be one of 'success', 'fail', 'critical'.
2164                  * @param object $core_update The update offer that was attempted.
2165                  * @param mixed  $result      The result for the core update. Can be WP_Error.
2166                  */
2167                 if ( 'manual' !== $type && ! apply_filters( 'auto_core_update_send_email', true, $type, $core_update, $result ) )
2168                         return;
2169
2170                 switch ( $type ) {
2171                         case 'success' : // We updated.
2172                                 /* translators: 1: Site name, 2: WordPress version number. */
2173                                 $subject = __( '[%1$s] Your site has updated to WordPress %2$s' );
2174                                 break;
2175
2176                         case 'fail' :   // We tried to update but couldn't.
2177                         case 'manual' : // We can't update (and made no attempt).
2178                                 /* translators: 1: Site name, 2: WordPress version number. */
2179                                 $subject = __( '[%1$s] WordPress %2$s is available. Please update!' );
2180                                 break;
2181
2182                         case 'critical' : // We tried to update, started to copy files, then things went wrong.
2183                                 /* translators: 1: Site name. */
2184                                 $subject = __( '[%1$s] URGENT: Your site may be down due to a failed update' );
2185                                 break;
2186
2187                         default :
2188                                 return;
2189                 }
2190
2191                 // If the auto update is not to the latest version, say that the current version of WP is available instead.
2192                 $version = 'success' === $type ? $core_update->current : $next_user_core_update->current;
2193                 $subject = sprintf( $subject, wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES ), $version );
2194
2195                 $body = '';
2196
2197                 switch ( $type ) {
2198                         case 'success' :
2199                                 $body .= sprintf( __( 'Howdy! Your site at %1$s has been updated automatically to WordPress %2$s.' ), home_url(), $core_update->current );
2200                                 $body .= "\n\n";
2201                                 if ( ! $newer_version_available )
2202                                         $body .= __( 'No further action is needed on your part.' ) . ' ';
2203
2204                                 // Can only reference the About screen if their update was successful.
2205                                 list( $about_version ) = explode( '-', $core_update->current, 2 );
2206                                 $body .= sprintf( __( "For more on version %s, see the About WordPress screen:" ), $about_version );
2207                                 $body .= "\n" . admin_url( 'about.php' );
2208
2209                                 if ( $newer_version_available ) {
2210                                         $body .= "\n\n" . sprintf( __( 'WordPress %s is also now available.' ), $next_user_core_update->current ) . ' ';
2211                                         $body .= __( 'Updating is easy and only takes a few moments:' );
2212                                         $body .= "\n" . network_admin_url( 'update-core.php' );
2213                                 }
2214
2215                                 break;
2216
2217                         case 'fail' :
2218                         case 'manual' :
2219                                 $body .= sprintf( __( 'Please update your site at %1$s to WordPress %2$s.' ), home_url(), $next_user_core_update->current );
2220
2221                                 $body .= "\n\n";
2222
2223                                 // Don't show this message if there is a newer version available.
2224                                 // Potential for confusion, and also not useful for them to know at this point.
2225                                 if ( 'fail' == $type && ! $newer_version_available )
2226                                         $body .= __( 'We tried but were unable to update your site automatically.' ) . ' ';
2227
2228                                 $body .= __( 'Updating is easy and only takes a few moments:' );
2229                                 $body .= "\n" . network_admin_url( 'update-core.php' );
2230                                 break;
2231
2232                         case 'critical' :
2233                                 if ( $newer_version_available )
2234                                         $body .= sprintf( __( 'Your site at %1$s experienced a critical failure while trying to update WordPress to version %2$s.' ), home_url(), $core_update->current );
2235                                 else
2236                                         $body .= sprintf( __( 'Your site at %1$s experienced a critical failure while trying to update to the latest version of WordPress, %2$s.' ), home_url(), $core_update->current );
2237
2238                                 $body .= "\n\n" . __( "This means your site may be offline or broken. Don't panic; this can be fixed." );
2239
2240                                 $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:" );
2241                                 $body .= "\n" . network_admin_url( 'update-core.php' );
2242                                 break;
2243                 }
2244
2245                 // Updates are important!
2246                 if ( $type != 'success' || $newer_version_available )
2247                         $body .= "\n\n" . __( 'Keeping your site updated is important for security. It also makes the internet a safer place for you and your readers.' );
2248
2249                 // Add a note about the support forums to all emails.
2250                 $body .= "\n\n" . __( 'If you experience any issues or need support, the volunteers in the WordPress.org support forums may be able to help.' );
2251                 $body .= "\n" . __( 'http://wordpress.org/support/' );
2252
2253                 // If things are successful and we're now on the latest, mention plugins and themes if any are out of date.
2254                 if ( $type == 'success' && ! $newer_version_available && ( get_plugin_updates() || get_theme_updates() ) ) {
2255                         $body .= "\n\n" . __( 'You also have some plugins or themes with updates available. Update them now:' );
2256                         $body .= "\n" . network_admin_url();
2257                 }
2258
2259                 $body .= "\n\n" . __( 'The WordPress Team' ) . "\n";
2260
2261                 if ( 'critical' == $type && is_wp_error( $result ) ) {
2262                         $body .= "\n***\n\n";
2263                         $body .= sprintf( __( 'Your site was running version %s.' ), $GLOBALS['wp_version'] );
2264                         $body .= ' ' . __( 'We have some data that describes the error your site encountered.' );
2265                         $body .= ' ' . __( 'Your hosting company, support forum volunteers, or a friendly developer may be able to use this information to help you:' );
2266
2267                         // If we had a rollback and we're still critical, then the rollback failed too.
2268                         // Loop through all errors (the main WP_Error, the update result, the rollback result) for code, data, etc.
2269                         if ( 'rollback_was_required' == $result->get_error_code() )
2270                                 $errors = array( $result, $result->get_error_data()->update, $result->get_error_data()->rollback );
2271                         else
2272                                 $errors = array( $result );
2273
2274                         foreach ( $errors as $error ) {
2275                                 if ( ! is_wp_error( $error ) )
2276                                         continue;
2277                                 $error_code = $error->get_error_code();
2278                                 $body .= "\n\n" . sprintf( __( "Error code: %s" ), $error_code );
2279                                 if ( 'rollback_was_required' == $error_code )
2280                                         continue;
2281                                 if ( $error->get_error_message() )
2282                                         $body .= "\n" . $error->get_error_message();
2283                                 $error_data = $error->get_error_data();
2284                                 if ( $error_data )
2285                                         $body .= "\n" . implode( ', ', (array) $error_data );
2286                         }
2287                         $body .= "\n";
2288                 }
2289
2290                 $to  = get_site_option( 'admin_email' );
2291                 $headers = '';
2292
2293                 $email = compact( 'to', 'subject', 'body', 'headers' );
2294                 /**
2295                  * Filter the email sent following an automatic background core update.
2296                  *
2297                  * @since 3.7.0
2298                  *
2299                  * @param array $email {
2300                  *     Array of email arguments that will be passed to wp_mail().
2301                  *
2302                  *     @type string $to      The email recipient. An array of emails can be returned, as handled by wp_mail().
2303                  *     @type string $subject The email's subject.
2304                  *     @type string $body    The email message body.
2305                  *     @type string $headers Any email headers, defaults to no headers.
2306                  * }
2307                  * @param string $type        The type of email being sent. Can be one of 'success', 'fail', 'manual', 'critical'.
2308                  * @param object $core_update The update offer that was attempted.
2309                  * @param mixed  $result      The result for the core update. Can be WP_Error.
2310                  */
2311                 $email = apply_filters( 'auto_core_update_email', $email, $type, $core_update, $result );
2312
2313                 wp_mail( $email['to'], $email['subject'], $email['body'], $email['headers'] );
2314         }
2315
2316         /**
2317          * Prepares and sends an email of a full log of background update results, useful for debugging and geekery.
2318          *
2319          * @since 3.7.0
2320          */
2321         protected function send_debug_email() {
2322                 $update_count = 0;
2323                 foreach ( $this->update_results as $type => $updates )
2324                         $update_count += count( $updates );
2325
2326                 $body = array();
2327                 $failures = 0;
2328
2329                 $body[] = sprintf( __( 'WordPress site: %s' ), network_home_url( '/' ) );
2330
2331                 // Core
2332                 if ( isset( $this->update_results['core'] ) ) {
2333                         $result = $this->update_results['core'][0];
2334                         if ( $result->result && ! is_wp_error( $result->result ) ) {
2335                                 $body[] = sprintf( __( 'SUCCESS: WordPress was successfully updated to %s' ), $result->name );
2336                         } else {
2337                                 $body[] = sprintf( __( 'FAILED: WordPress failed to update to %s' ), $result->name );
2338                                 $failures++;
2339                         }
2340                         $body[] = '';
2341                 }
2342
2343                 // Plugins, Themes, Translations
2344                 foreach ( array( 'plugin', 'theme', 'translation' ) as $type ) {
2345                         if ( ! isset( $this->update_results[ $type ] ) )
2346                                 continue;
2347                         $success_items = wp_list_filter( $this->update_results[ $type ], array( 'result' => true ) );
2348                         if ( $success_items ) {
2349                                 $messages = array(
2350                                         'plugin'      => __( 'The following plugins were successfully updated:' ),
2351                                         'theme'       => __( 'The following themes were successfully updated:' ),
2352                                         'translation' => __( 'The following translations were successfully updated:' ),
2353                                 );
2354
2355                                 $body[] = $messages[ $type ];
2356                                 foreach ( wp_list_pluck( $success_items, 'name' ) as $name ) {
2357                                         $body[] = ' * ' . sprintf( __( 'SUCCESS: %s' ), $name );
2358                                 }
2359                         }
2360                         if ( $success_items != $this->update_results[ $type ] ) {
2361                                 // Failed updates
2362                                 $messages = array(
2363                                         'plugin'      => __( 'The following plugins failed to update:' ),
2364                                         'theme'       => __( 'The following themes failed to update:' ),
2365                                         'translation' => __( 'The following translations failed to update:' ),
2366                                 );
2367
2368                                 $body[] = $messages[ $type ];
2369                                 foreach ( $this->update_results[ $type ] as $item ) {
2370                                         if ( ! $item->result || is_wp_error( $item->result ) ) {
2371                                                 $body[] = ' * ' . sprintf( __( 'FAILED: %s' ), $item->name );
2372                                                 $failures++;
2373                                         }
2374                                 }
2375                         }
2376                         $body[] = '';
2377                 }
2378
2379                 $site_title = wp_specialchars_decode( get_bloginfo( 'name' ), ENT_QUOTES );
2380                 if ( $failures ) {
2381                         $body[] = __( "
2382 BETA TESTING?
2383 =============
2384
2385 This debugging email is sent when you are using a development version of WordPress.
2386
2387 If you think these failures might be due to a bug in WordPress, could you report it?
2388  * Open a thread in the support forums: http://wordpress.org/support/forum/alphabeta
2389  * Or, if you're comfortable writing a bug report: http://core.trac.wordpress.org/
2390
2391 Thanks! -- The WordPress Team" );
2392
2393                         $subject = sprintf( __( '[%s] There were failures during background updates' ), $site_title );
2394                 } else {
2395                         $subject = sprintf( __( '[%s] Background updates have finished' ), $site_title );
2396                 }
2397
2398                 $body[] = __( 'UPDATE LOG' );
2399                 $body[] = '==========';
2400                 $body[] = '';
2401
2402                 foreach ( array( 'core', 'plugin', 'theme', 'translation' ) as $type ) {
2403                         if ( ! isset( $this->update_results[ $type ] ) )
2404                                 continue;
2405                         foreach ( $this->update_results[ $type ] as $update ) {
2406                                 $body[] = $update->name;
2407                                 $body[] = str_repeat( '-', strlen( $update->name ) );
2408                                 foreach ( $update->messages as $message )
2409                                         $body[] = "  " . html_entity_decode( str_replace( '&#8230;', '...', $message ) );
2410                                 if ( is_wp_error( $update->result ) ) {
2411                                         $results = array( 'update' => $update->result );
2412                                         // If we rolled back, we want to know an error that occurred then too.
2413                                         if ( 'rollback_was_required' === $update->result->get_error_code() )
2414                                                 $results = (array) $update->result->get_error_data();
2415                                         foreach ( $results as $result_type => $result ) {
2416                                                 if ( ! is_wp_error( $result ) )
2417                                                         continue;
2418
2419                                                 if ( 'rollback' === $result_type ) {
2420                                                         /* translators: 1: Error code, 2: Error message. */
2421                                                         $body[] = '  ' . sprintf( __( 'Rollback Error: [%1$s] %2$s' ), $result->get_error_code(), $result->get_error_message() );
2422                                                 } else {
2423                                                         /* translators: 1: Error code, 2: Error message. */
2424                                                         $body[] = '  ' . sprintf( __( 'Error: [%1$s] %2$s' ), $result->get_error_code(), $result->get_error_message() );
2425                                                 }
2426
2427                                                 if ( $result->get_error_data() )
2428                                                         $body[] = '         ' . implode( ', ', (array) $result->get_error_data() );
2429                                         }
2430                                 }
2431                                 $body[] = '';
2432                         }
2433                 }
2434
2435                 $email = array(
2436                         'to'      => get_site_option( 'admin_email' ),
2437                         'subject' => $subject,
2438                         'body'    => implode( "\n", $body ),
2439                         'headers' => ''
2440                 );
2441
2442                 /**
2443                  * Filter the debug email that can be sent following an automatic background core update.
2444                  *
2445                  * @since 3.8.0
2446                  *
2447                  * @param array $email {
2448                  *     Array of email arguments that will be passed to wp_mail().
2449                  *
2450                  *     @type string $to      The email recipient. An array of emails can be returned,
2451                  *                           as handled by wp_mail().
2452                  *     @type string $subject Email subject.
2453                  *     @type string $body    Email message body.
2454                  *     @type string $headers Any email headers. Default empty.
2455                  * }
2456                  * @param int   $failures The number of failures encountered while upgrading.
2457                  * @param mixed $results  The results of all attempted updates.
2458                  */
2459                 $email = apply_filters( 'automatic_updates_debug_email', $email, $failures, $this->update_results );
2460
2461                 wp_mail( $email['to'], $email['subject'], $email['body'], $email['headers'] );
2462         }
2463 }