+ $current = get_site_transient( 'update_core' );
+ if ( ! is_object($current) ) {
+ $current = new stdClass;
+ $current->updates = array();
+ $current->version_checked = $wp_version;
+ }
+
+ // Wait 60 seconds between multiple version check requests
+ $timeout = 60;
+ $time_not_changed = isset( $current->last_checked ) && $timeout > ( time() - $current->last_checked );
+ if ( $time_not_changed )
+ return false;
+
+ $locale = apply_filters( 'core_version_check_locale', get_locale() );
+
+ // Update last_checked for current to prevent multiple blocking requests if request hangs
+ $current->last_checked = time();
+ set_site_transient( 'update_core', $current );
+
+ if ( method_exists( $wpdb, 'db_version' ) )
+ $mysql_version = preg_replace('/[^0-9.].*/', '', $wpdb->db_version());
+ else
+ $mysql_version = 'N/A';
+
+ if ( is_multisite( ) ) {
+ $user_count = get_user_count( );
+ $num_blogs = get_blog_count( );
+ $wp_install = network_site_url( );
+ $multisite_enabled = 1;
+ } else {
+ $user_count = count_users( );
+ $user_count = $user_count['total_users'];
+ $multisite_enabled = 0;
+ $num_blogs = 1;
+ $wp_install = home_url( '/' );
+ }
+
+ $query = array(
+ 'version' => $wp_version,
+ 'php' => $php_version,
+ 'locale' => $locale,
+ 'mysql' => $mysql_version,
+ 'local_package' => isset( $wp_local_package ) ? $wp_local_package : '',
+ 'blogs' => $num_blogs,
+ 'users' => $user_count,
+ 'multisite_enabled' => $multisite_enabled
+ );
+
+ $url = 'http://api.wordpress.org/core/version-check/1.6/?' . http_build_query( $query, null, '&' );
+
+ $options = array(
+ 'timeout' => ( ( defined('DOING_CRON') && DOING_CRON ) ? 30 : 3 ),
+ 'user-agent' => 'WordPress/' . $wp_version . '; ' . home_url( '/' ),
+ 'headers' => array(
+ 'wp_install' => $wp_install,
+ 'wp_blog' => home_url( '/' )
+ )
+ );
+
+ $response = wp_remote_get($url, $options);
+
+ if ( is_wp_error( $response ) || 200 != wp_remote_retrieve_response_code( $response ) )
+ return false;
+
+ $body = trim( wp_remote_retrieve_body( $response ) );
+ $body = maybe_unserialize( $body );
+
+ if ( ! is_array( $body ) || ! isset( $body['offers'] ) )
+ return false;
+
+ $offers = $body['offers'];
+
+ foreach ( $offers as &$offer ) {
+ foreach ( $offer as $offer_key => $value ) {
+ if ( 'packages' == $offer_key )
+ $offer['packages'] = (object) array_intersect_key( array_map( 'esc_url', $offer['packages'] ),
+ array_fill_keys( array( 'full', 'no_content', 'new_bundled', 'partial' ), '' ) );
+ elseif ( 'download' == $offer_key )
+ $offer['download'] = esc_url( $value );
+ else
+ $offer[ $offer_key ] = esc_html( $value );
+ }
+ $offer = (object) array_intersect_key( $offer, array_fill_keys( array( 'response', 'download', 'locale',
+ 'packages', 'current', 'php_version', 'mysql_version', 'new_bundled', 'partial_version' ), '' ) );
+ }
+
+ $updates = new stdClass();
+ $updates->updates = $offers;
+ $updates->last_checked = time();
+ $updates->version_checked = $wp_version;
+ set_site_transient( 'update_core', $updates);
+}
+
+/**
+ * Check plugin versions against the latest versions hosted on WordPress.org.
+ *
+ * The WordPress version, PHP version, and Locale is sent along with a list of
+ * all plugins installed. Checks against the WordPress server at
+ * api.wordpress.org. Will only check if WordPress isn't installing.
+ *
+ * @package WordPress
+ * @since 2.3.0
+ * @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_plugins() {
+ include ABSPATH . WPINC . '/version.php'; // include an unmodified $wp_version
+
+ if ( defined('WP_INSTALLING') )
+ return false;
+
+ // If running blog-side, bail unless we've not checked in the last 12 hours
+ if ( !function_exists( 'get_plugins' ) )
+ require_once( ABSPATH . 'wp-admin/includes/plugin.php' );
+
+ $plugins = get_plugins();
+ $active = get_option( 'active_plugins', array() );
+ $current = get_site_transient( 'update_plugins' );
+ if ( ! is_object($current) )
+ $current = new stdClass;
+
+ $new_option = new stdClass;
+ $new_option->last_checked = time();
+
+ // 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-plugins.php' :
+ case 'load-update.php' :
+ $timeout = HOUR_IN_SECONDS;
+ break;
+ default :
+ $timeout = 12 * HOUR_IN_SECONDS;
+ }
+
+ $time_not_changed = isset( $current->last_checked ) && $timeout > ( time() - $current->last_checked );
+
+ if ( $time_not_changed ) {
+ $plugin_changed = false;
+ foreach ( $plugins as $file => $p ) {
+ $new_option->checked[ $file ] = $p['Version'];
+
+ if ( !isset( $current->checked[ $file ] ) || strval($current->checked[ $file ]) !== strval($p['Version']) )
+ $plugin_changed = true;
+ }
+
+ if ( isset ( $current->response ) && is_array( $current->response ) ) {
+ foreach ( $current->response as $plugin_file => $update_details ) {
+ if ( ! isset($plugins[ $plugin_file ]) ) {
+ $plugin_changed = true;
+ break;
+ }
+ }
+ }
+
+ // Bail if we've checked recently and if nothing has changed
+ if ( ! $plugin_changed )
+ return false;
+ }
+
+ // 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