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   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. Checks against the
  13   * WordPress server at api.wordpress.org server. Will only check if WordPress
  14   * isn't installing.
  15   *
  16   * @package WordPress
  17   * @since 2.3.0
  18   * @uses $wp_version Used to check against the newest WordPress version.
  19   *
  20   * @return mixed Returns null if update is unsupported. Returns false if check is too soon.
  21   */
  22  function wp_version_check() {
  23      if ( defined('WP_INSTALLING') )
  24          return;
  25  
  26      global $wpdb, $wp_local_package;
  27      include  ABSPATH . WPINC . '/version.php'; // include an unmodified $wp_version
  28      $php_version = phpversion();
  29  
  30      $current = get_site_transient( 'update_core' );
  31      if ( ! is_object($current) ) {
  32          $current = new stdClass;
  33          $current->updates = array();
  34          $current->version_checked = $wp_version;
  35      }
  36  
  37      // Wait 60 seconds between multiple version check requests
  38      $timeout = 60;
  39      $time_not_changed = isset( $current->last_checked ) && $timeout > ( time() - $current->last_checked );
  40      if ( $time_not_changed )
  41          return false;
  42  
  43      $locale = apply_filters( 'core_version_check_locale', get_locale() );
  44  
  45      // Update last_checked for current to prevent multiple blocking requests if request hangs
  46      $current->last_checked = time();
  47      set_site_transient( 'update_core', $current );
  48  
  49      if ( method_exists( $wpdb, 'db_version' ) )
  50          $mysql_version = preg_replace('/[^0-9.].*/', '', $wpdb->db_version());
  51      else
  52          $mysql_version = 'N/A';
  53  
  54      if ( is_multisite( ) ) {
  55          $user_count = get_user_count( );
  56          $num_blogs = get_blog_count( );
  57          $wp_install = network_site_url( );
  58          $multisite_enabled = 1;
  59      } else {
  60          $user_count = count_users( );
  61          $multisite_enabled = 0;
  62          $num_blogs = 1;
  63          $wp_install = home_url( '/' );
  64      }
  65  
  66      $query = array(
  67          'version'           => $wp_version,
  68          'php'               => $php_version,
  69          'locale'            => $locale,
  70          'mysql'             => $mysql_version,
  71          'local_package'     => isset( $wp_local_package ) ? $wp_local_package : '',
  72          'blogs'             => $num_blogs,
  73          'users'             => $user_count['total_users'],
  74          'multisite_enabled' => $multisite_enabled
  75      );
  76  
  77      $url = 'http://api.wordpress.org/core/version-check/1.6/?' . http_build_query( $query, null, '&' );
  78  
  79      $options = array(
  80          'timeout' => ( ( defined('DOING_CRON') && DOING_CRON ) ? 30 : 3 ),
  81          'user-agent' => 'WordPress/' . $wp_version . '; ' . home_url( '/' ),
  82          'headers' => array(
  83              'wp_install' => $wp_install,
  84              'wp_blog' => home_url( '/' )
  85          )
  86      );
  87  
  88      $response = wp_remote_get($url, $options);
  89  
  90      if ( is_wp_error( $response ) || 200 != wp_remote_retrieve_response_code( $response ) )
  91          return false;
  92  
  93      $body = trim( wp_remote_retrieve_body( $response ) );
  94      $body = maybe_unserialize( $body );
  95  
  96      if ( ! is_array( $body ) || ! isset( $body['offers'] ) )
  97          return false;
  98  
  99      $offers = $body['offers'];
 100  
 101      foreach ( $offers as &$offer ) {
 102          foreach ( $offer as $offer_key => $value ) {
 103              if ( 'packages' == $offer_key )
 104                  $offer['packages'] = (object) array_intersect_key( array_map( 'esc_url', $offer['packages'] ),
 105                      array_fill_keys( array( 'full', 'no_content', 'new_bundled', 'partial' ), '' ) );
 106              elseif ( 'download' == $offer_key )
 107                  $offer['download'] = esc_url( $value );
 108              else
 109                  $offer[ $offer_key ] = esc_html( $value );
 110          }
 111          $offer = (object) array_intersect_key( $offer, array_fill_keys( array( 'response', 'download', 'locale',
 112              'packages', 'current', 'php_version', 'mysql_version', 'new_bundled', 'partial_version' ), '' ) );
 113      }
 114  
 115      $updates = new stdClass();
 116      $updates->updates = $offers;
 117      $updates->last_checked = time();
 118      $updates->version_checked = $wp_version;
 119      set_site_transient( 'update_core',  $updates);
 120  }
 121  
 122  /**
 123   * Check plugin versions against the latest versions hosted on WordPress.org.
 124   *
 125   * The WordPress version, PHP version, and Locale is sent along with a list of
 126   * all plugins installed. Checks against the WordPress server at
 127   * api.wordpress.org. Will only check if WordPress isn't installing.
 128   *
 129   * @package WordPress
 130   * @since 2.3.0
 131   * @uses $wp_version Used to notify the WordPress version.
 132   *
 133   * @return mixed Returns null if update is unsupported. Returns false if check is too soon.
 134   */
 135  function wp_update_plugins() {
 136      include  ABSPATH . WPINC . '/version.php'; // include an unmodified $wp_version
 137  
 138      if ( defined('WP_INSTALLING') )
 139          return false;
 140  
 141      // If running blog-side, bail unless we've not checked in the last 12 hours
 142      if ( !function_exists( 'get_plugins' ) )
 143          require_once ( ABSPATH . 'wp-admin/includes/plugin.php' );
 144  
 145      $plugins = get_plugins();
 146      $active  = get_option( 'active_plugins', array() );
 147      $current = get_site_transient( 'update_plugins' );
 148      if ( ! is_object($current) )
 149          $current = new stdClass;
 150  
 151      $new_option = new stdClass;
 152      $new_option->last_checked = time();
 153  
 154      // Check for update on a different schedule, depending on the page.
 155      switch ( current_filter() ) {
 156          case 'load-update-core.php' :
 157              $timeout = 60; // 1 min
 158              break;
 159          case 'load-plugins.php' :
 160          case 'load-update.php' :
 161              $timeout = 3600; // 1 hour
 162              break;
 163          default :
 164              $timeout = 43200; // 12 hours
 165      }
 166  
 167      $time_not_changed = isset( $current->last_checked ) && $timeout > ( time() - $current->last_checked );
 168  
 169      if ( $time_not_changed ) {
 170          $plugin_changed = false;
 171          foreach ( $plugins as $file => $p ) {
 172              $new_option->checked[ $file ] = $p['Version'];
 173  
 174              if ( !isset( $current->checked[ $file ] ) || strval($current->checked[ $file ]) !== strval($p['Version']) )
 175                  $plugin_changed = true;
 176          }
 177  
 178          if ( isset ( $current->response ) && is_array( $current->response ) ) {
 179              foreach ( $current->response as $plugin_file => $update_details ) {
 180                  if ( ! isset($plugins[ $plugin_file ]) ) {
 181                      $plugin_changed = true;
 182                      break;
 183                  }
 184              }
 185          }
 186  
 187          // Bail if we've checked recently and if nothing has changed
 188          if ( ! $plugin_changed )
 189              return false;
 190      }
 191  
 192      // Update last_checked for current to prevent multiple blocking requests if request hangs
 193      $current->last_checked = time();
 194      set_site_transient( 'update_plugins', $current );
 195  
 196      $to_send = (object) compact('plugins', 'active');
 197  
 198      $options = array(
 199          'timeout' => ( ( defined('DOING_CRON') && DOING_CRON ) ? 30 : 3),
 200          'body' => array( 'plugins' => serialize( $to_send ) ),
 201          'user-agent' => 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' )
 202      );
 203  
 204      $raw_response = wp_remote_post('http://api.wordpress.org/plugins/update-check/1.0/', $options);
 205  
 206      if ( is_wp_error( $raw_response ) || 200 != wp_remote_retrieve_response_code( $raw_response ) )
 207          return false;
 208  
 209      $response = maybe_unserialize( wp_remote_retrieve_body( $raw_response ) );
 210  
 211      if ( is_array( $response ) )
 212          $new_option->response = $response;
 213      else
 214          $new_option->response = array();
 215  
 216      set_site_transient( 'update_plugins', $new_option );
 217  }
 218  
 219  /**
 220   * Check theme versions against the latest versions hosted on WordPress.org.
 221   *
 222   * A list of all themes installed in sent to WP. Checks against the
 223   * WordPress server at api.wordpress.org. Will only check if WordPress isn't
 224   * installing.
 225   *
 226   * @package WordPress
 227   * @since 2.7.0
 228   * @uses $wp_version Used to notify the WordPress version.
 229   *
 230   * @return mixed Returns null if update is unsupported. Returns false if check is too soon.
 231   */
 232  function wp_update_themes() {
 233      include  ABSPATH . WPINC . '/version.php'; // include an unmodified $wp_version
 234  
 235      if ( defined( 'WP_INSTALLING' ) )
 236          return false;
 237  
 238      $installed_themes = wp_get_themes();
 239      $last_update = get_site_transient( 'update_themes' );
 240      if ( ! is_object($last_update) )
 241          $last_update = new stdClass;
 242  
 243      $themes = array();
 244      $checked = array();
 245  
 246      // Put slug of current theme into request.
 247      $themes['current_theme'] = get_option( 'stylesheet' );
 248  
 249      foreach ( $installed_themes as $theme ) {
 250          $checked[ $theme->get_stylesheet() ] = $theme->get('Version');
 251  
 252          $themes[ $theme->get_stylesheet() ] = array(
 253              'Name'       => $theme->get('Name'),
 254              'Title'      => $theme->get('Name'),
 255              'Version'    => $theme->get('Version'),
 256              'Author'     => $theme->get('Author'),
 257              'Author URI' => $theme->get('AuthorURI'),
 258              'Template'   => $theme->get_template(),
 259              'Stylesheet' => $theme->get_stylesheet(),
 260          );
 261      }
 262  
 263      // Check for update on a different schedule, depending on the page.
 264      switch ( current_filter() ) {
 265          case 'load-update-core.php' :
 266              $timeout = 60; // 1 min
 267              break;
 268          case 'load-themes.php' :
 269          case 'load-update.php' :
 270              $timeout = 3600; // 1 hour
 271              break;
 272          default :
 273              $timeout = 43200; // 12 hours
 274      }
 275  
 276      $time_not_changed = isset( $last_update->last_checked ) && $timeout > ( time( ) - $last_update->last_checked );
 277  
 278      if ( $time_not_changed ) {
 279          $theme_changed = false;
 280          foreach ( $checked as $slug => $v ) {
 281              $update_request->checked[ $slug ] = $v;
 282  
 283              if ( !isset( $last_update->checked[ $slug ] ) || strval($last_update->checked[ $slug ]) !== strval($v) )
 284                  $theme_changed = true;
 285          }
 286  
 287          if ( isset ( $last_update->response ) && is_array( $last_update->response ) ) {
 288              foreach ( $last_update->response as $slug => $update_details ) {
 289                  if ( ! isset($checked[ $slug ]) ) {
 290                      $theme_changed = true;
 291                      break;
 292                  }
 293              }
 294          }
 295  
 296          // Bail if we've checked recently and if nothing has changed
 297          if ( ! $theme_changed )
 298              return false;
 299      }
 300  
 301      // Update last_checked for current to prevent multiple blocking requests if request hangs
 302      $last_update->last_checked = time();
 303      set_site_transient( 'update_themes', $last_update );
 304  
 305      $options = array(
 306          'timeout' => ( ( defined('DOING_CRON') && DOING_CRON ) ? 30 : 3),
 307          'body'            => array( 'themes' => serialize( $themes ) ),
 308          'user-agent'    => 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' )
 309      );
 310  
 311      $raw_response = wp_remote_post( 'http://api.wordpress.org/themes/update-check/1.0/', $options );
 312  
 313      if ( is_wp_error( $raw_response ) || 200 != wp_remote_retrieve_response_code( $raw_response ) )
 314          return false;
 315  
 316      $new_update = new stdClass;
 317      $new_update->last_checked = time( );
 318      $new_update->checked = $checked;
 319  
 320      $response = maybe_unserialize( wp_remote_retrieve_body( $raw_response ) );
 321      if ( is_array( $response ) )
 322          $new_update->response = $response;
 323  
 324      set_site_transient( 'update_themes', $new_update );
 325  }
 326  
 327  /*
 328   * Collect counts and UI strings for available updates
 329   *
 330   * @since 3.3.0
 331   *
 332   * @return array
 333   */
 334  function wp_get_update_data() {
 335      $counts = array( 'plugins' => 0, 'themes' => 0, 'wordpress' => 0 );
 336  
 337      if ( current_user_can( 'update_plugins' ) ) {
 338          $update_plugins = get_site_transient( 'update_plugins' );
 339          if ( ! empty( $update_plugins->response ) )
 340              $counts['plugins'] = count( $update_plugins->response );
 341      }
 342  
 343      if ( current_user_can( 'update_themes' ) ) {
 344          $update_themes = get_site_transient( 'update_themes' );
 345          if ( ! empty( $update_themes->response ) )
 346              $counts['themes'] = count( $update_themes->response );
 347      }
 348  
 349      if ( function_exists( 'get_core_updates' ) && current_user_can( 'update_core' ) ) {
 350          $update_wordpress = get_core_updates( array('dismissed' => false) );
 351          if ( ! empty( $update_wordpress ) && ! in_array( $update_wordpress[0]->response, array('development', 'latest') ) && current_user_can('update_core') )
 352              $counts['wordpress'] = 1;
 353      }
 354  
 355      $counts['total'] = $counts['plugins'] + $counts['themes'] + $counts['wordpress'];
 356      $update_title = array();
 357      if ( $counts['wordpress'] )
 358          $update_title[] = sprintf(__('%d WordPress Update'), $counts['wordpress']);
 359      if ( $counts['plugins'] )
 360          $update_title[] = sprintf(_n('%d Plugin Update', '%d Plugin Updates', $counts['plugins']), $counts['plugins']);
 361      if ( $counts['themes'] )
 362          $update_title[] = sprintf(_n('%d Theme Update', '%d Theme Updates', $counts['themes']), $counts['themes']);
 363  
 364      $update_title = ! empty( $update_title ) ? esc_attr( implode( ', ', $update_title ) ) : '';
 365  
 366      return array( 'counts' => $counts, 'title' => $update_title );
 367  }
 368  
 369  function _maybe_update_core() {
 370      include  ABSPATH . WPINC . '/version.php'; // include an unmodified $wp_version
 371  
 372      $current = get_site_transient( 'update_core' );
 373  
 374      if ( isset( $current->last_checked ) &&
 375          43200 > ( time() - $current->last_checked ) &&
 376          isset( $current->version_checked ) &&
 377          $current->version_checked == $wp_version )
 378          return;
 379  
 380      wp_version_check();
 381  }
 382  /**
 383   * Check the last time plugins were run before checking plugin versions.
 384   *
 385   * This might have been backported to WordPress 2.6.1 for performance reasons.
 386   * This is used for the wp-admin to check only so often instead of every page
 387   * load.
 388   *
 389   * @since 2.7.0
 390   * @access private
 391   */
 392  function _maybe_update_plugins() {
 393      $current = get_site_transient( 'update_plugins' );
 394      if ( isset( $current->last_checked ) && 43200 > ( time() - $current->last_checked ) )
 395          return;
 396      wp_update_plugins();
 397  }
 398  
 399  /**
 400   * Check themes versions only after a duration of time.
 401   *
 402   * This is for performance reasons to make sure that on the theme version
 403   * checker is not run on every page load.
 404   *
 405   * @since 2.7.0
 406   * @access private
 407   */
 408  function _maybe_update_themes( ) {
 409      $current = get_site_transient( 'update_themes' );
 410      if ( isset( $current->last_checked ) && 43200 > ( time( ) - $current->last_checked ) )
 411          return;
 412  
 413      wp_update_themes();
 414  }
 415  
 416  /**
 417   * Schedule core, theme, and plugin update checks.
 418   *
 419   * @since 3.1.0
 420   */
 421  function wp_schedule_update_checks() {
 422      if ( !wp_next_scheduled('wp_version_check') && !defined('WP_INSTALLING') )
 423          wp_schedule_event(time(), 'twicedaily', 'wp_version_check');
 424  
 425      if ( !wp_next_scheduled('wp_update_plugins') && !defined('WP_INSTALLING') )
 426          wp_schedule_event(time(), 'twicedaily', 'wp_update_plugins');
 427  
 428      if ( !wp_next_scheduled('wp_update_themes') && !defined('WP_INSTALLING') )
 429          wp_schedule_event(time(), 'twicedaily', 'wp_update_themes');
 430  }
 431  
 432  if ( ( ! is_main_site() && ! is_network_admin() ) || ( defined( 'DOING_AJAX' ) && DOING_AJAX ) )
 433      return;
 434  
 435  add_action( 'admin_init', '_maybe_update_core' );
 436  add_action( 'wp_version_check', 'wp_version_check' );
 437  
 438  add_action( 'load-plugins.php', 'wp_update_plugins' );
 439  add_action( 'load-update.php', 'wp_update_plugins' );
 440  add_action( 'load-update-core.php', 'wp_update_plugins' );
 441  add_action( 'admin_init', '_maybe_update_plugins' );
 442  add_action( 'wp_update_plugins', 'wp_update_plugins' );
 443  
 444  add_action( 'load-themes.php', 'wp_update_themes' );
 445  add_action( 'load-update.php', 'wp_update_themes' );
 446  add_action( 'load-update-core.php', 'wp_update_themes' );
 447  add_action( 'admin_init', '_maybe_update_themes' );
 448  add_action( 'wp_update_themes', 'wp_update_themes' );
 449  
 450  add_action('init', 'wp_schedule_update_checks');