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         var $show_before = '';
 412
 413         function upgrade_strings() {
 414                 $this->strings['up_to_date'] = __('The plugin is at the latest version.');
 415                 $this->strings['no_package'] = __('Update package not available.');
 416                 $this->strings['downloading_package'] = __('Downloading update from <span class="code">%s</span>&#8230;');
 417                 $this->strings['unpack_package'] = __('Unpacking the update&#8230;');
 418                 $this->strings['remove_old'] = __('Removing the old version of the plugin&#8230;');
 419                 $this->strings['remove_old_failed'] = __('Could not remove the old plugin.');
 420                 $this->strings['process_failed'] = __('Plugin update failed.');
 421                 $this->strings['process_success'] = __('Plugin updated successfully.');
 422         }
 423
 424         function install_strings() {
 425                 $this->strings['no_package'] = __('Install package not available.');
 426                 $this->strings['downloading_package'] = __('Downloading install package from <span class="code">%s</span>&#8230;');
 427                 $this->strings['unpack_package'] = __('Unpacking the package&#8230;');
 428                 $this->strings['installing_package'] = __('Installing the plugin&#8230;');
 429                 $this->strings['no_files'] = __('The plugin contains no files.');
 430                 $this->strings['process_failed'] = __('Plugin install failed.');
 431                 $this->strings['process_success'] = __('Plugin installed successfully.');
 432         }
 433
 434         function install( $package, $args = array() ) {
 435
 436                 $defaults = array(
 437                         'clear_update_cache' => true,
 438                 );
 439                 $parsed_args = wp_parse_args( $args, $defaults );
 440
 441                 $this->init();
 442                 $this->install_strings();
 443
 444                 add_filter('upgrader_source_selection', array($this, 'check_package') );
 445
 446                 $this->run( array(
 447                         'package' => $package,
 448                         'destination' => WP_PLUGIN_DIR,
 449                         'clear_destination' => false, // Do not overwrite files.
 450                         'clear_working' => true,
 451                         'hook_extra' => array(
 452                                 'type' => 'plugin',
 453                                 'action' => 'install',
 454                         )
 455                 ) );
 456
 457                 remove_filter('upgrader_source_selection', array($this, 'check_package') );
 458
 459                 if ( ! $this->result || is_wp_error($this->result) )
 460                         return $this->result;
 461
 462                 // Force refresh of plugin update information
 463                 wp_clean_plugins_cache( $parsed_args['clear_update_cache'] );
 464
 465                 return true;
 466         }
 467
 468         function upgrade( $plugin, $args = array() ) {
 469
 470                 $defaults = array(
 471                         'clear_update_cache' => true,
 472                 );
 473                 $parsed_args = wp_parse_args( $args, $defaults );
 474
 475                 $this->init();
 476                 $this->upgrade_strings();
 477
 478                 $current = get_site_transient( 'update_plugins' );
 479                 if ( !isset( $current->response[ $plugin ] ) ) {
 480                         $this->skin->before();
 481                         $this->skin->set_result(false);
 482                         $this->skin->error('up_to_date');
 483                         $this->skin->after();
 484                         return false;
 485                 }
 486
 487                 // Get the URL to the zip file
 488                 $r = $current->response[ $plugin ];
 489
 490                 add_filter('upgrader_pre_install', array($this, 'deactivate_plugin_before_upgrade'), 10, 2);
 491                 add_filter('upgrader_clear_destination', array($this, 'delete_old_plugin'), 10, 4);
 492                 //'source_selection' => array($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.
 493
 494                 $this->run( array(
 495                         'package' => $r->package,
 496                         'destination' => WP_PLUGIN_DIR,
 497                         'clear_destination' => true,
 498                         'clear_working' => true,
 499                         'hook_extra' => array(
 500                                 'plugin' => $plugin,
 501                                 'type' => 'plugin',
 502                                 'action' => 'update',
 503                         ),
 504                 ) );
 505
 506                 // Cleanup our hooks, in case something else does a upgrade on this connection.
 507                 remove_filter('upgrader_pre_install', array($this, 'deactivate_plugin_before_upgrade'));
 508                 remove_filter('upgrader_clear_destination', array($this, 'delete_old_plugin'));
 509
 510                 if ( ! $this->result || is_wp_error($this->result) )
 511                         return $this->result;
 512
 513                 // Force refresh of plugin update information
 514                 wp_clean_plugins_cache( $parsed_args['clear_update_cache'] );
 515
 516                 return true;
 517         }
 518
 519         function bulk_upgrade( $plugins, $args = array() ) {
 520
 521                 $defaults = array(
 522                         'clear_update_cache' => true,
 523                 );
 524                 $parsed_args = wp_parse_args( $args, $defaults );
 525
 526                 $this->init();
 527                 $this->bulk = true;
 528                 $this->upgrade_strings();
 529
 530                 $current = get_site_transient( 'update_plugins' );
 531
 532                 add_filter('upgrader_clear_destination', array($this, 'delete_old_plugin'), 10, 4);
 533
 534                 $this->skin->header();
 535
 536                 // Connect to the Filesystem first.
 537                 $res = $this->fs_connect( array(WP_CONTENT_DIR, WP_PLUGIN_DIR) );
 538                 if ( ! $res ) {
 539                         $this->skin->footer();
 540                         return false;
 541                 }
 542
 543                 $this->skin->bulk_header();
 544
 545                 // Only start maintenance mode if:
 546                 // - running Multisite and there are one or more plugins specified, OR
 547                 // - a plugin with an update available is currently active.
 548                 // @TODO: For multisite, maintenance mode should only kick in for individual sites if at all possible.
 549                 $maintenance = ( is_multisite() && ! empty( $plugins ) );
 550                 foreach ( $plugins as $plugin )
 551                         $maintenance = $maintenance || ( is_plugin_active( $plugin ) && isset( $current->response[ $plugin] ) );
 552                 if ( $maintenance )
 553                         $this->maintenance_mode(true);
 554
 555                 $results = array();
 556
 557                 $this->update_count = count($plugins);
 558                 $this->update_current = 0;
 559                 foreach ( $plugins as $plugin ) {
 560                         $this->update_current++;
 561                         $this->skin->plugin_info = get_plugin_data( WP_PLUGIN_DIR . '/' . $plugin, false, true);
 562
 563                         if ( !isset( $current->response[ $plugin ] ) ) {
 564                                 $this->skin->set_result(true);
 565                                 $this->skin->before();
 566                                 $this->skin->feedback('up_to_date');
 567                                 $this->skin->after();
 568                                 $results[$plugin] = true;
 569                                 continue;
 570                         }
 571
 572                         // Get the URL to the zip file
 573                         $r = $current->response[ $plugin ];
 574
 575                         $this->skin->plugin_active = is_plugin_active($plugin);
 576
 577                         $result = $this->run( array(
 578                                 'package' => $r->package,
 579                                 'destination' => WP_PLUGIN_DIR,
 580                                 'clear_destination' => true,
 581                                 'clear_working' => true,
 582                                 'is_multi' => true,
 583                                 'hook_extra' => array(
 584                                         'plugin' => $plugin
 585                                 )
 586                         ) );
 587
 588                         $results[$plugin] = $this->result;
 589
 590                         // Prevent credentials auth screen from displaying multiple times
 591                         if ( false === $result )
 592                                 break;
 593                 } //end foreach $plugins
 594
 595                 $this->maintenance_mode(false);
 596
 597                 do_action( 'upgrader_process_complete', $this, array(
 598                         'action' => 'update',
 599                         'type' => 'plugin',
 600                         'bulk' => true,
 601                         'plugins' => $plugins,
 602                 ) );
 603
 604                 $this->skin->bulk_footer();
 605
 606                 $this->skin->footer();
 607
 608                 // Cleanup our hooks, in case something else does a upgrade on this connection.
 609                 remove_filter('upgrader_clear_destination', array($this, 'delete_old_plugin'));
 610
 611                 // Force refresh of plugin update information
 612                 wp_clean_plugins_cache( $parsed_args['clear_update_cache'] );
 613
 614                 return $results;
 615         }
 616
 617         function check_package($source) {
 618                 global $wp_filesystem;
 619
 620                 if ( is_wp_error($source) )
 621                         return $source;
 622
 623                 $working_directory = str_replace( $wp_filesystem->wp_content_dir(), trailingslashit(WP_CONTENT_DIR), $source);
 624                 if ( ! is_dir($working_directory) ) // Sanity check, if the above fails, lets not prevent installation.
 625                         return $source;
 626
 627                 // Check the folder contains at least 1 valid plugin.
 628                 $plugins_found = false;
 629                 foreach ( glob( $working_directory . '*.php' ) as $file ) {
 630                         $info = get_plugin_data($file, false, false);
 631                         if ( !empty( $info['Name'] ) ) {
 632                                 $plugins_found = true;
 633                                 break;
 634                         }
 635                 }
 636
 637                 if ( ! $plugins_found )
 638                         return new WP_Error( 'incompatible_archive_no_plugins', $this->strings['incompatible_archive'], __( 'No valid plugins were found.' ) );
 639
 640                 return $source;
 641         }
 642
 643         //return plugin info.
 644         function plugin_info() {
 645                 if ( ! is_array($this->result) )
 646                         return false;
 647                 if ( empty($this->result['destination_name']) )
 648                         return false;
 649
 650                 $plugin = get_plugins('/' . $this->result['destination_name']); //Ensure to pass with leading slash
 651                 if ( empty($plugin) )
 652                         return false;
 653
 654                 $pluginfiles = array_keys($plugin); //Assume the requested plugin is the first in the list
 655
 656                 return $this->result['destination_name'] . '/' . $pluginfiles[0];
 657         }
 658
 659         //Hooked to pre_install
 660         function deactivate_plugin_before_upgrade($return, $plugin) {
 661
 662                 if ( is_wp_error($return) ) //Bypass.
 663                         return $return;
 664
 665                 // When in cron (background updates) don't deactivate the plugin, as we require a browser to reactivate it
 666                 if ( defined( 'DOING_CRON' ) && DOING_CRON )
 667                         return $return;
 668
 669                 $plugin = isset($plugin['plugin']) ? $plugin['plugin'] : '';
 670                 if ( empty($plugin) )
 671                         return new WP_Error('bad_request', $this->strings['bad_request']);
 672
 673                 if ( is_plugin_active($plugin) ) {
 674                         //Deactivate the plugin silently, Prevent deactivation hooks from running.
 675                         deactivate_plugins($plugin, true);
 676                 }
 677         }
 678
 679         //Hooked to upgrade_clear_destination
 680         function delete_old_plugin($removed, $local_destination, $remote_destination, $plugin) {
 681                 global $wp_filesystem;
 682
 683                 if ( is_wp_error($removed) )
 684                         return $removed; //Pass errors through.
 685
 686                 $plugin = isset($plugin['plugin']) ? $plugin['plugin'] : '';
 687                 if ( empty($plugin) )
 688                         return new WP_Error('bad_request', $this->strings['bad_request']);
 689
 690                 $plugins_dir = $wp_filesystem->wp_plugins_dir();
 691                 $this_plugin_dir = trailingslashit( dirname($plugins_dir . $plugin) );
 692
 693                 if ( ! $wp_filesystem->exists($this_plugin_dir) ) //If it's already vanished.
 694                         return $removed;
 695
 696                 // If plugin is in its own directory, recursively delete the directory.
 697                 if ( strpos($plugin, '/') && $this_plugin_dir != $plugins_dir ) //base check on if plugin includes directory separator AND that it's not the root plugin folder
 698                         $deleted = $wp_filesystem->delete($this_plugin_dir, true);
 699                 else
 700                         $deleted = $wp_filesystem->delete($plugins_dir . $plugin);
 701
 702                 if ( ! $deleted )
 703                         return new WP_Error('remove_old_failed', $this->strings['remove_old_failed']);
 704
 705                 return true;
 706         }
 707 }
 708
 709 /**
 710  * Theme Upgrader class for WordPress Themes, It is designed to upgrade/install themes from a local zip, remote zip URL, or uploaded zip file.
 711  *
 712  * @package WordPress
 713  * @subpackage Upgrader
 714  * @since 2.8.0
 715  */
 716 class Theme_Upgrader extends WP_Upgrader {
 717
 718         var $result;
 719         var $bulk = false;
 720
 721         function upgrade_strings() {
 722                 $this->strings['up_to_date'] = __('The theme is at the latest version.');
 723                 $this->strings['no_package'] = __('Update package not available.');
 724                 $this->strings['downloading_package'] = __('Downloading update from <span class="code">%s</span>&#8230;');
 725                 $this->strings['unpack_package'] = __('Unpacking the update&#8230;');
 726                 $this->strings['remove_old'] = __('Removing the old version of the theme&#8230;');
 727                 $this->strings['remove_old_failed'] = __('Could not remove the old theme.');
 728                 $this->strings['process_failed'] = __('Theme update failed.');
 729                 $this->strings['process_success'] = __('Theme updated successfully.');
 730         }
 731
 732         function install_strings() {
 733                 $this->strings['no_package'] = __('Install package not available.');
 734                 $this->strings['downloading_package'] = __('Downloading install package from <span class="code">%s</span>&#8230;');
 735                 $this->strings['unpack_package'] = __('Unpacking the package&#8230;');
 736                 $this->strings['installing_package'] = __('Installing the theme&#8230;');
 737                 $this->strings['no_files'] = __('The theme contains no files.');
 738                 $this->strings['process_failed'] = __('Theme install failed.');
 739                 $this->strings['process_success'] = __('Theme installed successfully.');
 740                 /* translators: 1: theme name, 2: version */
 741                 $this->strings['process_success_specific'] = __('Successfully installed the theme <strong>%1$s %2$s</strong>.');
 742                 $this->strings['parent_theme_search'] = __('This theme requires a parent theme. Checking if it is installed&#8230;');
 743                 /* translators: 1: theme name, 2: version */
 744                 $this->strings['parent_theme_prepare_install'] = __('Preparing to install <strong>%1$s %2$s</strong>&#8230;');
 745                 /* translators: 1: theme name, 2: version */
 746                 $this->strings['parent_theme_currently_installed'] = __('The parent theme, <strong>%1$s %2$s</strong>, is currently installed.');
 747                 /* translators: 1: theme name, 2: version */
 748                 $this->strings['parent_theme_install_success'] = __('Successfully installed the parent theme, <strong>%1$s %2$s</strong>.');
 749                 $this->strings['parent_theme_not_found'] = __('<strong>The parent theme could not be found.</strong> You will need to install the parent theme, <strong>%s</strong>, before you can use this child theme.');
 750         }
 751
 752         function check_parent_theme_filter($install_result, $hook_extra, $child_result) {
 753                 // Check to see if we need to install a parent theme
 754                 $theme_info = $this->theme_info();
 755
 756                 if ( ! $theme_info->parent() )
 757                         return $install_result;
 758
 759                 $this->skin->feedback( 'parent_theme_search' );
 760
 761                 if ( ! $theme_info->parent()->errors() ) {
 762                         $this->skin->feedback( 'parent_theme_currently_installed', $theme_info->parent()->display('Name'), $theme_info->parent()->display('Version') );
 763                         // We already have the theme, fall through.
 764                         return $install_result;
 765                 }
 766
 767                 // We don't have the parent theme, lets install it
 768                 $api = themes_api('theme_information', array('slug' => $theme_info->get('Template'), 'fields' => array('sections' => false, 'tags' => false) ) ); //Save on a bit of bandwidth.
 769
 770                 if ( ! $api || is_wp_error($api) ) {
 771                         $this->skin->feedback( 'parent_theme_not_found', $theme_info->get('Template') );
 772                         // Don't show activate or preview actions after install
 773                         add_filter('install_theme_complete_actions', array($this, 'hide_activate_preview_actions') );
 774                         return $install_result;
 775                 }
 776
 777                 // Backup required data we're going to override:
 778                 $child_api = $this->skin->api;
 779                 $child_success_message = $this->strings['process_success'];
 780
 781                 // Override them
 782                 $this->skin->api = $api;
 783                 $this->strings['process_success_specific'] = $this->strings['parent_theme_install_success'];//, $api->name, $api->version);
 784
 785                 $this->skin->feedback('parent_theme_prepare_install', $api->name, $api->version);
 786
 787                 add_filter('install_theme_complete_actions', '__return_false', 999); // Don't show any actions after installing the theme.
 788
 789                 // Install the parent theme
 790                 $parent_result = $this->run( array(
 791                         'package' => $api->download_link,
 792                         'destination' => get_theme_root(),
 793                         'clear_destination' => false, //Do not overwrite files.
 794                         'clear_working' => true
 795                 ) );
 796
 797                 if ( is_wp_error($parent_result) )
 798                         add_filter('install_theme_complete_actions', array($this, 'hide_activate_preview_actions') );
 799
 800                 // Start cleaning up after the parents installation
 801                 remove_filter('install_theme_complete_actions', '__return_false', 999);
 802
 803                 // Reset child's result and data
 804                 $this->result = $child_result;
 805                 $this->skin->api = $child_api;
 806                 $this->strings['process_success'] = $child_success_message;
 807
 808                 return $install_result;
 809         }
 810
 811         function hide_activate_preview_actions($actions) {
 812                 unset($actions['activate'], $actions['preview']);
 813                 return $actions;
 814         }
 815
 816         function install( $package, $args = array() ) {
 817
 818                 $defaults = array(
 819                         'clear_update_cache' => true,
 820                 );
 821                 $parsed_args = wp_parse_args( $args, $defaults );
 822
 823                 $this->init();
 824                 $this->install_strings();
 825
 826                 add_filter('upgrader_source_selection', array($this, 'check_package') );
 827                 add_filter('upgrader_post_install', array($this, 'check_parent_theme_filter'), 10, 3);
 828
 829                 $this->run( array(
 830                         'package' => $package,
 831                         'destination' => get_theme_root(),
 832                         'clear_destination' => false, //Do not overwrite files.
 833                         'clear_working' => true,
 834                         'hook_extra' => array(
 835                                 'type' => 'theme',
 836                                 'action' => 'install',
 837                         ),
 838                 ) );
 839
 840                 remove_filter('upgrader_source_selection', array($this, 'check_package') );
 841                 remove_filter('upgrader_post_install', array($this, 'check_parent_theme_filter'));
 842
 843                 if ( ! $this->result || is_wp_error($this->result) )
 844                         return $this->result;
 845
 846                 // Refresh the Theme Update information
 847                 wp_clean_themes_cache( $parsed_args['clear_update_cache'] );
 848
 849                 return true;
 850         }
 851
 852         function upgrade( $theme, $args = array() ) {
 853
 854                 $defaults = array(
 855                         'clear_update_cache' => true,
 856                 );
 857                 $parsed_args = wp_parse_args( $args, $defaults );
 858
 859                 $this->init();
 860                 $this->upgrade_strings();
 861
 862                 // Is an update available?
 863                 $current = get_site_transient( 'update_themes' );
 864                 if ( !isset( $current->response[ $theme ] ) ) {
 865                         $this->skin->before();
 866                         $this->skin->set_result(false);
 867                         $this->skin->error('up_to_date');
 868                         $this->skin->after();
 869                         return false;
 870                 }
 871
 872                 $r = $current->response[ $theme ];
 873
 874                 add_filter('upgrader_pre_install', array($this, 'current_before'), 10, 2);
 875                 add_filter('upgrader_post_install', array($this, 'current_after'), 10, 2);
 876                 add_filter('upgrader_clear_destination', array($this, 'delete_old_theme'), 10, 4);
 877
 878                 $this->run( array(
 879                         'package' => $r['package'],
 880                         'destination' => get_theme_root( $theme ),
 881                         'clear_destination' => true,
 882                         'clear_working' => true,
 883                         'hook_extra' => array(
 884                                 'theme' => $theme,
 885                                 'type' => 'theme',
 886                                 'action' => 'update',
 887                         ),
 888                 ) );
 889
 890                 remove_filter('upgrader_pre_install', array($this, 'current_before'));
 891                 remove_filter('upgrader_post_install', array($this, 'current_after'));
 892                 remove_filter('upgrader_clear_destination', array($this, 'delete_old_theme'));
 893
 894                 if ( ! $this->result || is_wp_error($this->result) )
 895                         return $this->result;
 896
 897                 wp_clean_themes_cache( $parsed_args['clear_update_cache'] );
 898
 899                 return true;
 900         }
 901
 902         function bulk_upgrade( $themes, $args = array() ) {
 903
 904                 $defaults = array(
 905                         'clear_update_cache' => true,
 906                 );
 907                 $parsed_args = wp_parse_args( $args, $defaults );
 908
 909                 $this->init();
 910                 $this->bulk = true;
 911                 $this->upgrade_strings();
 912
 913                 $current = get_site_transient( 'update_themes' );
 914
 915                 add_filter('upgrader_pre_install', array($this, 'current_before'), 10, 2);
 916                 add_filter('upgrader_post_install', array($this, 'current_after'), 10, 2);
 917                 add_filter('upgrader_clear_destination', array($this, 'delete_old_theme'), 10, 4);
 918
 919                 $this->skin->header();
 920
 921                 // Connect to the Filesystem first.
 922                 $res = $this->fs_connect( array(WP_CONTENT_DIR) );
 923                 if ( ! $res ) {
 924                         $this->skin->footer();
 925                         return false;
 926                 }
 927
 928                 $this->skin->bulk_header();
 929
 930                 // Only start maintenance mode if:
 931                 // - running Multisite and there are one or more themes specified, OR
 932                 // - a theme with an update available is currently in use.
 933                 // @TODO: For multisite, maintenance mode should only kick in for individual sites if at all possible.
 934                 $maintenance = ( is_multisite() && ! empty( $themes ) );
 935                 foreach ( $themes as $theme )
 936                         $maintenance = $maintenance || $theme == get_stylesheet() || $theme == get_template();
 937                 if ( $maintenance )
 938                         $this->maintenance_mode(true);
 939
 940                 $results = array();
 941
 942                 $this->update_count = count($themes);
 943                 $this->update_current = 0;
 944                 foreach ( $themes as $theme ) {
 945                         $this->update_current++;
 946
 947                         $this->skin->theme_info = $this->theme_info($theme);
 948
 949                         if ( !isset( $current->response[ $theme ] ) ) {
 950                                 $this->skin->set_result(true);
 951                                 $this->skin->before();
 952                                 $this->skin->feedback('up_to_date');
 953                                 $this->skin->after();
 954                                 $results[$theme] = true;
 955                                 continue;
 956                         }
 957
 958                         // Get the URL to the zip file
 959                         $r = $current->response[ $theme ];
 960
 961                         $result = $this->run( array(
 962                                 'package' => $r['package'],
 963                                 'destination' => get_theme_root( $theme ),
 964                                 'clear_destination' => true,
 965                                 'clear_working' => true,
 966                                 'hook_extra' => array(
 967                                         'theme' => $theme
 968                                 ),
 969                         ) );
 970
 971                         $results[$theme] = $this->result;
 972
 973                         // Prevent credentials auth screen from displaying multiple times
 974                         if ( false === $result )
 975                                 break;
 976                 } //end foreach $plugins
 977
 978                 $this->maintenance_mode(false);
 979
 980                 do_action( 'upgrader_process_complete', $this, array(
 981                         'action' => 'update',
 982                         'type' => 'plugin',
 983                         'bulk' => true,
 984                         'themes' => $themes,
 985                 ) );
 986
 987                 $this->skin->bulk_footer();
 988
 989                 $this->skin->footer();
 990
 991                 // Cleanup our hooks, in case something else does a upgrade on this connection.
 992                 remove_filter('upgrader_pre_install', array($this, 'current_before'));
 993                 remove_filter('upgrader_post_install', array($this, 'current_after'));
 994                 remove_filter('upgrader_clear_destination', array($this, 'delete_old_theme'));
 995
 996                 // Refresh the Theme Update information
 997                 wp_clean_themes_cache( $parsed_args['clear_update_cache'] );
 998
 999                 return $results;
1000         }
1001
1002         function check_package($source) {
1003                 global $wp_filesystem;
1004
1005                 if ( is_wp_error($source) )
1006                         return $source;
1007
1008                 // Check the folder contains a valid theme
1009                 $working_directory = str_replace( $wp_filesystem->wp_content_dir(), trailingslashit(WP_CONTENT_DIR), $source);
1010                 if ( ! is_dir($working_directory) ) // Sanity check, if the above fails, lets not prevent installation.
1011                         return $source;
1012
1013                 // A proper archive should have a style.css file in the single subdirectory
1014                 if ( ! file_exists( $working_directory . 'style.css' ) )
1015                         return new WP_Error( 'incompatible_archive_theme_no_style', $this->strings['incompatible_archive'], __( 'The theme is missing the <code>style.css</code> stylesheet.' ) );
1016
1017                 $info = get_file_data( $working_directory . 'style.css', array( 'Name' => 'Theme Name', 'Template' => 'Template' ) );
1018
1019                 if ( empty( $info['Name'] ) )
1020                         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." ) );
1021
1022                 // If it's not a child theme, it must have at least an index.php to be legit.
1023                 if ( empty( $info['Template'] ) && ! file_exists( $working_directory . 'index.php' ) )
1024                         return new WP_Error( 'incompatible_archive_theme_no_index', $this->strings['incompatible_archive'], __( 'The theme is missing the <code>index.php</code> file.' ) );
1025
1026                 return $source;
1027         }
1028
1029         function current_before($return, $theme) {
1030
1031                 if ( is_wp_error($return) )
1032                         return $return;
1033
1034                 $theme = isset($theme['theme']) ? $theme['theme'] : '';
1035
1036                 if ( $theme != get_stylesheet() ) //If not current
1037                         return $return;
1038                 //Change to maintenance mode now.
1039                 if ( ! $this->bulk )
1040                         $this->maintenance_mode(true);
1041
1042                 return $return;
1043         }
1044
1045         function current_after($return, $theme) {
1046                 if ( is_wp_error($return) )
1047                         return $return;
1048
1049                 $theme = isset($theme['theme']) ? $theme['theme'] : '';
1050
1051                 if ( $theme != get_stylesheet() ) // If not current
1052                         return $return;
1053
1054                 // Ensure stylesheet name hasn't changed after the upgrade:
1055                 if ( $theme == get_stylesheet() && $theme != $this->result['destination_name'] ) {
1056                         wp_clean_themes_cache();
1057                         $stylesheet = $this->result['destination_name'];
1058                         switch_theme( $stylesheet );
1059                 }
1060
1061                 //Time to remove maintenance mode
1062                 if ( ! $this->bulk )
1063                         $this->maintenance_mode(false);
1064                 return $return;
1065         }
1066
1067         function delete_old_theme( $removed, $local_destination, $remote_destination, $theme ) {
1068                 global $wp_filesystem;
1069
1070                 if ( is_wp_error( $removed ) )
1071                         return $removed; // Pass errors through.
1072
1073                 if ( ! isset( $theme['theme'] ) )
1074                         return $removed;
1075
1076                 $theme = $theme['theme'];
1077                 $themes_dir = trailingslashit( $wp_filesystem->wp_themes_dir( $theme ) );
1078                 if ( $wp_filesystem->exists( $themes_dir . $theme ) ) {
1079                         if ( ! $wp_filesystem->delete( $themes_dir . $theme, true ) )
1080                                 return false;
1081                 }
1082
1083                 return true;
1084         }
1085
1086         function theme_info($theme = null) {
1087
1088                 if ( empty($theme) ) {
1089                         if ( !empty($this->result['destination_name']) )
1090                                 $theme = $this->result['destination_name'];
1091                         else
1092                                 return false;
1093                 }
1094                 return wp_get_theme( $theme );
1095         }
1096
1097 }
1098
1099 add_action( 'upgrader_process_complete', array( 'Language_Pack_Upgrader', 'async_upgrade' ), 20 );
1100
1101 /**
1102  * Language pack upgrader, for updating translations of plugins, themes, and core.
1103  *
1104  * @package WordPress
1105  * @subpackage Upgrader
1106  * @since 3.7.0
1107  */
1108 class Language_Pack_Upgrader extends WP_Upgrader {
1109
1110         var $result;
1111         var $bulk = true;
1112
1113         static function async_upgrade( $upgrader = false ) {
1114                 // Avoid recursion.
1115                 if ( $upgrader && $upgrader instanceof Language_Pack_Upgrader )
1116                         return;
1117
1118                 // Nothing to do?
1119                 $language_updates = wp_get_translation_updates();
1120                 if ( ! $language_updates )
1121                         return;
1122
1123                 $skin = new Language_Pack_Upgrader_Skin( array(
1124                         'skip_header_footer' => true,
1125                 ) );
1126
1127                 $lp_upgrader = new Language_Pack_Upgrader( $skin );
1128                 $lp_upgrader->upgrade();
1129         }
1130
1131         function upgrade_strings() {
1132                 $this->strings['starting_upgrade'] = __( 'Some of your translations need updating. Sit tight for a few more seconds while we update them as well.' );
1133                 $this->strings['up_to_date'] = __( 'The translation is up to date.' ); // We need to silently skip this case
1134                 $this->strings['no_package'] = __( 'Update package not available.' );
1135                 $this->strings['downloading_package'] = __( 'Downloading translation from <span class="code">%s</span>&#8230;' );
1136                 $this->strings['unpack_package'] = __( 'Unpacking the update&#8230;' );
1137                 $this->strings['process_failed'] = __( 'Translation update failed.' );
1138                 $this->strings['process_success'] = __( 'Translation updated successfully.' );
1139         }
1140
1141         function upgrade( $update = false, $args = array() ) {
1142                 if ( $update )
1143                         $update = array( $update );
1144                 $results = $this->bulk_upgrade( $update, $args );
1145                 return $results[0];
1146         }
1147
1148         function bulk_upgrade( $language_updates = array(), $args = array() ) {
1149                 global $wp_filesystem;
1150
1151                 $defaults = array(
1152                         'clear_update_cache' => true,
1153                 );
1154                 $parsed_args = wp_parse_args( $args, $defaults );
1155
1156                 $this->init();
1157                 $this->upgrade_strings();
1158
1159                 if ( ! $language_updates )
1160                         $language_updates = wp_get_translation_updates();
1161
1162                 if ( empty( $language_updates ) ) {
1163                         $this->skin->header();
1164                         $this->skin->before();
1165                         $this->skin->set_result( true );
1166                         $this->skin->feedback( 'up_to_date' );
1167                         $this->skin->after();
1168                         $this->skin->bulk_footer();
1169                         $this->skin->footer();
1170                         return true;
1171                 }
1172
1173                 if ( 'upgrader_process_complete' == current_filter() )
1174                         $this->skin->feedback( 'starting_upgrade' );
1175
1176                 add_filter( 'upgrader_source_selection', array( &$this, 'check_package' ), 10, 3 );
1177
1178                 $this->skin->header();
1179
1180                 // Connect to the Filesystem first.
1181                 $res = $this->fs_connect( array( WP_CONTENT_DIR, WP_LANG_DIR ) );
1182                 if ( ! $res ) {
1183                         $this->skin->footer();
1184                         return false;
1185                 }
1186
1187                 $results = array();
1188
1189                 $this->update_count = count( $language_updates );
1190                 $this->update_current = 0;
1191
1192                 // The filesystem's mkdir() is not recursive. Make sure WP_LANG_DIR exists,
1193                 // as we then may need to create a /plugins or /themes directory inside of it.
1194                 $remote_destination = $wp_filesystem->find_folder( WP_LANG_DIR );
1195                 if ( ! $wp_filesystem->exists( $remote_destination ) )
1196                         if ( ! $wp_filesystem->mkdir( $remote_destination, FS_CHMOD_DIR ) )
1197                                 return new WP_Error( 'mkdir_failed_lang_dir', $this->strings['mkdir_failed'], $remote_destination );
1198
1199                 foreach ( $language_updates as $language_update ) {
1200
1201                         $this->skin->language_update = $language_update;
1202
1203                         $destination = WP_LANG_DIR;
1204                         if ( 'plugin' == $language_update->type )
1205                                 $destination .= '/plugins';
1206                         elseif ( 'theme' == $language_update->type )
1207                                 $destination .= '/themes';
1208
1209                         $this->update_current++;
1210
1211                         $options = array(
1212                                 'package' => $language_update->package,
1213                                 'destination' => $destination,
1214                                 'clear_destination' => false,
1215                                 'abort_if_destination_exists' => false, // We expect the destination to exist.
1216                                 'clear_working' => true,
1217                                 'is_multi' => true,
1218                                 'hook_extra' => array(
1219                                         'language_update_type' => $language_update->type,
1220                                         'language_update' => $language_update,
1221                                 )
1222                         );
1223
1224                         $result = $this->run( $options );
1225
1226                         $results[] = $this->result;
1227
1228                         // Prevent credentials auth screen from displaying multiple times.
1229                         if ( false === $result )
1230                                 break;
1231                 }
1232
1233                 $this->skin->bulk_footer();
1234
1235                 $this->skin->footer();
1236
1237                 // Clean up our hooks, in case something else does an upgrade on this connection.
1238                 remove_filter( 'upgrader_source_selection', array( &$this, 'check_package' ), 10, 2 );
1239
1240                 if ( $parsed_args['clear_update_cache'] ) {
1241                         wp_clean_themes_cache( true );
1242                         wp_clean_plugins_cache( true );
1243                         delete_site_transient( 'update_core' );
1244                 }
1245
1246                 return $results;
1247         }
1248
1249         function check_package( $source, $remote_source ) {
1250                 global $wp_filesystem;
1251
1252                 if ( is_wp_error( $source ) )
1253                         return $source;
1254
1255                 // Check that the folder contains a valid language.
1256                 $files = $wp_filesystem->dirlist( $remote_source );
1257
1258                 // Check to see if a .po and .mo exist in the folder.
1259                 $po = $mo = false;
1260                 foreach ( (array) $files as $file => $filedata ) {
1261                         if ( '.po' == substr( $file, -3 ) )
1262                                 $po = true;
1263                         elseif ( '.mo' == substr( $file, -3 ) )
1264                                 $mo = true;
1265                 }
1266
1267                 if ( ! $mo || ! $po )
1268                         return new WP_Error( 'incompatible_archive_pomo', $this->strings['incompatible_archive'],
1269                                 __( 'The language pack is missing either the <code>.po</code> or <code>.mo</code> files.' ) );
1270
1271                 return $source;
1272         }
1273
1274         function get_name_for_update( $update ) {
1275                 switch ( $update->type ) {
1276                         case 'core':
1277                                 return 'WordPress'; // Not translated
1278                                 break;
1279                         case 'theme':
1280                                 $theme = wp_get_theme( $update->slug );
1281                                 if ( $theme->exists() )
1282                                         return $theme->Get( 'Name' );
1283                                 break;
1284                         case 'plugin':
1285                                 $plugin_data = get_plugins( '/' . $update->slug );
1286                                 $plugin_data = array_shift( $plugin_data );
1287                                 if ( $plugin_data )
1288                                         return $plugin_data['Name'];
1289                                 break;
1290                 }
1291                 return '';
1292         }
1293
1294 }
1295
1296 /**
1297  * Core Upgrader class for WordPress. It allows for WordPress to upgrade itself in combination with the wp-admin/includes/update-core.php file
1298  *
1299  * @package WordPress
1300  * @subpackage Upgrader
1301  * @since 2.8.0
1302  */
1303 class Core_Upgrader extends WP_Upgrader {
1304
1305         function upgrade_strings() {
1306                 $this->strings['up_to_date'] = __('WordPress is at the latest version.');
1307                 $this->strings['no_package'] = __('Update package not available.');
1308                 $this->strings['downloading_package'] = __('Downloading update from <span class="code">%s</span>&#8230;');
1309                 $this->strings['unpack_package'] = __('Unpacking the update&#8230;');
1310                 $this->strings['copy_failed'] = __('Could not copy files.');
1311                 $this->strings['copy_failed_space'] = __('Could not copy files. You may have run out of disk space.' );
1312                 $this->strings['start_rollback'] = __( 'Attempting to roll back to previous version.' );
1313                 $this->strings['rollback_was_required'] = __( 'Due to an error during updating, WordPress has rolled back to your previous version.' );
1314         }
1315
1316         function upgrade( $current, $args = array() ) {
1317                 global $wp_filesystem, $wp_version;
1318
1319                 $start_time = time();
1320
1321                 $defaults = array(
1322                         'pre_check_md5'    => true,
1323                         'attempt_rollback' => false,
1324                         'do_rollback'      => false,
1325                 );
1326                 $parsed_args = wp_parse_args( $args, $defaults );
1327
1328                 $this->init();
1329                 $this->upgrade_strings();
1330
1331                 // Is an update available?
1332                 if ( !isset( $current->response ) || $current->response == 'latest' )
1333                         return new WP_Error('up_to_date', $this->strings['up_to_date']);
1334
1335                 $res = $this->fs_connect( array(ABSPATH, WP_CONTENT_DIR) );
1336                 if ( is_wp_error($res) )
1337                         return $res;
1338
1339                 $wp_dir = trailingslashit($wp_filesystem->abspath());
1340
1341                 $partial = true;
1342                 if ( $parsed_args['do_rollback'] )
1343                         $partial = false;
1344                 elseif ( $parsed_args['pre_check_md5'] && ! $this->check_files() )
1345                         $partial = false;
1346
1347                 // If partial update is returned from the API, use that, unless we're doing a reinstall.
1348                 // If we cross the new_bundled version number, then use the new_bundled zip.
1349                 // Don't though if the constant is set to skip bundled items.
1350                 // If the API returns a no_content zip, go with it. Finally, default to the full zip.
1351                 if ( $parsed_args['do_rollback'] && $current->packages->rollback )
1352                         $to_download = 'rollback';
1353                 elseif ( $current->packages->partial && 'reinstall' != $current->response && $wp_version == $current->partial_version && $partial )
1354                         $to_download = 'partial';
1355                 elseif ( $current->packages->new_bundled && version_compare( $wp_version, $current->new_bundled, '<' )
1356                         && ( ! defined( 'CORE_UPGRADE_SKIP_NEW_BUNDLED' ) || ! CORE_UPGRADE_SKIP_NEW_BUNDLED ) )
1357                         $to_download = 'new_bundled';
1358                 elseif ( $current->packages->no_content )
1359                         $to_download = 'no_content';
1360                 else
1361                         $to_download = 'full';
1362
1363                 $download = $this->download_package( $current->packages->$to_download );
1364                 if ( is_wp_error($download) )
1365                         return $download;
1366
1367                 $working_dir = $this->unpack_package( $download );
1368                 if ( is_wp_error($working_dir) )
1369                         return $working_dir;
1370
1371                 // Copy update-core.php from the new version into place.
1372                 if ( !$wp_filesystem->copy($working_dir . '/wordpress/wp-admin/includes/update-core.php', $wp_dir . 'wp-admin/includes/update-core.php', true) ) {
1373                         $wp_filesystem->delete($working_dir, true);
1374                         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' );
1375                 }
1376                 $wp_filesystem->chmod($wp_dir . 'wp-admin/includes/update-core.php', FS_CHMOD_FILE);
1377
1378                 require_once( ABSPATH . 'wp-admin/includes/update-core.php' );
1379
1380                 if ( ! function_exists( 'update_core' ) )
1381                         return new WP_Error( 'copy_failed_space', $this->strings['copy_failed_space'] );
1382
1383                 $result = update_core( $working_dir, $wp_dir );
1384
1385                 // In the event of an issue, we may be able to roll back.
1386                 if ( $parsed_args['attempt_rollback'] && $current->packages->rollback && ! $parsed_args['do_rollback'] ) {
1387                         $try_rollback = false;
1388                         if ( is_wp_error( $result ) ) {
1389                                 $error_code = $result->get_error_code();
1390                                 // Not all errors are equal. These codes are critical: copy_failed__copy_dir,
1391                                 // mkdir_failed__copy_dir, copy_failed__copy_dir_retry, and disk_full.
1392                                 // do_rollback allows for update_core() to trigger a rollback if needed.
1393                                 if ( false !== strpos( $error_code, 'do_rollback' ) )
1394                                         $try_rollback = true;
1395                                 elseif ( false !== strpos( $error_code, '__copy_dir' ) )
1396                                         $try_rollback = true;
1397                                 elseif ( 'disk_full' === $error_code )
1398                                         $try_rollback = true;
1399                         }
1400
1401                         if ( $try_rollback ) {
1402                                 apply_filters( 'update_feedback', $result );
1403                                 apply_filters( 'update_feedback', $this->strings['start_rollback'] );
1404
1405                                 $rollback_result = $this->upgrade( $current, array_merge( $parsed_args, array( 'do_rollback' => true ) ) );
1406
1407                                 $original_result = $result;
1408                                 $result = new WP_Error( 'rollback_was_required', $this->strings['rollback_was_required'], (object) array( 'update' => $original_result, 'rollback' => $rollback_result ) );
1409                         }
1410                 }
1411
1412                 do_action( 'upgrader_process_complete', $this, array( 'action' => 'update', 'type' => 'core' ) );
1413
1414                 // Clear the current updates
1415                 delete_site_transient( 'update_core' );
1416
1417                 if ( ! $parsed_args['do_rollback'] ) {
1418                         $stats = array(
1419                                 'update_type'      => $current->response,
1420                                 'success'          => true,
1421                                 'fs_method'        => $wp_filesystem->method,
1422                                 'fs_method_forced' => defined( 'FS_METHOD' ) || has_filter( 'filesystem_method' ),
1423                                 'time_taken'       => time() - $start_time,
1424                                 'attempted'        => $current->version,
1425                         );
1426
1427                         if ( is_wp_error( $result ) ) {
1428                                 $stats['success'] = false;
1429                                 // Did a rollback occur?
1430                                 if ( ! empty( $try_rollback ) ) {
1431                                         $stats['error_code'] = $original_result->get_error_code();
1432                                         $stats['error_data'] = $original_result->get_error_data();
1433                                         // Was the rollback successful? If not, collect its error too.
1434                                         $stats['rollback'] = ! is_wp_error( $rollback_result );
1435                                         if ( is_wp_error( $rollback_result ) ) {
1436                                                 $stats['rollback_code'] = $rollback_result->get_error_code();
1437                                                 $stats['rollback_data'] = $rollback_result->get_error_data();
1438                                         }
1439                                 } else {
1440                                         $stats['error_code'] = $result->get_error_code();
1441                                         $stats['error_data'] = $result->get_error_data();
1442                                 }
1443                         }
1444
1445                         wp_version_check( $stats );
1446                 }
1447
1448                 return $result;
1449         }
1450
1451         // Determines if this WordPress Core version should update to $offered_ver or not
1452         static function should_update_to_version( $offered_ver /* x.y.z */ ) {
1453                 include ABSPATH . WPINC . '/version.php'; // $wp_version; // x.y.z
1454
1455                 $current_branch = implode( '.', array_slice( preg_split( '/[.-]/', $wp_version  ), 0, 2 ) ); // x.y
1456                 $new_branch     = implode( '.', array_slice( preg_split( '/[.-]/', $offered_ver ), 0, 2 ) ); // x.y
1457                 $current_is_development_version = (bool) strpos( $wp_version, '-' );
1458
1459                 // Defaults:
1460                 $upgrade_dev   = true;
1461                 $upgrade_minor = true;
1462                 $upgrade_major = false;
1463
1464                 // WP_AUTO_UPDATE_CORE = true (all), 'minor', false.
1465                 if ( defined( 'WP_AUTO_UPDATE_CORE' ) ) {
1466                         if ( false === WP_AUTO_UPDATE_CORE ) {
1467                                 // Defaults to turned off, unless a filter allows it
1468                                 $upgrade_dev = $upgrade_minor = $upgrade_major = false;
1469                         } elseif ( true === WP_AUTO_UPDATE_CORE ) {
1470                                 // ALL updates for core
1471                                 $upgrade_dev = $upgrade_minor = $upgrade_major = true;
1472                         } elseif ( 'minor' === WP_AUTO_UPDATE_CORE ) {
1473                                 // Only minor updates for core
1474                                 $upgrade_dev = $upgrade_major = false;
1475                                 $upgrade_minor = true;
1476                         }
1477                 }
1478
1479                 // 1: If we're already on that version, not much point in updating?
1480                 if ( $offered_ver == $wp_version )
1481                         return false;
1482
1483                 // 2: If we're running a newer version, that's a nope
1484                 if ( version_compare( $wp_version, $offered_ver, '>' ) )
1485                         return false;
1486
1487                 $failure_data = get_site_option( 'auto_core_update_failed' );
1488                 if ( $failure_data ) {
1489                         // If this was a critical update failure, cannot update.
1490                         if ( ! empty( $failure_data['critical'] ) )
1491                                 return false;
1492
1493                         // Don't claim we can update on update-core.php if we have a non-critical failure logged.
1494                         if ( $wp_version == $failure_data['current'] && false !== strpos( $offered_ver, '.1.next.minor' ) )
1495                                 return false;
1496
1497                         // Cannot update if we're retrying the same A to B update that caused a non-critical failure.
1498                         // Some non-critical failures do allow retries, like download_failed.
1499                         // 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.
1500                         if ( empty( $failure_data['retry'] ) && $wp_version == $failure_data['current'] && $offered_ver == $failure_data['attempted'] )
1501                                 return false;
1502                 }
1503
1504                 // 3: 3.7-alpha-25000 -> 3.7-alpha-25678 -> 3.7-beta1 -> 3.7-beta2
1505                 if ( $current_is_development_version ) {
1506                         if ( ! apply_filters( 'allow_dev_auto_core_updates', $upgrade_dev ) )
1507                                 return false;
1508                         // else fall through to minor + major branches below
1509                 }
1510
1511                 // 4: Minor In-branch updates (3.7.0 -> 3.7.1 -> 3.7.2 -> 3.7.4)
1512                 if ( $current_branch == $new_branch )
1513                         return apply_filters( 'allow_minor_auto_core_updates', $upgrade_minor );
1514
1515                 // 5: Major version updates (3.7.0 -> 3.8.0 -> 3.9.1)
1516                 if ( version_compare( $new_branch, $current_branch, '>' ) )
1517                         return apply_filters( 'allow_major_auto_core_updates', $upgrade_major );
1518
1519                 // If we're not sure, we don't want it
1520                 return false;
1521         }
1522
1523         function check_files() {
1524                 global $wp_version, $wp_local_package;
1525
1526                 $checksums = get_core_checksums( $wp_version, isset( $wp_local_package ) ? $wp_local_package : 'en_US' );
1527
1528                 if ( ! is_array( $checksums ) )
1529                         return false;
1530
1531                 foreach ( $checksums as $file => $checksum ) {
1532                         // Skip files which get updated
1533                         if ( 'wp-content' == substr( $file, 0, 10 ) )
1534                                 continue;
1535                         if ( ! file_exists( ABSPATH . $file ) || md5_file( ABSPATH . $file ) !== $checksum )
1536                                 return false;
1537                 }
1538
1539                 return true;
1540         }
1541 }
1542
1543 /**
1544  * 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.
1545  *
1546  * @package WordPress
1547  * @subpackage Upgrader
1548  * @since 2.8.0
1549  */
1550 class File_Upload_Upgrader {
1551         var $package;
1552         var $filename;
1553         var $id = 0;
1554
1555         function __construct($form, $urlholder) {
1556
1557                 if ( empty($_FILES[$form]['name']) && empty($_GET[$urlholder]) )
1558                         wp_die(__('Please select a file'));
1559
1560                 //Handle a newly uploaded file, Else assume it's already been uploaded
1561                 if ( ! empty($_FILES) ) {
1562                         $overrides = array( 'test_form' => false, 'test_type' => false );
1563                         $file = wp_handle_upload( $_FILES[$form], $overrides );
1564
1565                         if ( isset( $file['error'] ) )
1566                                 wp_die( $file['error'] );
1567
1568                         $this->filename = $_FILES[$form]['name'];
1569                         $this->package = $file['file'];
1570
1571                         // Construct the object array
1572                         $object = array(
1573                                 'post_title' => $this->filename,
1574                                 'post_content' => $file['url'],
1575                                 'post_mime_type' => $file['type'],
1576                                 'guid' => $file['url'],
1577                                 'context' => 'upgrader',
1578                                 'post_status' => 'private'
1579                         );
1580
1581                         // Save the data
1582                         $this->id = wp_insert_attachment( $object, $file['file'] );
1583
1584                         // schedule a cleanup for 2 hours from now in case of failed install
1585                         wp_schedule_single_event( time() + 7200, 'upgrader_scheduled_cleanup', array( $this->id ) );
1586
1587                 } elseif ( is_numeric( $_GET[$urlholder] ) ) {
1588                         // Numeric Package = previously uploaded file, see above.
1589                         $this->id = (int) $_GET[$urlholder];
1590                         $attachment = get_post( $this->id );
1591                         if ( empty($attachment) )
1592                                 wp_die(__('Please select a file'));
1593
1594                         $this->filename = $attachment->post_title;
1595                         $this->package = get_attached_file( $attachment->ID );
1596                 } else {
1597                         // Else, It's set to something, Back compat for plugins using the old (pre-3.3) File_Uploader handler.
1598                         if ( ! ( ( $uploads = wp_upload_dir() ) && false === $uploads['error'] ) )
1599                                 wp_die( $uploads['error'] );
1600
1601                         $this->filename = $_GET[$urlholder];
1602                         $this->package = $uploads['basedir'] . '/' . $this->filename;
1603                 }
1604         }
1605
1606         function cleanup() {
1607                 if ( $this->id )
1608                         wp_delete_attachment( $this->id );
1609
1610                 elseif ( file_exists( $this->package ) )
1611                         return @unlink( $this->package );
1612
1613                 return true;
1614         }
1615 }
1616
1617 /**
1618  * The WordPress automatic background updater.
1619  *
1620  * @package WordPress
1621  * @subpackage Upgrader
1622  * @since 3.7.0
1623  */
1624 class WP_Automatic_Updater {
1625
1626         /**
1627          * Tracks update results during processing.
1628          *
1629          * @var array
1630          */
1631         protected $update_results = array();
1632
1633         /**
1634          * Whether the entire automatic updater is disabled.
1635          *
1636          * @since 3.7.0
1637          */
1638         public function is_disabled() {
1639                 // Background updates are disabled if you don't want file changes.
1640                 if ( defined( 'DISALLOW_FILE_MODS' ) && DISALLOW_FILE_MODS )
1641                         return true;
1642
1643                 if ( defined( 'WP_INSTALLING' ) )
1644                         return true;
1645
1646                 // More fine grained control can be done through the WP_AUTO_UPDATE_CORE constant and filters.
1647                 $disabled = defined( 'AUTOMATIC_UPDATER_DISABLED' ) && AUTOMATIC_UPDATER_DISABLED;
1648
1649                 /**
1650                  * Filter whether to entirely disable background updates.
1651                  *
1652                  * There are more fine-grained filters and controls for selective disabling.
1653                  * This filter parallels the AUTOMATIC_UPDATER_DISABLED constant in name.
1654                  *
1655                  * This also disables update notification emails. That may change in the future.
1656                  *
1657                  * @since 3.7.0
1658                  * @param bool $disabled Whether the updater should be disabled.
1659                  */
1660                 return apply_filters( 'automatic_updater_disabled', $disabled );
1661         }
1662
1663         /**
1664          * Check for version control checkouts.
1665          *
1666          * Checks for Subversion, Git, Mercurial, and Bazaar. It recursively looks up the
1667          * filesystem to the top of the drive, erring on the side of detecting a VCS
1668          * checkout somewhere.
1669          *
1670          * ABSPATH is always checked in addition to whatever $context is (which may be the
1671          * wp-content directory, for example). The underlying assumption is that if you are
1672          * using version control *anywhere*, then you should be making decisions for
1673          * how things get updated.
1674          *
1675          * @since 3.7.0
1676          *
1677          * @param string $context The filesystem path to check, in addition to ABSPATH.
1678          */
1679         public function is_vcs_checkout( $context ) {
1680                 $context_dirs = array( untrailingslashit( $context ) );
1681                 if ( $context !== ABSPATH )
1682                         $context_dirs[] = untrailingslashit( ABSPATH );
1683
1684                 $vcs_dirs = array( '.svn', '.git', '.hg', '.bzr' );
1685                 $check_dirs = array();
1686
1687                 foreach ( $context_dirs as $context_dir ) {
1688                         // Walk up from $context_dir to the root.
1689                         do {
1690                                 $check_dirs[] = $context_dir;
1691
1692                                 // Once we've hit '/' or 'C:\', we need to stop. dirname will keep returning the input here.
1693                                 if ( $context_dir == dirname( $context_dir ) )
1694                                         break;
1695
1696                         // Continue one level at a time.
1697                         } while ( $context_dir = dirname( $context_dir ) );
1698                 }
1699
1700                 $check_dirs = array_unique( $check_dirs );
1701
1702                 // Search all directories we've found for evidence of version control.
1703                 foreach ( $vcs_dirs as $vcs_dir ) {
1704                         foreach ( $check_dirs as $check_dir ) {
1705                                 if ( $checkout = @is_dir( rtrim( $check_dir, '\\/' ) . "/$vcs_dir" ) )
1706                                         break 2;
1707                         }
1708                 }
1709
1710                 /**
1711                  * Filter whether the automatic updater should consider a filesystem location to be potentially
1712                  * managed by a version control system.
1713                  *
1714                  * @since 3.7.0
1715                  *
1716                  * @param bool $checkout  Whether a VCS checkout was discovered at $context or ABSPATH, or anywhere higher.
1717                  * @param string $context The filesystem context (a path) against which filesystem status should be checked.
1718                  */
1719                 return apply_filters( 'automatic_updates_is_vcs_checkout', $checkout, $context );
1720         }
1721
1722         /**
1723          * Tests to see if we can and should update a specific item.
1724          *
1725          * @since 3.7.0
1726          *
1727          * @param string $type    The type of update being checked: 'core', 'theme', 'plugin', 'translation'.
1728          * @param object $item    The update offer.
1729          * @param string $context The filesystem context (a path) against which filesystem access and status
1730          *                        should be checked.
1731          */
1732         public function should_update( $type, $item, $context ) {
1733                 // Used to see if WP_Filesystem is set up to allow unattended updates.
1734                 $skin = new Automatic_Upgrader_Skin;
1735
1736                 if ( $this->is_disabled() )
1737                         return false;
1738
1739                 // If we can't do an auto core update, we may still be able to email the user.
1740                 if ( ! $skin->request_filesystem_credentials( false, $context ) || $this->is_vcs_checkout( $context ) ) {
1741                         if ( 'core' == $type )
1742                                 $this->send_core_update_notification_email( $item );
1743                         return false;
1744                 }
1745
1746                 // Next up, is this an item we can update?
1747                 if ( 'core' == $type )
1748                         $update = Core_Upgrader::should_update_to_version( $item->current );
1749                 else
1750                         $update = ! empty( $item->autoupdate );
1751
1752                 /**
1753                  * Filter whether to automatically update core, a plugin, a theme, or a language.
1754                  *
1755                  * The dynamic portion of the hook name, $type, refers to the type of update
1756                  * being checked. Can be 'core', 'theme', 'plugin', or 'translation'.
1757                  *
1758                  * Generally speaking, plugins, themes, and major core versions are not updated by default,
1759                  * while translations and minor and development versions for core are updated by default.
1760                  *
1761                  * See the filters allow_dev_auto_core_updates, allow_minor_auto_core_updates, and
1762                  * allow_major_auto_core_updates more straightforward filters to adjust core updates.
1763                  *
1764                  * @since 3.7.0
1765                  *
1766                  * @param bool   $update Whether to update.
1767                  * @param object $item   The update offer.
1768                  */
1769                 $update = apply_filters( 'auto_update_' . $type, $update, $item );
1770
1771                 if ( ! $update ) {
1772                         if ( 'core' == $type )
1773                                 $this->send_core_update_notification_email( $item );
1774                         return false;
1775                 }
1776
1777                 // If it's a core update, are we actually compatible with its requirements?
1778                 if ( 'core' == $type ) {
1779                         global $wpdb;
1780
1781                         $php_compat = version_compare( phpversion(), $item->php_version, '>=' );
1782                         if ( file_exists( WP_CONTENT_DIR . '/db.php' ) && empty( $wpdb->is_mysql ) )
1783                                 $mysql_compat = true;
1784                         else
1785                                 $mysql_compat = version_compare( $wpdb->db_version(), $item->mysql_version, '>=' );
1786
1787                         if ( ! $php_compat || ! $mysql_compat )
1788                                 return false;
1789                 }
1790
1791                 return true;
1792         }
1793
1794         /**
1795          * Notifies an administrator of a core update.
1796          *
1797          * @since 3.7.0
1798          *
1799          * @param object $item The update offer.
1800          */
1801         protected function send_core_update_notification_email( $item ) {
1802                 $notify   = true;
1803                 $notified = get_site_option( 'auto_core_update_notified' );
1804
1805                 // Don't notify if we've already notified the same email address of the same version.
1806                 if ( $notified && $notified['email'] == get_site_option( 'admin_email' ) && $notified['version'] == $item->current )
1807                         return false;
1808
1809                 // See if we need to notify users of a core update.
1810                 $notify = ! empty( $item->notify_email );
1811
1812                 /**
1813                  * Whether to notify the site administrator of a new core update.
1814                  *
1815                  * By default, administrators are notified when the update offer received from WordPress.org
1816                  * sets a particular flag. This allows for discretion in if and when to notify.
1817                  *
1818                  * This filter only fires once per release -- if the same email address was already
1819                  * notified of the same new version, we won't repeatedly email the administrator.
1820                  *
1821                  * This filter is also used on about.php to check if a plugin has disabled these notifications.
1822                  *
1823                  * @since 3.7.0
1824                  *
1825                  * @param bool $notify Whether the site administrator is notified.
1826                  * @param object $item The update offer.
1827                  */
1828                 if ( ! apply_filters( 'send_core_update_notification_email', $notify, $item ) )
1829                         return false;
1830
1831                 $this->send_email( 'manual', $item );
1832                 return true;
1833         }
1834
1835         /**
1836          * Update an item, if appropriate.
1837          *
1838          * @since 3.7.0
1839          *
1840          * @param string $type The type of update being checked: 'core', 'theme', 'plugin', 'translation'.
1841          * @param object $item The update offer.
1842          */
1843         public function update( $type, $item ) {
1844                 $skin = new Automatic_Upgrader_Skin;
1845
1846                 switch ( $type ) {
1847                         case 'core':
1848                                 // The Core upgrader doesn't use the Upgrader's skin during the actual main part of the upgrade, instead, firing a filter.
1849                                 add_filter( 'update_feedback', array( $skin, 'feedback' ) );
1850                                 $upgrader = new Core_Upgrader( $skin );
1851                                 $context  = ABSPATH;
1852                                 break;
1853                         case 'plugin':
1854                                 $upgrader = new Plugin_Upgrader( $skin );
1855                                 $context  = WP_PLUGIN_DIR; // We don't support custom Plugin directories, or updates for WPMU_PLUGIN_DIR
1856                                 break;
1857                         case 'theme':
1858                                 $upgrader = new Theme_Upgrader( $skin );
1859                                 $context  = get_theme_root( $item );
1860                                 break;
1861                         case 'translation':
1862                                 $upgrader = new Language_Pack_Upgrader( $skin );
1863                                 $context  = WP_CONTENT_DIR; // WP_LANG_DIR;
1864                                 break;
1865                 }
1866
1867                 // Determine whether we can and should perform this update.
1868                 if ( ! $this->should_update( $type, $item, $context ) )
1869                         return false;
1870
1871                 switch ( $type ) {
1872                         case 'core':
1873                                 $skin->feedback( __( 'Updating to WordPress %s' ), $item->version );
1874                                 $item_name = sprintf( __( 'WordPress %s' ), $item->version );
1875                                 break;
1876                         case 'theme':
1877                                 $theme = wp_get_theme( $item );
1878                                 $item_name = $theme->Get( 'Name' );
1879                                 $skin->feedback( __( 'Updating theme: %s' ), $item_name );
1880                                 break;
1881                         case 'plugin':
1882                                 $plugin_data = get_plugin_data( $context . '/' . $item );
1883                                 $item_name = $plugin_data['Name'];
1884                                 $skin->feedback( __( 'Updating plugin: %s' ), $item_name );
1885                                 break;
1886                         case 'translation':
1887                                 $language_item_name = $upgrader->get_name_for_update( $item );
1888                                 $item_name = sprintf( __( 'Translations for %s' ), $language_item_name );
1889                                 $skin->feedback( sprintf( __( 'Updating translations for %1$s (%2$s)&#8230;' ), $language_item_name, $item->language ) );
1890                                 break;
1891                 }
1892
1893                 // Boom, This sites about to get a whole new splash of paint!
1894                 $upgrade_result = $upgrader->upgrade( $item, array(
1895                         'clear_update_cache' => false,
1896                         'pre_check_md5'      => false, /* always use partial builds if possible for core updates */
1897                         'attempt_rollback'   => true, /* only available for core updates */
1898                 ) );
1899
1900                 // Core doesn't output this, so lets append it so we don't get confused
1901                 if ( 'core' == $type ) {
1902                         if ( is_wp_error( $upgrade_result ) ) {
1903                                 $skin->error( __( 'Installation Failed' ), $upgrade_result );
1904                         } else {
1905                                 $skin->feedback( __( 'WordPress updated successfully' ) );
1906                         }
1907                 }
1908
1909                 $this->update_results[ $type ][] = (object) array(
1910                         'item'     => $item,
1911                         'result'   => $upgrade_result,
1912                         'name'     => $item_name,
1913                         'messages' => $skin->get_upgrade_messages()
1914                 );
1915
1916                 return $upgrade_result;
1917         }
1918
1919         /**
1920          * Kicks off the background update process, looping through all pending updates.
1921          *
1922          * @since 3.7.0
1923          */
1924         public function run() {
1925                 global $wpdb, $wp_version;
1926
1927                 if ( $this->is_disabled() )
1928                         return;
1929
1930                 if ( ! is_main_network() || ! is_main_site() )
1931                         return;
1932
1933                 $lock_name = 'auto_updater.lock';
1934
1935                 // Try to lock
1936                 $lock_result = $wpdb->query( $wpdb->prepare( "INSERT IGNORE INTO `$wpdb->options` ( `option_name`, `option_value`, `autoload` ) VALUES (%s, %s, 'no') /* LOCK */", $lock_name, time() ) );
1937
1938                 if ( ! $lock_result ) {
1939                         $lock_result = get_option( $lock_name );
1940
1941                         // If we couldn't create a lock, and there isn't a lock, bail
1942                         if ( ! $lock_result )
1943                                 return;
1944
1945                         // Check to see if the lock is still valid
1946                         if ( $lock_result > ( time() - HOUR_IN_SECONDS ) )
1947                                 return;
1948                 }
1949
1950                 // Update the lock, as by this point we've definately got a lock, just need to fire the actions
1951                 update_option( $lock_name, time() );
1952
1953                 // Don't automatically run these thins, as we'll handle it ourselves
1954                 remove_action( 'upgrader_process_complete', array( 'Language_Pack_Upgrader', 'async_upgrade' ), 20 );
1955                 remove_action( 'upgrader_process_complete', 'wp_version_check' );
1956                 remove_action( 'upgrader_process_complete', 'wp_update_plugins' );
1957                 remove_action( 'upgrader_process_complete', 'wp_update_themes' );
1958
1959                 // Next, Plugins
1960                 wp_update_plugins(); // Check for Plugin updates
1961                 $plugin_updates = get_site_transient( 'update_plugins' );
1962                 if ( $plugin_updates && !empty( $plugin_updates->response ) ) {
1963                         foreach ( array_keys( $plugin_updates->response ) as $plugin ) {
1964                                 $this->update( 'plugin', $plugin );
1965                         }
1966                         // Force refresh of plugin update information
1967                         wp_clean_plugins_cache();
1968                 }
1969
1970                 // Next, those themes we all love
1971                 wp_update_themes();  // Check for Theme updates
1972                 $theme_updates = get_site_transient( 'update_themes' );
1973                 if ( $theme_updates && !empty( $theme_updates->response ) ) {
1974                         foreach ( array_keys( $theme_updates->response ) as $theme ) {
1975                                 $this->update( 'theme', $theme );
1976                         }
1977                         // Force refresh of theme update information
1978                         wp_clean_themes_cache();
1979                 }
1980
1981                 // Next, Process any core update
1982                 wp_version_check(); // Check for Core updates
1983                 $core_update = find_core_auto_update();
1984
1985                 if ( $core_update )
1986                         $this->update( 'core', $core_update );
1987
1988                 // Clean up, and check for any pending translations
1989                 // (Core_Upgrader checks for core updates)
1990                 wp_update_themes();  // Check for Theme updates
1991                 wp_update_plugins(); // Check for Plugin updates
1992
1993                 // Finally, Process any new translations
1994                 $language_updates = wp_get_translation_updates();
1995                 if ( $language_updates ) {
1996                         foreach ( $language_updates as $update ) {
1997                                 $this->update( 'translation', $update );
1998                         }
1999
2000                         // Clear existing caches
2001                         wp_clean_plugins_cache();
2002                         wp_clean_themes_cache();
2003                         delete_site_transient( 'update_core' );
2004
2005                         wp_version_check();  // check for Core updates
2006                         wp_update_themes();  // Check for Theme updates
2007                         wp_update_plugins(); // Check for Plugin updates
2008                 }
2009
2010                 // Send debugging email to all development installs.
2011                 if ( ! empty( $this->update_results ) ) {
2012                         $development_version = false !== strpos( $wp_version, '-' );
2013                         /**
2014                          * Filter whether to send a debugging email for each automatic background update.
2015                          *
2016                          * @since 3.7.0
2017                          * @param bool $development_version By default, emails are sent if the install is a development version.
2018                          *                                  Return false to avoid the email.
2019                          */
2020                         if ( apply_filters( 'automatic_updates_send_debug_email', $development_version ) )
2021                                 $this->send_debug_email();
2022
2023                         if ( ! empty( $this->update_results['core'] ) )
2024                                 $this->after_core_update( $this->update_results['core'][0] );
2025                 }
2026
2027                 // Clear the lock
2028                 delete_option( $lock_name );
2029         }
2030
2031         /**
2032          * If we tried to perform a core update, check if we should send an email,
2033          * and if we need to avoid processing future updates.
2034          *
2035          * @param object $update_result The result of the core update. Includes the update offer and result.
2036          */
2037         protected function after_core_update( $update_result ) {
2038                 global $wp_version;
2039
2040                 $core_update = $update_result->item;
2041                 $result      = $update_result->result;
2042
2043                 if ( ! is_wp_error( $result ) ) {
2044                         $this->send_email( 'success', $core_update );
2045                         return;
2046                 }
2047
2048                 $error_code = $result->get_error_code();
2049
2050                 // Any of these WP_Error codes are critical failures, as in they occurred after we started to copy core files.
2051                 // We should not try to perform a background update again until there is a successful one-click update performed by the user.
2052                 $critical = false;
2053                 if ( $error_code === 'disk_full' || false !== strpos( $error_code, '__copy_dir' ) ) {
2054                         $critical = true;
2055                 } elseif ( $error_code === 'rollback_was_required' && is_wp_error( $result->get_error_data()->rollback ) ) {
2056                         // A rollback is only critical if it failed too.
2057                         $critical = true;
2058                         $rollback_result = $result->get_error_data()->rollback;
2059                 } elseif ( false !== strpos( $error_code, 'do_rollback' ) ) {
2060                         $critical = true;
2061                 }
2062
2063                 if ( $critical ) {
2064                         $critical_data = array(
2065                                 'attempted'  => $core_update->current,
2066                                 'current'    => $wp_version,
2067                                 'error_code' => $error_code,
2068                                 'error_data' => $result->get_error_data(),
2069                                 'timestamp'  => time(),
2070                                 'critical'   => true,
2071                         );
2072                         if ( isset( $rollback_result ) ) {
2073                                 $critical_data['rollback_code'] = $rollback_result->get_error_code();
2074                                 $critical_data['rollback_data'] = $rollback_result->get_error_data();
2075                         }
2076                         update_site_option( 'auto_core_update_failed', $critical_data );
2077                         $this->send_email( 'critical', $core_update, $result );
2078                         return;
2079                 }
2080
2081                 /*
2082                  * Any other WP_Error code (like download_failed or files_not_writable) occurs before
2083                  * we tried to copy over core files. Thus, the failures are early and graceful.
2084                  *
2085                  * We should avoid trying to perform a background update again for the same version.
2086                  * But we can try again if another version is released.
2087                  *
2088                  * For certain 'transient' failures, like download_failed, we should allow retries.
2089                  * In fact, let's schedule a special update for an hour from now. (It's possible
2090                  * the issue could actually be on WordPress.org's side.) If that one fails, then email.
2091                  */
2092                 $send = true;
2093                 $transient_failures = array( 'incompatible_archive', 'download_failed', 'insane_distro' );
2094                 if ( in_array( $error_code, $transient_failures ) && ! get_site_option( 'auto_core_update_failed' ) ) {
2095                         wp_schedule_single_event( time() + HOUR_IN_SECONDS, 'wp_maybe_auto_update' );
2096                         $send = false;
2097                 }
2098
2099                 $n = get_site_option( 'auto_core_update_notified' );
2100                 // Don't notify if we've already notified the same email address of the same version of the same notification type.
2101                 if ( $n && 'fail' == $n['type'] && $n['email'] == get_site_option( 'admin_email' ) && $n['version'] == $core_update->current )
2102                         $send = false;
2103
2104                 update_site_option( 'auto_core_update_failed', array(
2105                         'attempted'  => $core_update->current,
2106                         'current'    => $wp_version,
2107                         'error_code' => $error_code,
2108                         'error_data' => $result->get_error_data(),
2109                         'timestamp'  => time(),
2110                         'retry'      => in_array( $error_code, $transient_failures ),
2111                 ) );
2112
2113                 if ( $send )
2114                         $this->send_email( 'fail', $core_update, $result );
2115         }
2116
2117         /**
2118          * Sends an email upon the completion or failure of a background core update.
2119          *
2120          * @since 3.7.0
2121          *
2122          * @param string $type        The type of email to send. Can be one of 'success', 'fail', 'manual', 'critical'.
2123          * @param object $core_update The update offer that was attempted.
2124          * @param mixed  $result      Optional. The result for the core update. Can be WP_Error.
2125          */
2126         protected function send_email( $type, $core_update, $result = null ) {
2127                 update_site_option( 'auto_core_update_notified', array(
2128                         'type'      => $type,
2129                         'email'     => get_site_option( 'admin_email' ),
2130                         'version'   => $core_update->current,
2131                         'timestamp' => time(),
2132                 ) );
2133
2134                 $next_user_core_update = get_preferred_from_update_core();
2135                 // If the update transient is empty, use the update we just performed
2136                 if ( ! $next_user_core_update )
2137                         $next_user_core_update = $core_update;
2138                 $newer_version_available = ( 'upgrade' == $next_user_core_update->response && version_compare( $next_user_core_update->version, $core_update->version, '>' ) );
2139
2140                 /**
2141                  * Filter whether to send an email following an automatic background core update.
2142                  *
2143                  * @since 3.7.0
2144                  *
2145                  * @param bool   $send        Whether to send the email. Default true.
2146                  * @param string $type        The type of email to send. Can be one of 'success', 'fail', 'critical'.
2147                  * @param object $core_update The update offer that was attempted.
2148                  * @param mixed  $result      The result for the core update. Can be WP_Error.
2149                  */
2150                 if ( 'manual' !== $type && ! apply_filters( 'auto_core_update_send_email', true, $type, $core_update, $result ) )
2151                         return;
2152
2153                 switch ( $type ) {
2154                         case 'success' : // We updated.
2155                                 /* translators: 1: Site name, 2: WordPress version number. */
2156                                 $subject = __( '[%1$s] Your site has updated to WordPress %2$s' );
2157                                 break;
2158
2159                         case 'fail' :   // We tried to update but couldn't.
2160                         case 'manual' : // We can't update (and made no attempt).
2161                                 /* translators: 1: Site name, 2: WordPress version number. */
2162                                 $subject = __( '[%1$s] WordPress %2$s is available. Please update!' );
2163                                 break;
2164
2165                         case 'critical' : // We tried to update, started to copy files, then things went wrong.
2166                                 /* translators: 1: Site name. */
2167                                 $subject = __( '[%1$s] URGENT: Your site may be down due to a failed update' );
2168                                 break;
2169
2170                         default :
2171                                 return;
2172                 }
2173
2174                 // If the auto update is not to the latest version, say that the current version of WP is available instead.
2175                 $version = 'success' === $type ? $core_update->current : $next_user_core_update->current;
2176                 $subject = sprintf( $subject, wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES ), $version );
2177
2178                 $body = '';
2179
2180                 switch ( $type ) {
2181                         case 'success' :
2182                                 $body .= sprintf( __( 'Howdy! Your site at %1$s has been updated automatically to WordPress %2$s.' ), home_url(), $core_update->current );
2183                                 $body .= "\n\n";
2184                                 if ( ! $newer_version_available )
2185                                         $body .= __( 'No further action is needed on your part.' ) . ' ';
2186
2187                                 // Can only reference the About screen if their update was successful.
2188                                 list( $about_version ) = explode( '-', $core_update->current, 2 );
2189                                 $body .= sprintf( __( "For more on version %s, see the About WordPress screen:" ), $about_version );
2190                                 $body .= "\n" . admin_url( 'about.php' );
2191
2192                                 if ( $newer_version_available ) {
2193                                         $body .= "\n\n" . sprintf( __( 'WordPress %s is also now available.' ), $next_user_core_update->current ) . ' ';
2194                                         $body .= __( 'Updating is easy and only takes a few moments:' );
2195                                         $body .= "\n" . network_admin_url( 'update-core.php' );
2196                                 }
2197
2198                                 break;
2199
2200                         case 'fail' :
2201                         case 'manual' :
2202                                 $body .= sprintf( __( 'Please update your site at %1$s to WordPress %2$s.' ), home_url(), $next_user_core_update->current );
2203
2204                                 $body .= "\n\n";
2205
2206                                 // Don't show this message if there is a newer version available.
2207                                 // Potential for confusion, and also not useful for them to know at this point.
2208                                 if ( 'fail' == $type && ! $newer_version_available )
2209                                         $body .= __( 'We tried but were unable to update your site automatically.' ) . ' ';
2210
2211                                 $body .= __( 'Updating is easy and only takes a few moments:' );
2212                                 $body .= "\n" . network_admin_url( 'update-core.php' );
2213                                 break;
2214
2215                         case 'critical' :
2216                                 if ( $newer_version_available )
2217                                         $body .= sprintf( __( 'Your site at %1$s experienced a critical failure while trying to update WordPress to version %2$s.' ), home_url(), $core_update->current );
2218                                 else
2219                                         $body .= sprintf( __( 'Your site at %1$s experienced a critical failure while trying to update to the latest version of WordPress, %2$s.' ), home_url(), $core_update->current );
2220
2221                                 $body .= "\n\n" . __( "This means your site may be offline or broken. Don't panic; this can be fixed." );
2222
2223                                 $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:" );
2224                                 $body .= "\n" . network_admin_url( 'update-core.php' );
2225                                 break;
2226                 }
2227
2228                 // Updates are important!
2229                 if ( $type != 'success' || $newer_version_available )
2230                         $body .= "\n\n" . __( 'Keeping your site updated is important for security. It also makes the internet a safer place for you and your readers.' );
2231
2232                 // Add a note about the support forums to all emails.
2233                 $body .= "\n\n" . __( 'If you experience any issues or need support, the volunteers in the WordPress.org support forums may be able to help.' );
2234                 $body .= "\n" . __( 'http://wordpress.org/support/' );
2235
2236                 // If things are successful and we're now on the latest, mention plugins and themes if any are out of date.
2237                 if ( $type == 'success' && ! $newer_version_available && ( get_plugin_updates() || get_theme_updates() ) ) {
2238                         $body .= "\n\n" . __( 'You also have some plugins or themes with updates available. Update them now:' );
2239                         $body .= "\n" . network_admin_url();
2240                 }
2241
2242                 $body .= "\n\n" . __( 'The WordPress Team' ) . "\n";
2243
2244                 if ( 'critical' == $type && is_wp_error( $result ) ) {
2245                         $body .= "\n***\n\n";
2246                         $body .= sprintf( __( 'Your site was running version %s.' ), $GLOBALS['wp_version'] );
2247                         $body .= ' ' . __( 'We have some data that describes the error your site encountered.' );
2248                         $body .= ' ' . __( 'Your hosting company, support forum volunteers, or a friendly developer may be able to use this information to help you:' );
2249
2250                         // If we had a rollback and we're still critical, then the rollback failed too.
2251                         // Loop through all errors (the main WP_Error, the update result, the rollback result) for code, data, etc.
2252                         if ( 'rollback_was_required' == $result->get_error_code() )
2253                                 $errors = array( $result, $result->get_error_data()->update, $result->get_error_data()->rollback );
2254                         else
2255                                 $errors = array( $result );
2256
2257                         foreach ( $errors as $error ) {
2258                                 if ( ! is_wp_error( $error ) )
2259                                         continue;
2260                                 $error_code = $error->get_error_code();
2261                                 $body .= "\n\n" . sprintf( __( "Error code: %s" ), $error_code );
2262                                 if ( 'rollback_was_required' == $error_code )
2263                                         continue;
2264                                 if ( $error->get_error_message() )
2265                                         $body .= "\n" . $error->get_error_message();
2266                                 $error_data = $error->get_error_data();
2267                                 if ( $error_data )
2268                                         $body .= "\n" . implode( ', ', (array) $error_data );
2269                         }
2270                         $body .= "\n";
2271                 }
2272
2273                 $to  = get_site_option( 'admin_email' );
2274                 $headers = '';
2275
2276                 $email = compact( 'to', 'subject', 'body', 'headers' );
2277                 /**
2278                  * Filter the email sent following an automatic background core update.
2279                  *
2280                  * @since 3.7.0
2281                  *
2282                  * @param array $email {
2283                  *     Array of email arguments that will be passed to wp_mail().
2284                  *
2285                  *     @type string $to      The email recipient. An array of emails can be returned, as handled by wp_mail().
2286                  *     @type string $subject The email's subject.
2287                  *     @type string $body    The email message body.
2288                  *     @type string $headers Any email headers, defaults to no headers.
2289                  * }
2290                  * @param string $type        The type of email being sent. Can be one of 'success', 'fail', 'manual', 'critical'.
2291                  * @param object $core_update The update offer that was attempted.
2292                  * @param mixed  $result      The result for the core update. Can be WP_Error.
2293                  */
2294                 $email = apply_filters( 'auto_core_update_email', $email, $type, $core_update, $result );
2295
2296                 wp_mail( $email['to'], $email['subject'], $email['body'], $email['headers'] );
2297         }
2298
2299         /**
2300          * Prepares and sends an email of a full log of background update results, useful for debugging and geekery.
2301          *
2302          * @since 3.7.0
2303          */
2304         protected function send_debug_email() {
2305                 $update_count = 0;
2306                 foreach ( $this->update_results as $type => $updates )
2307                         $update_count += count( $updates );
2308
2309                 $body = array();
2310                 $failures = 0;
2311
2312                 $body[] = 'WordPress site: ' . network_home_url( '/' );
2313
2314                 // Core
2315                 if ( isset( $this->update_results['core'] ) ) {
2316                         $result = $this->update_results['core'][0];
2317                         if ( $result->result && ! is_wp_error( $result->result ) ) {
2318                                 $body[] = sprintf( 'SUCCESS: WordPress was successfully updated to %s', $result->name );
2319                         } else {
2320                                 $body[] = sprintf( 'FAILED: WordPress failed to update to %s', $result->name );
2321                                 $failures++;
2322                         }
2323                         $body[] = '';
2324                 }
2325
2326                 // Plugins, Themes, Translations
2327                 foreach ( array( 'plugin', 'theme', 'translation' ) as $type ) {
2328                         if ( ! isset( $this->update_results[ $type ] ) )
2329                                 continue;
2330                         $success_items = wp_list_filter( $this->update_results[ $type ], array( 'result' => true ) );
2331                         if ( $success_items ) {
2332                                 $body[] = "The following {$type}s were successfully updated:";
2333                                 foreach ( wp_list_pluck( $success_items, 'name' ) as $name )
2334                                         $body[] = ' * SUCCESS: ' . $name;
2335                         }
2336                         if ( $success_items != $this->update_results[ $type ] ) {
2337                                 // Failed updates
2338                                 $body[] = "The following {$type}s failed to update:";
2339                                 foreach ( $this->update_results[ $type ] as $item ) {
2340                                         if ( ! $item->result || is_wp_error( $item->result ) ) {
2341                                                 $body[] = ' * FAILED: ' . $item->name;
2342                                                 $failures++;
2343                                         }
2344                                 }
2345                         }
2346                         $body[] = '';
2347                 }
2348
2349                 if ( $failures ) {
2350                         $body[] = '';
2351                         $body[] = 'BETA TESTING?';
2352                         $body[] = '=============';
2353                         $body[] = '';
2354                         $body[] = 'This debugging email is sent when you are using a development version of WordPress.';
2355                         $body[] = '';
2356                         $body[] = 'If you think these failures might be due to a bug in WordPress, could you report it?';
2357                         $body[] = ' * Open a thread in the support forums: http://wordpress.org/support/forum/alphabeta';
2358                         $body[] = " * Or, if you're comfortable writing a bug report: http://core.trac.wordpress.org/";
2359                         $body[] = '';
2360                         $body[] = 'Thanks! -- The WordPress Team';
2361                         $body[] = '';
2362                         $subject = sprintf( '[%s] There were failures during background updates', get_bloginfo( 'name' ) );
2363                 } else {
2364                         $subject = sprintf( '[%s] Background updates have finished', get_bloginfo( 'name' ) );
2365                 }
2366
2367                 $body[] = 'UPDATE LOG';
2368                 $body[] = '==========';
2369                 $body[] = '';
2370
2371                 foreach ( array( 'core', 'plugin', 'theme', 'translation' ) as $type ) {
2372                         if ( ! isset( $this->update_results[ $type ] ) )
2373                                 continue;
2374                         foreach ( $this->update_results[ $type ] as $update ) {
2375                                 $body[] = $update->name;
2376                                 $body[] = str_repeat( '-', strlen( $update->name ) );
2377                                 foreach ( $update->messages as $message )
2378                                         $body[] = "  " . html_entity_decode( str_replace( '&#8230;', '...', $message ) );
2379                                 if ( is_wp_error( $update->result ) ) {
2380                                         $results = array( 'update' => $update->result );
2381                                         // If we rolled back, we want to know an error that occurred then too.
2382                                         if ( 'rollback_was_required' === $update->result->get_error_code() )
2383                                                 $results = (array) $update->result->get_error_data();
2384                                         foreach ( $results as $result_type => $result ) {
2385                                                 if ( ! is_wp_error( $result ) )
2386                                                         continue;
2387                                                 $body[] = '  ' . ( 'rollback' === $result_type ? 'Rollback ' : '' ) . 'Error: [' . $result->get_error_code() . '] ' . $result->get_error_message();
2388                                                 if ( $result->get_error_data() )
2389                                                         $body[] = '         ' . implode( ', ', (array) $result->get_error_data() );
2390                                         }
2391                                 }
2392                                 $body[] = '';
2393                         }
2394                 }
2395
2396                 //echo "<h1>\n$subject\n</h1>\n";
2397                 //echo "<pre>\n" . implode( "\n", $body ) . "\n</pre>";
2398
2399                 wp_mail( get_site_option( 'admin_email' ), $subject, implode( "\n", $body ) );
2400         }
2401 }