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/wp-includes/ -> update.php (source)

   1  <?php
   2  /**
   3   * A simple set of functions to check our version 1.0 update service.
   4   *
   5   * @package WordPress
   6   * @since 2.3.0
   7   */
   8  
   9  /**
  10   * Check WordPress version against the newest version.
  11   *
  12   * The WordPress version, PHP version, and locale is sent.
  13   *
  14   * Checks against the WordPress server at api.wordpress.org. Will only check
  15   * if WordPress isn't installing.
  16   *
  17   * @since 2.3.0
  18   *
  19   * @global string $wp_version       Used to check against the newest WordPress version.
  20   * @global wpdb   $wpdb             WordPress database abstraction object.
  21   * @global string $wp_local_package Locale code of the package.
  22   *
  23   * @param array $extra_stats Extra statistics to report to the WordPress.org API.
  24   * @param bool  $force_check Whether to bypass the transient cache and force a fresh update check. Defaults to false, true if $extra_stats is set.
  25   */
  26  function wp_version_check( $extra_stats = array(), $force_check = false ) {
  27      global $wpdb, $wp_local_package;
  28  
  29      if ( wp_installing() ) {
  30          return;
  31      }
  32  
  33      // Include an unmodified $wp_version.
  34      require  ABSPATH . WPINC . '/version.php';
  35      $php_version = phpversion();
  36  
  37      $current      = get_site_transient( 'update_core' );
  38      $translations = wp_get_installed_translations( 'core' );
  39  
  40      // Invalidate the transient when $wp_version changes.
  41      if ( is_object( $current ) && $wp_version !== $current->version_checked ) {
  42          $current = false;
  43      }
  44  
  45      if ( ! is_object( $current ) ) {
  46          $current                  = new stdClass;
  47          $current->updates         = array();
  48          $current->version_checked = $wp_version;
  49      }
  50  
  51      if ( ! empty( $extra_stats ) ) {
  52          $force_check = true;
  53      }
  54  
  55      // Wait 1 minute between multiple version check requests.
  56      $timeout          = MINUTE_IN_SECONDS;
  57      $time_not_changed = isset( $current->last_checked ) && $timeout > ( time() - $current->last_checked );
  58  
  59      if ( ! $force_check && $time_not_changed ) {
  60          return;
  61      }
  62  
  63      /**
  64       * Filters the locale requested for WordPress core translations.
  65       *
  66       * @since 2.8.0
  67       *
  68       * @param string $locale Current locale.
  69       */
  70      $locale = apply_filters( 'core_version_check_locale', get_locale() );
  71  
  72      // Update last_checked for current to prevent multiple blocking requests if request hangs.
  73      $current->last_checked = time();
  74      set_site_transient( 'update_core', $current );
  75  
  76      if ( method_exists( $wpdb, 'db_version' ) ) {
  77          $mysql_version = preg_replace( '/[^0-9.].*/', '', $wpdb->db_version() );
  78      } else {
  79          $mysql_version = 'N/A';
  80      }
  81  
  82      if ( is_multisite() ) {
  83          $user_count        = get_user_count();
  84          $num_blogs         = get_blog_count();
  85          $wp_install        = network_site_url();
  86          $multisite_enabled = 1;
  87      } else {
  88          $user_count        = count_users();
  89          $user_count        = $user_count['total_users'];
  90          $multisite_enabled = 0;
  91          $num_blogs         = 1;
  92          $wp_install        = home_url( '/' );
  93      }
  94  
  95      $query = array(
  96          'version'            => $wp_version,
  97          'php'                => $php_version,
  98          'locale'             => $locale,
  99          'mysql'              => $mysql_version,
 100          'local_package'      => isset( $wp_local_package ) ? $wp_local_package : '',
 101          'blogs'              => $num_blogs,
 102          'users'              => $user_count,
 103          'multisite_enabled'  => $multisite_enabled,
 104          'initial_db_version' => get_site_option( 'initial_db_version' ),
 105      );
 106  
 107      /**
 108       * Filters the query arguments sent as part of the core version check.
 109       *
 110       * WARNING: Changing this data may result in your site not receiving security updates.
 111       * Please exercise extreme caution.
 112       *
 113       * @since 4.9.0
 114       *
 115       * @param array $query {
 116       *     Version check query arguments.
 117       *
 118       *     @type string $version            WordPress version number.
 119       *     @type string $php                PHP version number.
 120       *     @type string $locale             The locale to retrieve updates for.
 121       *     @type string $mysql              MySQL version number.
 122       *     @type string $local_package      The value of the $wp_local_package global, when set.
 123       *     @type int    $blogs              Number of sites on this WordPress installation.
 124       *     @type int    $users              Number of users on this WordPress installation.
 125       *     @type int    $multisite_enabled  Whether this WordPress installation uses Multisite.
 126       *     @type int    $initial_db_version Database version of WordPress at time of installation.
 127       * }
 128       */
 129      $query = apply_filters( 'core_version_check_query_args', $query );
 130  
 131      $post_body = array(
 132          'translations' => wp_json_encode( $translations ),
 133      );
 134  
 135      if ( is_array( $extra_stats ) ) {
 136          $post_body = array_merge( $post_body, $extra_stats );
 137      }
 138  
 139      // Allow for WP_AUTO_UPDATE_CORE to specify beta/RC/development releases.
 140      if ( defined( 'WP_AUTO_UPDATE_CORE' )
 141          && in_array( WP_AUTO_UPDATE_CORE, array( 'beta', 'rc', 'development', 'branch-development' ), true )
 142      ) {
 143          $query['channel'] = WP_AUTO_UPDATE_CORE;
 144      }
 145  
 146      $url      = 'http://api.wordpress.org/core/version-check/1.7/?' . http_build_query( $query, null, '&' );
 147      $http_url = $url;
 148      $ssl      = wp_http_supports( array( 'ssl' ) );
 149  
 150      if ( $ssl ) {
 151          $url = set_url_scheme( $url, 'https' );
 152      }
 153  
 154      $doing_cron = wp_doing_cron();
 155  
 156      $options = array(
 157          'timeout'    => $doing_cron ? 30 : 3,
 158          'user-agent' => 'WordPress/' . $wp_version . '; ' . home_url( '/' ),
 159          'headers'    => array(
 160              'wp_install' => $wp_install,
 161              'wp_blog'    => home_url( '/' ),
 162          ),
 163          'body'       => $post_body,
 164      );
 165  
 166      $response = wp_remote_post( $url, $options );
 167  
 168      if ( $ssl && is_wp_error( $response ) ) {
 169          trigger_error(
 170              sprintf(
 171                  /* translators: %s: Support forums URL. */
 172                  __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="%s">support forums</a>.' ),
 173                  __( 'https://wordpress.org/support/forums/' )
 174              ) . ' ' . __( '(WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.)' ),
 175              headers_sent() || WP_DEBUG ? E_USER_WARNING : E_USER_NOTICE
 176          );
 177          $response = wp_remote_post( $http_url, $options );
 178      }
 179  
 180      if ( is_wp_error( $response ) || 200 !== wp_remote_retrieve_response_code( $response ) ) {
 181          return;
 182      }
 183  
 184      $body = trim( wp_remote_retrieve_body( $response ) );
 185      $body = json_decode( $body, true );
 186  
 187      if ( ! is_array( $body ) || ! isset( $body['offers'] ) ) {
 188          return;
 189      }
 190  
 191      $offers = $body['offers'];
 192  
 193      foreach ( $offers as &$offer ) {
 194          foreach ( $offer as $offer_key => $value ) {
 195              if ( 'packages' === $offer_key ) {
 196                  $offer['packages'] = (object) array_intersect_key(
 197                      array_map( 'esc_url', $offer['packages'] ),
 198                      array_fill_keys( array( 'full', 'no_content', 'new_bundled', 'partial', 'rollback' ), '' )
 199                  );
 200              } elseif ( 'download' === $offer_key ) {
 201                  $offer['download'] = esc_url( $value );
 202              } else {
 203                  $offer[ $offer_key ] = esc_html( $value );
 204              }
 205          }
 206          $offer = (object) array_intersect_key(
 207              $offer,
 208              array_fill_keys(
 209                  array(
 210                      'response',
 211                      'download',
 212                      'locale',
 213                      'packages',
 214                      'current',
 215                      'version',
 216                      'php_version',
 217                      'mysql_version',
 218                      'new_bundled',
 219                      'partial_version',
 220                      'notify_email',
 221                      'support_email',
 222                      'new_files',
 223                  ),
 224                  ''
 225              )
 226          );
 227      }
 228  
 229      $updates                  = new stdClass();
 230      $updates->updates         = $offers;
 231      $updates->last_checked    = time();
 232      $updates->version_checked = $wp_version;
 233  
 234      if ( isset( $body['translations'] ) ) {
 235          $updates->translations = $body['translations'];
 236      }
 237  
 238      set_site_transient( 'update_core', $updates );
 239  
 240      if ( ! empty( $body['ttl'] ) ) {
 241          $ttl = (int) $body['ttl'];
 242  
 243          if ( $ttl && ( time() + $ttl < wp_next_scheduled( 'wp_version_check' ) ) ) {
 244              // Queue an event to re-run the update check in $ttl seconds.
 245              wp_schedule_single_event( time() + $ttl, 'wp_version_check' );
 246          }
 247      }
 248  
 249      // Trigger background updates if running non-interactively, and we weren't called from the update handler.
 250      if ( $doing_cron && ! doing_action( 'wp_maybe_auto_update' ) ) {
 251          /**
 252           * Fires during wp_cron, starting the auto-update process.
 253           *
 254           * @since 3.9.0
 255           */
 256          do_action( 'wp_maybe_auto_update' );
 257      }
 258  }
 259  
 260  /**
 261   * Checks for available updates to plugins based on the latest versions hosted on WordPress.org.
 262   *
 263   * Despite its name this function does not actually perform any updates, it only checks for available updates.
 264   *
 265   * A list of all plugins installed is sent to WP, along with the site locale.
 266   *
 267   * Checks against the WordPress server at api.wordpress.org. Will only check
 268   * if WordPress isn't installing.
 269   *
 270   * @since 2.3.0
 271   *
 272   * @global string $wp_version The WordPress version string.
 273   *
 274   * @param array $extra_stats Extra statistics to report to the WordPress.org API.
 275   */
 276  function wp_update_plugins( $extra_stats = array() ) {
 277      if ( wp_installing() ) {
 278          return;
 279      }
 280  
 281      // Include an unmodified $wp_version.
 282      require  ABSPATH . WPINC . '/version.php';
 283  
 284      // If running blog-side, bail unless we've not checked in the last 12 hours.
 285      if ( ! function_exists( 'get_plugins' ) ) {
 286          require_once ABSPATH . 'wp-admin/includes/plugin.php';
 287      }
 288  
 289      $plugins      = get_plugins();
 290      $translations = wp_get_installed_translations( 'plugins' );
 291  
 292      $active  = get_option( 'active_plugins', array() );
 293      $current = get_site_transient( 'update_plugins' );
 294  
 295      if ( ! is_object( $current ) ) {
 296          $current = new stdClass;
 297      }
 298  
 299      $updates               = new stdClass;
 300      $updates->last_checked = time();
 301      $updates->response     = array();
 302      $updates->translations = array();
 303      $updates->no_update    = array();
 304  
 305      $doing_cron = wp_doing_cron();
 306  
 307      // Check for update on a different schedule, depending on the page.
 308      switch ( current_filter() ) {
 309          case 'upgrader_process_complete':
 310              $timeout = 0;
 311              break;
 312          case 'load-update-core.php':
 313              $timeout = MINUTE_IN_SECONDS;
 314              break;
 315          case 'load-plugins.php':
 316          case 'load-update.php':
 317              $timeout = HOUR_IN_SECONDS;
 318              break;
 319          default:
 320              if ( $doing_cron ) {
 321                  $timeout = 2 * HOUR_IN_SECONDS;
 322              } else {
 323                  $timeout = 12 * HOUR_IN_SECONDS;
 324              }
 325      }
 326  
 327      $time_not_changed = isset( $current->last_checked ) && $timeout > ( time() - $current->last_checked );
 328  
 329      if ( $time_not_changed && ! $extra_stats ) {
 330          $plugin_changed = false;
 331  
 332          foreach ( $plugins as $file => $p ) {
 333              $updates->checked[ $file ] = $p['Version'];
 334  
 335              if ( ! isset( $current->checked[ $file ] ) || (string) $current->checked[ $file ] !== (string) $p['Version'] ) {
 336                  $plugin_changed = true;
 337              }
 338          }
 339  
 340          if ( isset( $current->response ) && is_array( $current->response ) ) {
 341              foreach ( $current->response as $plugin_file => $update_details ) {
 342                  if ( ! isset( $plugins[ $plugin_file ] ) ) {
 343                      $plugin_changed = true;
 344                      break;
 345                  }
 346              }
 347          }
 348  
 349          // Bail if we've checked recently and if nothing has changed.
 350          if ( ! $plugin_changed ) {
 351              return;
 352          }
 353      }
 354  
 355      // Update last_checked for current to prevent multiple blocking requests if request hangs.
 356      $current->last_checked = time();
 357      set_site_transient( 'update_plugins', $current );
 358  
 359      $to_send = compact( 'plugins', 'active' );
 360  
 361      $locales = array_values( get_available_languages() );
 362  
 363      /**
 364       * Filters the locales requested for plugin translations.
 365       *
 366       * @since 3.7.0
 367       * @since 4.5.0 The default value of the `$locales` parameter changed to include all locales.
 368       *
 369       * @param array $locales Plugin locales. Default is all available locales of the site.
 370       */
 371      $locales = apply_filters( 'plugins_update_check_locales', $locales );
 372      $locales = array_unique( $locales );
 373  
 374      if ( $doing_cron ) {
 375          $timeout = 30;
 376      } else {
 377          // Three seconds, plus one extra second for every 10 plugins.
 378          $timeout = 3 + (int) ( count( $plugins ) / 10 );
 379      }
 380  
 381      $options = array(
 382          'timeout'    => $timeout,
 383          'body'       => array(
 384              'plugins'      => wp_json_encode( $to_send ),
 385              'translations' => wp_json_encode( $translations ),
 386              'locale'       => wp_json_encode( $locales ),
 387              'all'          => wp_json_encode( true ),
 388          ),
 389          'user-agent' => 'WordPress/' . $wp_version . '; ' . home_url( '/' ),
 390      );
 391  
 392      if ( $extra_stats ) {
 393          $options['body']['update_stats'] = wp_json_encode( $extra_stats );
 394      }
 395  
 396      $url      = 'http://api.wordpress.org/plugins/update-check/1.1/';
 397      $http_url = $url;
 398      $ssl      = wp_http_supports( array( 'ssl' ) );
 399  
 400      if ( $ssl ) {
 401          $url = set_url_scheme( $url, 'https' );
 402      }
 403  
 404      $raw_response = wp_remote_post( $url, $options );
 405  
 406      if ( $ssl && is_wp_error( $raw_response ) ) {
 407          trigger_error(
 408              sprintf(
 409                  /* translators: %s: Support forums URL. */
 410                  __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="%s">support forums</a>.' ),
 411                  __( 'https://wordpress.org/support/forums/' )
 412              ) . ' ' . __( '(WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.)' ),
 413              headers_sent() || WP_DEBUG ? E_USER_WARNING : E_USER_NOTICE
 414          );
 415          $raw_response = wp_remote_post( $http_url, $options );
 416      }
 417  
 418      if ( is_wp_error( $raw_response ) || 200 !== wp_remote_retrieve_response_code( $raw_response ) ) {
 419          return;
 420      }
 421  
 422      $response = json_decode( wp_remote_retrieve_body( $raw_response ), true );
 423  
 424      if ( $response && is_array( $response ) ) {
 425          $updates->response     = $response['plugins'];
 426          $updates->translations = $response['translations'];
 427          $updates->no_update    = $response['no_update'];
 428      }
 429  
 430      // Support updates for any plugins using the `Update URI` header field.
 431      foreach ( $plugins as $plugin_file => $plugin_data ) {
 432          if ( ! $plugin_data['UpdateURI'] || isset( $updates->response[ $plugin_file ] ) ) {
 433              continue;
 434          }
 435  
 436          $hostname = wp_parse_url( esc_url_raw( $plugin_data['UpdateURI'] ), PHP_URL_HOST );
 437  
 438          /**
 439           * Filters the update response for a given plugin hostname.
 440           *
 441           * The dynamic portion of the hook name, `$hostname`, refers to the hostname
 442           * of the URI specified in the `Update URI` header field.
 443           *
 444           * @since 5.8.0
 445           *
 446           * @param array|false $update {
 447           *     The plugin update data with the latest details. Default false.
 448           *
 449           *     @type string $id           Optional. ID of the plugin for update purposes, should be a URI
 450           *                                specified in the `Update URI` header field.
 451           *     @type string $slug         Slug of the plugin.
 452           *     @type string $version      The version of the plugin.
 453           *     @type string $url          The URL for details of the plugin.
 454           *     @type string $package      Optional. The update ZIP for the plugin.
 455           *     @type string $tested       Optional. The version of WordPress the plugin is tested against.
 456           *     @type string $requires_php Optional. The version of PHP which the plugin requires.
 457           *     @type bool   $autoupdate   Optional. Whether the plugin should automatically update.
 458           *     @type array  $icons        Optional. Array of plugin icons.
 459           *     @type array  $banners      Optional. Array of plugin banners.
 460           *     @type array  $banners_rtl  Optional. Array of plugin RTL banners.
 461           *     @type array  $translations {
 462           *         Optional. List of translation updates for the plugin.
 463           *
 464           *         @type string $language   The language the translation update is for.
 465           *         @type string $version    The version of the plugin this translation is for.
 466           *                                  This is not the version of the language file.
 467           *         @type string $updated    The update timestamp of the translation file.
 468           *                                  Should be a date in the `YYYY-MM-DD HH:MM:SS` format.
 469           *         @type string $package    The ZIP location containing the translation update.
 470           *         @type string $autoupdate Whether the translation should be automatically installed.
 471           *     }
 472           * }
 473           * @param array       $plugin_data      Plugin headers.
 474           * @param string      $plugin_file      Plugin filename.
 475           * @param array       $locales          Installed locales to look translations for.
 476           */
 477          $update = apply_filters( "update_plugins_{$hostname}", false, $plugin_data, $plugin_file, $locales );
 478  
 479          if ( ! $update ) {
 480              continue;
 481          }
 482  
 483          $update = (object) $update;
 484  
 485          // Is it valid? We require at least a version.
 486          if ( ! isset( $update->version ) ) {
 487              continue;
 488          }
 489  
 490          // These should remain constant.
 491          $update->id     = $plugin_data['UpdateURI'];
 492          $update->plugin = $plugin_file;
 493  
 494          // WordPress needs the version field specified as 'new_version'.
 495          if ( ! isset( $update->new_version ) ) {
 496              $update->new_version = $update->version;
 497          }
 498  
 499          // Handle any translation updates.
 500          if ( ! empty( $update->translations ) ) {
 501              foreach ( $update->translations as $translation ) {
 502                  if ( isset( $translation['language'], $translation['package'] ) ) {
 503                      $translation['type'] = 'plugin';
 504                      $translation['slug'] = isset( $update->slug ) ? $update->slug : $update->id;
 505  
 506                      $updates->translations[] = $translation;
 507                  }
 508              }
 509          }
 510  
 511          unset( $updates->no_update[ $plugin_file ], $updates->response[ $plugin_file ] );
 512  
 513          if ( version_compare( $update->new_version, $plugin_data['Version'], '>' ) ) {
 514              $updates->response[ $plugin_file ] = $update;
 515          } else {
 516              $updates->no_update[ $plugin_file ] = $update;
 517          }
 518      }
 519  
 520      $sanitize_plugin_update_payload = static function( &$item ) {
 521          $item = (object) $item;
 522  
 523          unset( $item->translations, $item->compatibility );
 524  
 525          return $item;
 526      };
 527  
 528      array_walk( $updates->response, $sanitize_plugin_update_payload );
 529      array_walk( $updates->no_update, $sanitize_plugin_update_payload );
 530  
 531      set_site_transient( 'update_plugins', $updates );
 532  }
 533  
 534  /**
 535   * Checks for available updates to themes based on the latest versions hosted on WordPress.org.
 536   *
 537   * Despite its name this function does not actually perform any updates, it only checks for available updates.
 538   *
 539   * A list of all themes installed is sent to WP, along with the site locale.
 540   *
 541   * Checks against the WordPress server at api.wordpress.org. Will only check
 542   * if WordPress isn't installing.
 543   *
 544   * @since 2.7.0
 545   *
 546   * @global string $wp_version The WordPress version string.
 547   *
 548   * @param array $extra_stats Extra statistics to report to the WordPress.org API.
 549   */
 550  function wp_update_themes( $extra_stats = array() ) {
 551      if ( wp_installing() ) {
 552          return;
 553      }
 554  
 555      // Include an unmodified $wp_version.
 556      require  ABSPATH . WPINC . '/version.php';
 557  
 558      $installed_themes = wp_get_themes();
 559      $translations     = wp_get_installed_translations( 'themes' );
 560  
 561      $last_update = get_site_transient( 'update_themes' );
 562  
 563      if ( ! is_object( $last_update ) ) {
 564          $last_update = new stdClass;
 565      }
 566  
 567      $themes  = array();
 568      $checked = array();
 569      $request = array();
 570  
 571      // Put slug of current theme into request.
 572      $request['active'] = get_option( 'stylesheet' );
 573  
 574      foreach ( $installed_themes as $theme ) {
 575          $checked[ $theme->get_stylesheet() ] = $theme->get( 'Version' );
 576  
 577          $themes[ $theme->get_stylesheet() ] = array(
 578              'Name'       => $theme->get( 'Name' ),
 579              'Title'      => $theme->get( 'Name' ),
 580              'Version'    => $theme->get( 'Version' ),
 581              'Author'     => $theme->get( 'Author' ),
 582              'Author URI' => $theme->get( 'AuthorURI' ),
 583              'Template'   => $theme->get_template(),
 584              'Stylesheet' => $theme->get_stylesheet(),
 585          );
 586      }
 587  
 588      $doing_cron = wp_doing_cron();
 589  
 590      // Check for update on a different schedule, depending on the page.
 591      switch ( current_filter() ) {
 592          case 'upgrader_process_complete':
 593              $timeout = 0;
 594              break;
 595          case 'load-update-core.php':
 596              $timeout = MINUTE_IN_SECONDS;
 597              break;
 598          case 'load-themes.php':
 599          case 'load-update.php':
 600              $timeout = HOUR_IN_SECONDS;
 601              break;
 602          default:
 603              if ( $doing_cron ) {
 604                  $timeout = 2 * HOUR_IN_SECONDS;
 605              } else {
 606                  $timeout = 12 * HOUR_IN_SECONDS;
 607              }
 608      }
 609  
 610      $time_not_changed = isset( $last_update->last_checked ) && $timeout > ( time() - $last_update->last_checked );
 611  
 612      if ( $time_not_changed && ! $extra_stats ) {
 613          $theme_changed = false;
 614  
 615          foreach ( $checked as $slug => $v ) {
 616              if ( ! isset( $last_update->checked[ $slug ] ) || (string) $last_update->checked[ $slug ] !== (string) $v ) {
 617                  $theme_changed = true;
 618              }
 619          }
 620  
 621          if ( isset( $last_update->response ) && is_array( $last_update->response ) ) {
 622              foreach ( $last_update->response as $slug => $update_details ) {
 623                  if ( ! isset( $checked[ $slug ] ) ) {
 624                      $theme_changed = true;
 625                      break;
 626                  }
 627              }
 628          }
 629  
 630          // Bail if we've checked recently and if nothing has changed.
 631          if ( ! $theme_changed ) {
 632              return;
 633          }
 634      }
 635  
 636      // Update last_checked for current to prevent multiple blocking requests if request hangs.
 637      $last_update->last_checked = time();
 638      set_site_transient( 'update_themes', $last_update );
 639  
 640      $request['themes'] = $themes;
 641  
 642      $locales = array_values( get_available_languages() );
 643  
 644      /**
 645       * Filters the locales requested for theme translations.
 646       *
 647       * @since 3.7.0
 648       * @since 4.5.0 The default value of the `$locales` parameter changed to include all locales.
 649       *
 650       * @param array $locales Theme locales. Default is all available locales of the site.
 651       */
 652      $locales = apply_filters( 'themes_update_check_locales', $locales );
 653      $locales = array_unique( $locales );
 654  
 655      if ( $doing_cron ) {
 656          $timeout = 30;
 657      } else {
 658          // Three seconds, plus one extra second for every 10 themes.
 659          $timeout = 3 + (int) ( count( $themes ) / 10 );
 660      }
 661  
 662      $options = array(
 663          'timeout'    => $timeout,
 664          'body'       => array(
 665              'themes'       => wp_json_encode( $request ),
 666              'translations' => wp_json_encode( $translations ),
 667              'locale'       => wp_json_encode( $locales ),
 668          ),
 669          'user-agent' => 'WordPress/' . $wp_version . '; ' . home_url( '/' ),
 670      );
 671  
 672      if ( $extra_stats ) {
 673          $options['body']['update_stats'] = wp_json_encode( $extra_stats );
 674      }
 675  
 676      $url      = 'http://api.wordpress.org/themes/update-check/1.1/';
 677      $http_url = $url;
 678      $ssl      = wp_http_supports( array( 'ssl' ) );
 679  
 680      if ( $ssl ) {
 681          $url = set_url_scheme( $url, 'https' );
 682      }
 683  
 684      $raw_response = wp_remote_post( $url, $options );
 685  
 686      if ( $ssl && is_wp_error( $raw_response ) ) {
 687          trigger_error(
 688              sprintf(
 689                  /* translators: %s: Support forums URL. */
 690                  __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="%s">support forums</a>.' ),
 691                  __( 'https://wordpress.org/support/forums/' )
 692              ) . ' ' . __( '(WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.)' ),
 693              headers_sent() || WP_DEBUG ? E_USER_WARNING : E_USER_NOTICE
 694          );
 695          $raw_response = wp_remote_post( $http_url, $options );
 696      }
 697  
 698      if ( is_wp_error( $raw_response ) || 200 !== wp_remote_retrieve_response_code( $raw_response ) ) {
 699          return;
 700      }
 701  
 702      $new_update               = new stdClass;
 703      $new_update->last_checked = time();
 704      $new_update->checked      = $checked;
 705  
 706      $response = json_decode( wp_remote_retrieve_body( $raw_response ), true );
 707  
 708      if ( is_array( $response ) ) {
 709          $new_update->response     = $response['themes'];
 710          $new_update->no_update    = $response['no_update'];
 711          $new_update->translations = $response['translations'];
 712      }
 713  
 714      set_site_transient( 'update_themes', $new_update );
 715  }
 716  
 717  /**
 718   * Performs WordPress automatic background updates.
 719   *
 720   * Updates WordPress core plus any plugins and themes that have automatic updates enabled.
 721   *
 722   * @since 3.7.0
 723   */
 724  function wp_maybe_auto_update() {
 725      include_once  ABSPATH . 'wp-admin/includes/admin.php';
 726      require_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';
 727  
 728      $upgrader = new WP_Automatic_Updater;
 729      $upgrader->run();
 730  }
 731  
 732  /**
 733   * Retrieves a list of all language updates available.
 734   *
 735   * @since 3.7.0
 736   *
 737   * @return object[] Array of translation objects that have available updates.
 738   */
 739  function wp_get_translation_updates() {
 740      $updates    = array();
 741      $transients = array(
 742          'update_core'    => 'core',
 743          'update_plugins' => 'plugin',
 744          'update_themes'  => 'theme',
 745      );
 746  
 747      foreach ( $transients as $transient => $type ) {
 748          $transient = get_site_transient( $transient );
 749  
 750          if ( empty( $transient->translations ) ) {
 751              continue;
 752          }
 753  
 754          foreach ( $transient->translations as $translation ) {
 755              $updates[] = (object) $translation;
 756          }
 757      }
 758  
 759      return $updates;
 760  }
 761  
 762  /**
 763   * Collect counts and UI strings for available updates
 764   *
 765   * @since 3.3.0
 766   *
 767   * @return array
 768   */
 769  function wp_get_update_data() {
 770      $counts = array(
 771          'plugins'      => 0,
 772          'themes'       => 0,
 773          'wordpress'    => 0,
 774          'translations' => 0,
 775      );
 776  
 777      $plugins = current_user_can( 'update_plugins' );
 778  
 779      if ( $plugins ) {
 780          $update_plugins = get_site_transient( 'update_plugins' );
 781  
 782          if ( ! empty( $update_plugins->response ) ) {
 783              $counts['plugins'] = count( $update_plugins->response );
 784          }
 785      }
 786  
 787      $themes = current_user_can( 'update_themes' );
 788  
 789      if ( $themes ) {
 790          $update_themes = get_site_transient( 'update_themes' );
 791  
 792          if ( ! empty( $update_themes->response ) ) {
 793              $counts['themes'] = count( $update_themes->response );
 794          }
 795      }
 796  
 797      $core = current_user_can( 'update_core' );
 798  
 799      if ( $core && function_exists( 'get_core_updates' ) ) {
 800          $update_wordpress = get_core_updates( array( 'dismissed' => false ) );
 801  
 802          if ( ! empty( $update_wordpress )
 803              && ! in_array( $update_wordpress[0]->response, array( 'development', 'latest' ), true )
 804              && current_user_can( 'update_core' )
 805          ) {
 806              $counts['wordpress'] = 1;
 807          }
 808      }
 809  
 810      if ( ( $core || $plugins || $themes ) && wp_get_translation_updates() ) {
 811          $counts['translations'] = 1;
 812      }
 813  
 814      $counts['total'] = $counts['plugins'] + $counts['themes'] + $counts['wordpress'] + $counts['translations'];
 815      $titles          = array();
 816  
 817      if ( $counts['wordpress'] ) {
 818          /* translators: %d: Number of available WordPress updates. */
 819          $titles['wordpress'] = sprintf( __( '%d WordPress Update' ), $counts['wordpress'] );
 820      }
 821  
 822      if ( $counts['plugins'] ) {
 823          /* translators: %d: Number of available plugin updates. */
 824          $titles['plugins'] = sprintf( _n( '%d Plugin Update', '%d Plugin Updates', $counts['plugins'] ), $counts['plugins'] );
 825      }
 826  
 827      if ( $counts['themes'] ) {
 828          /* translators: %d: Number of available theme updates. */
 829          $titles['themes'] = sprintf( _n( '%d Theme Update', '%d Theme Updates', $counts['themes'] ), $counts['themes'] );
 830      }
 831  
 832      if ( $counts['translations'] ) {
 833          $titles['translations'] = __( 'Translation Updates' );
 834      }
 835  
 836      $update_title = $titles ? esc_attr( implode( ', ', $titles ) ) : '';
 837  
 838      $update_data = array(
 839          'counts' => $counts,
 840          'title'  => $update_title,
 841      );
 842      /**
 843       * Filters the returned array of update data for plugins, themes, and WordPress core.
 844       *
 845       * @since 3.5.0
 846       *
 847       * @param array $update_data {
 848       *     Fetched update data.
 849       *
 850       *     @type array   $counts       An array of counts for available plugin, theme, and WordPress updates.
 851       *     @type string  $update_title Titles of available updates.
 852       * }
 853       * @param array $titles An array of update counts and UI strings for available updates.
 854       */
 855      return apply_filters( 'wp_get_update_data', $update_data, $titles );
 856  }
 857  
 858  /**
 859   * Determines whether core should be updated.
 860   *
 861   * @since 2.8.0
 862   *
 863   * @global string $wp_version The WordPress version string.
 864   */
 865  function _maybe_update_core() {
 866      // Include an unmodified $wp_version.
 867      require  ABSPATH . WPINC . '/version.php';
 868  
 869      $current = get_site_transient( 'update_core' );
 870  
 871      if ( isset( $current->last_checked, $current->version_checked )
 872          && 12 * HOUR_IN_SECONDS > ( time() - $current->last_checked )
 873          && $current->version_checked === $wp_version
 874      ) {
 875          return;
 876      }
 877  
 878      wp_version_check();
 879  }
 880  /**
 881   * Check the last time plugins were run before checking plugin versions.
 882   *
 883   * This might have been backported to WordPress 2.6.1 for performance reasons.
 884   * This is used for the wp-admin to check only so often instead of every page
 885   * load.
 886   *
 887   * @since 2.7.0
 888   * @access private
 889   */
 890  function _maybe_update_plugins() {
 891      $current = get_site_transient( 'update_plugins' );
 892  
 893      if ( isset( $current->last_checked )
 894          && 12 * HOUR_IN_SECONDS > ( time() - $current->last_checked )
 895      ) {
 896          return;
 897      }
 898  
 899      wp_update_plugins();
 900  }
 901  
 902  /**
 903   * Check themes versions only after a duration of time.
 904   *
 905   * This is for performance reasons to make sure that on the theme version
 906   * checker is not run on every page load.
 907   *
 908   * @since 2.7.0
 909   * @access private
 910   */
 911  function _maybe_update_themes() {
 912      $current = get_site_transient( 'update_themes' );
 913  
 914      if ( isset( $current->last_checked )
 915          && 12 * HOUR_IN_SECONDS > ( time() - $current->last_checked )
 916      ) {
 917          return;
 918      }
 919  
 920      wp_update_themes();
 921  }
 922  
 923  /**
 924   * Schedule core, theme, and plugin update checks.
 925   *
 926   * @since 3.1.0
 927   */
 928  function wp_schedule_update_checks() {
 929      if ( ! wp_next_scheduled( 'wp_version_check' ) && ! wp_installing() ) {
 930          wp_schedule_event( time(), 'twicedaily', 'wp_version_check' );
 931      }
 932  
 933      if ( ! wp_next_scheduled( 'wp_update_plugins' ) && ! wp_installing() ) {
 934          wp_schedule_event( time(), 'twicedaily', 'wp_update_plugins' );
 935      }
 936  
 937      if ( ! wp_next_scheduled( 'wp_update_themes' ) && ! wp_installing() ) {
 938          wp_schedule_event( time(), 'twicedaily', 'wp_update_themes' );
 939      }
 940  }
 941  
 942  /**
 943   * Clear existing update caches for plugins, themes, and core.
 944   *
 945   * @since 4.1.0
 946   */
 947  function wp_clean_update_cache() {
 948      if ( function_exists( 'wp_clean_plugins_cache' ) ) {
 949          wp_clean_plugins_cache();
 950      } else {
 951          delete_site_transient( 'update_plugins' );
 952      }
 953  
 954      wp_clean_themes_cache();
 955  
 956      delete_site_transient( 'update_core' );
 957  }
 958  
 959  if ( ( ! is_main_site() && ! is_network_admin() ) || wp_doing_ajax() ) {
 960      return;
 961  }
 962  
 963  add_action( 'admin_init', '_maybe_update_core' );
 964  add_action( 'wp_version_check', 'wp_version_check' );
 965  
 966  add_action( 'load-plugins.php', 'wp_update_plugins' );
 967  add_action( 'load-update.php', 'wp_update_plugins' );
 968  add_action( 'load-update-core.php', 'wp_update_plugins' );
 969  add_action( 'admin_init', '_maybe_update_plugins' );
 970  add_action( 'wp_update_plugins', 'wp_update_plugins' );
 971  
 972  add_action( 'load-themes.php', 'wp_update_themes' );
 973  add_action( 'load-update.php', 'wp_update_themes' );
 974  add_action( 'load-update-core.php', 'wp_update_themes' );
 975  add_action( 'admin_init', '_maybe_update_themes' );
 976  add_action( 'wp_update_themes', 'wp_update_themes' );
 977  
 978  add_action( 'update_option_WPLANG', 'wp_clean_update_cache', 10, 0 );
 979  
 980  add_action( 'wp_maybe_auto_update', 'wp_maybe_auto_update' );
 981  
 982  add_action( 'init', 'wp_schedule_update_checks' );


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