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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 $wp_version, $wpdb, $wp_local_package;
  27      $php_version = phpversion();
  28  
  29      $current = get_transient( 'update_core' );
  30      if ( ! is_object($current) ) {
  31          $current = new stdClass;
  32          $current->updates = array();
  33          $current->version_checked = $wp_version;
  34      }
  35  
  36      $locale = apply_filters( 'core_version_check_locale', get_locale() );
  37  
  38      // Update last_checked for current to prevent multiple blocking requests if request hangs
  39      $current->last_checked = time();
  40      set_transient( 'update_core', $current );
  41  
  42      if ( method_exists( $wpdb, 'db_version' ) )
  43          $mysql_version = preg_replace('/[^0-9.].*/', '', $wpdb->db_version());
  44      else
  45          $mysql_version = 'N/A';
  46      $local_package = isset( $wp_local_package )? $wp_local_package : '';
  47      $url = "http://api.wordpress.org/core/version-check/1.3/?version=$wp_version&php=$php_version&locale=$locale&mysql=$mysql_version&local_package=$local_package";
  48  
  49      $options = array(
  50          'timeout' => ( ( defined('DOING_CRON') && DOING_CRON ) ? 30 : 3),
  51          'user-agent' => 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' )
  52      );
  53  
  54      $response = wp_remote_get($url, $options);
  55  
  56      if ( is_wp_error( $response ) )
  57          return false;
  58  
  59      if ( 200 != $response['response']['code'] )
  60          return false;
  61  
  62      $body = trim( $response['body'] );
  63      $body = str_replace(array("\r\n", "\r"), "\n", $body);
  64      $new_options = array();
  65      foreach( explode( "\n\n", $body ) as $entry) {
  66          $returns = explode("\n", $entry);
  67          $new_option = new stdClass();
  68          $new_option->response = esc_attr( $returns[0] );
  69          if ( isset( $returns[1] ) )
  70              $new_option->url = esc_url( $returns[1] );
  71          if ( isset( $returns[2] ) )
  72              $new_option->package = esc_url( $returns[2] );
  73          if ( isset( $returns[3] ) )
  74              $new_option->current = esc_attr( $returns[3] );
  75          if ( isset( $returns[4] ) )
  76              $new_option->locale = esc_attr( $returns[4] );
  77          $new_options[] = $new_option;
  78      }
  79  
  80      $updates = new stdClass();
  81      $updates->updates = $new_options;
  82      $updates->last_checked = time();
  83      $updates->version_checked = $wp_version;
  84      set_transient( 'update_core',  $updates);
  85  }
  86  
  87  /**
  88   * Check plugin versions against the latest versions hosted on WordPress.org.
  89   *
  90   * The WordPress version, PHP version, and Locale is sent along with a list of
  91   * all plugins installed. Checks against the WordPress server at
  92   * api.wordpress.org. Will only check if WordPress isn't installing.
  93   *
  94   * @package WordPress
  95   * @since 2.3.0
  96   * @uses $wp_version Used to notidy the WordPress version.
  97   *
  98   * @return mixed Returns null if update is unsupported. Returns false if check is too soon.
  99   */
 100  function wp_update_plugins() {
 101      global $wp_version;
 102  
 103      if ( defined('WP_INSTALLING') )
 104          return false;
 105  
 106      // If running blog-side, bail unless we've not checked in the last 12 hours
 107      if ( !function_exists( 'get_plugins' ) )
 108          require_once ( ABSPATH . 'wp-admin/includes/plugin.php' );
 109  
 110      $plugins = get_plugins();
 111      $active  = get_option( 'active_plugins' );
 112      $current = get_transient( 'update_plugins' );
 113      if ( ! is_object($current) )
 114          $current = new stdClass;
 115  
 116      $new_option = new stdClass;
 117      $new_option->last_checked = time();
 118      $timeout = 'load-plugins.php' == current_filter() ? 3600 : 43200; //Check for updated every 60 minutes if hitting the themes page, Else, check every 12 hours
 119      $time_not_changed = isset( $current->last_checked ) && $timeout > ( time() - $current->last_checked );
 120  
 121      $plugin_changed = false;
 122      foreach ( $plugins as $file => $p ) {
 123          $new_option->checked[ $file ] = $p['Version'];
 124  
 125          if ( !isset( $current->checked[ $file ] ) || strval($current->checked[ $file ]) !== strval($p['Version']) )
 126              $plugin_changed = true;
 127      }
 128  
 129      if ( isset ( $current->response ) && is_array( $current->response ) ) {
 130          foreach ( $current->response as $plugin_file => $update_details ) {
 131              if ( ! isset($plugins[ $plugin_file ]) ) {
 132                  $plugin_changed = true;
 133                  break;
 134              }
 135          }
 136      }
 137  
 138      // Bail if we've checked in the last 12 hours and if nothing has changed
 139      if ( $time_not_changed && !$plugin_changed )
 140          return false;
 141  
 142      // Update last_checked for current to prevent multiple blocking requests if request hangs
 143      $current->last_checked = time();
 144      set_transient( 'update_plugins', $current );
 145  
 146      $to_send = (object)compact('plugins', 'active');
 147  
 148      $options = array(
 149          'timeout' => ( ( defined('DOING_CRON') && DOING_CRON ) ? 30 : 3),
 150          'body' => array( 'plugins' => serialize( $to_send ) ),
 151          'user-agent' => 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' )
 152      );
 153  
 154      $raw_response = wp_remote_post('http://api.wordpress.org/plugins/update-check/1.0/', $options);
 155  
 156      if ( is_wp_error( $raw_response ) )
 157          return false;
 158  
 159      if( 200 != $raw_response['response']['code'] )
 160          return false;
 161  
 162      $response = unserialize( $raw_response['body'] );
 163  
 164      if ( false !== $response )
 165          $new_option->response = $response;
 166      else
 167          $new_option->response = array();
 168  
 169      set_transient( 'update_plugins', $new_option );
 170  }
 171  
 172  /**
 173   * Check theme versions against the latest versions hosted on WordPress.org.
 174   *
 175   * A list of all themes installed in sent to WP. Checks against the
 176   * WordPress server at api.wordpress.org. Will only check if WordPress isn't
 177   * installing.
 178   *
 179   * @package WordPress
 180   * @since 2.7.0
 181   * @uses $wp_version Used to notidy the WordPress version.
 182   *
 183   * @return mixed Returns null if update is unsupported. Returns false if check is too soon.
 184   */
 185  function wp_update_themes( ) {
 186      global $wp_version;
 187  
 188      if( defined( 'WP_INSTALLING' ) )
 189          return false;
 190  
 191      if( !function_exists( 'get_themes' ) )
 192          require_once ( ABSPATH . 'wp-includes/theme.php' );
 193  
 194      $installed_themes = get_themes( );
 195      $current_theme = get_transient( 'update_themes' );
 196      if ( ! is_object($current_theme) )
 197          $current_theme = new stdClass;
 198  
 199      $new_option = new stdClass;
 200      $new_option->last_checked = time( );
 201      $timeout = 'load-themes.php' == current_filter() ? 3600 : 43200; //Check for updated every 60 minutes if hitting the themes page, Else, check every 12 hours
 202      $time_not_changed = isset( $current_theme->last_checked ) && $timeout > ( time( ) - $current_theme->last_checked );
 203  
 204      $themes = array();
 205      $checked = array();
 206      $themes['current_theme'] = (array) $current_theme;
 207      foreach( (array) $installed_themes as $theme_title => $theme ) {
 208          $themes[$theme['Stylesheet']] = array();
 209          $checked[$theme['Stylesheet']] = $theme['Version'];
 210  
 211          foreach( (array) $theme as $key => $value ) {
 212              $themes[$theme['Stylesheet']][$key] = $value;
 213          }
 214      }
 215  
 216      $theme_changed = false;
 217      foreach ( $checked as $slug => $v ) {
 218          $new_option->checked[ $slug ] = $v;
 219  
 220          if ( !isset( $current_theme->checked[ $slug ] ) || strval($current_theme->checked[ $slug ]) !== strval($v) )
 221              $theme_changed = true;
 222      }
 223  
 224      if ( isset ( $current_theme->response ) && is_array( $current_theme->response ) ) {
 225          foreach ( $current_theme->response as $slug => $update_details ) {
 226              if ( ! isset($checked[ $slug ]) ) {
 227                  $theme_changed = true;
 228                  break;
 229              }
 230          }
 231      }
 232  
 233      if( $time_not_changed && !$theme_changed )
 234          return false;
 235  
 236      // Update last_checked for current to prevent multiple blocking requests if request hangs
 237      $current_theme->last_checked = time();
 238      set_transient( 'update_themes', $current_theme );
 239  
 240      $current_theme->template = get_option( 'template' );
 241  
 242      $options = array(
 243          'timeout' => ( ( defined('DOING_CRON') && DOING_CRON ) ? 30 : 3),
 244          'body'            => array( 'themes' => serialize( $themes ) ),
 245          'user-agent'    => 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' )
 246      );
 247  
 248      $raw_response = wp_remote_post( 'http://api.wordpress.org/themes/update-check/1.0/', $options );
 249  
 250      if( is_wp_error( $raw_response ) )
 251          return false;
 252  
 253      if( 200 != $raw_response['response']['code'] )
 254          return false;
 255  
 256      $response = unserialize( $raw_response['body'] );
 257      if( $response ) {
 258          $new_option->checked = $checked;
 259          $new_option->response = $response;
 260      }
 261  
 262      set_transient( 'update_themes', $new_option );
 263  }
 264  
 265  function _maybe_update_core() {
 266      global $wp_version;
 267  
 268      $current = get_transient( 'update_core' );
 269  
 270      if ( isset( $current->last_checked ) &&
 271          43200 > ( time() - $current->last_checked ) &&
 272          isset( $current->version_checked ) &&
 273          $current->version_checked == $wp_version )
 274          return;
 275  
 276      wp_version_check();
 277  }
 278  /**
 279   * Check the last time plugins were run before checking plugin versions.
 280   *
 281   * This might have been backported to WordPress 2.6.1 for performance reasons.
 282   * This is used for the wp-admin to check only so often instead of every page
 283   * load.
 284   *
 285   * @since 2.7.0
 286   * @access private
 287   */
 288  function _maybe_update_plugins() {
 289      $current = get_transient( 'update_plugins' );
 290      if ( isset( $current->last_checked ) && 43200 > ( time() - $current->last_checked ) )
 291          return;
 292      wp_update_plugins();
 293  }
 294  
 295  /**
 296   * Check themes versions only after a duration of time.
 297   *
 298   * This is for performance reasons to make sure that on the theme version
 299   * checker is not run on every page load.
 300   *
 301   * @since 2.7.0
 302   * @access private
 303   */
 304  function _maybe_update_themes( ) {
 305      $current = get_transient( 'update_themes' );
 306      if( isset( $current->last_checked ) && 43200 > ( time( ) - $current->last_checked ) )
 307          return;
 308  
 309      wp_update_themes();
 310  }
 311  
 312  add_action( 'admin_init', '_maybe_update_core' );
 313  add_action( 'wp_version_check', 'wp_version_check' );
 314  
 315  add_action( 'load-plugins.php', 'wp_update_plugins' );
 316  add_action( 'load-update.php', 'wp_update_plugins' );
 317  add_action( 'load-update-core.php', 'wp_update_plugins' );
 318  add_action( 'admin_init', '_maybe_update_plugins' );
 319  add_action( 'wp_update_plugins', 'wp_update_plugins' );
 320  
 321  add_action( 'load-themes.php', 'wp_update_themes' );
 322  add_action( 'load-update.php', 'wp_update_themes' );
 323  add_action( 'admin_init', '_maybe_update_themes' );
 324  add_action( 'wp_update_themes', 'wp_update_themes' );
 325  
 326  if ( !wp_next_scheduled('wp_version_check') && !defined('WP_INSTALLING') )
 327      wp_schedule_event(time(), 'twicedaily', 'wp_version_check');
 328  
 329  if ( !wp_next_scheduled('wp_update_plugins') && !defined('WP_INSTALLING') )
 330      wp_schedule_event(time(), 'twicedaily', 'wp_update_plugins');
 331  
 332  if ( !wp_next_scheduled('wp_update_themes') && !defined('WP_INSTALLING') )
 333      wp_schedule_event(time(), 'twicedaily', 'wp_update_themes');
 334  
 335  ?>