+ // Update last_checked for current to prevent multiple blocking requests if request hangs
+ $current->last_checked = time();
+ set_site_transient( 'update_plugins', $current );
+
+ $to_send = (object) compact('plugins', 'active');
+
+ $options = array(
+ 'timeout' => ( ( defined('DOING_CRON') && DOING_CRON ) ? 30 : 3),
+ 'body' => array( 'plugins' => serialize( $to_send ) ),
+ 'user-agent' => 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' )
+ );
+
+ $raw_response = wp_remote_post('http://api.wordpress.org/plugins/update-check/1.0/', $options);
+
+ if ( is_wp_error( $raw_response ) || 200 != wp_remote_retrieve_response_code( $raw_response ) )
+ return false;
+
+ $response = maybe_unserialize( wp_remote_retrieve_body( $raw_response ) );
+
+ if ( is_array( $response ) )
+ $new_option->response = $response;
+ else
+ $new_option->response = array();
+
+ set_site_transient( 'update_plugins', $new_option );
+}
+
+/**
+ * Check theme versions against the latest versions hosted on WordPress.org.
+ *
+ * A list of all themes installed in sent to WP. Checks against the
+ * WordPress server at api.wordpress.org. Will only check if WordPress isn't
+ * installing.
+ *
+ * @package WordPress
+ * @since 2.7.0
+ * @uses $wp_version Used to notify the WordPress version.
+ *
+ * @return mixed Returns null if update is unsupported. Returns false if check is too soon.
+ */
+function wp_update_themes() {
+ include ABSPATH . WPINC . '/version.php'; // include an unmodified $wp_version
+
+ if ( defined( 'WP_INSTALLING' ) )
+ return false;
+
+ $installed_themes = wp_get_themes();
+ $last_update = get_site_transient( 'update_themes' );
+ if ( ! is_object($last_update) )
+ $last_update = new stdClass;
+
+ $themes = array();
+ $checked = array();
+
+ // Put slug of current theme into request.
+ $themes['current_theme'] = get_option( 'stylesheet' );
+
+ foreach ( $installed_themes as $theme ) {
+ $checked[ $theme->get_stylesheet() ] = $theme->get('Version');
+
+ $themes[ $theme->get_stylesheet() ] = array(
+ 'Name' => $theme->get('Name'),
+ 'Title' => $theme->get('Name'),
+ 'Version' => $theme->get('Version'),
+ 'Author' => $theme->get('Author'),
+ 'Author URI' => $theme->get('AuthorURI'),
+ 'Template' => $theme->get_template(),
+ 'Stylesheet' => $theme->get_stylesheet(),
+ );
+ }
+
+ // Check for update on a different schedule, depending on the page.
+ switch ( current_filter() ) {
+ case 'load-update-core.php' :
+ $timeout = MINUTE_IN_SECONDS;
+ break;
+ case 'load-themes.php' :
+ case 'load-update.php' :
+ $timeout = HOUR_IN_SECONDS;
+ break;
+ default :
+ $timeout = 12 * HOUR_IN_SECONDS;
+ }
+
+ $time_not_changed = isset( $last_update->last_checked ) && $timeout > ( time( ) - $last_update->last_checked );
+
+ if ( $time_not_changed ) {
+ $theme_changed = false;
+ foreach ( $checked as $slug => $v ) {
+ if ( !isset( $last_update->checked[ $slug ] ) || strval($last_update->checked[ $slug ]) !== strval($v) )
+ $theme_changed = true;