X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/fef8173b8c3bad08f495551e43cfdeac1cae6021..caeaf8dc94b5e3f75dc98ec92dc7b76049cdddb6:/wp-includes/update.php

diff --git a/wp-includes/update.php b/wp-includes/update.php
index 1f9f2a9a..a32b1e88 100644
--- a/wp-includes/update.php
+++ b/wp-includes/update.php
@@ -13,27 +13,52 @@
  * WordPress server at api.wordpress.org server. Will only check if WordPress
  * isn't installing.
  *
- * @package WordPress
  * @since 2.3.0
  * @uses $wp_version Used to check against the newest WordPress version.
  *
- * @return mixed Returns null if update is unsupported. Returns false if check is too soon.
+ * @param array $extra_stats Extra statistics to report to the WordPress.org API.
+ * @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.
+ * @return null|false Returns null if update is unsupported. Returns false if check is too soon.
  */
-function wp_version_check() {
+function wp_version_check( $extra_stats = array(), $force_check = false ) {
 	if ( defined('WP_INSTALLING') )
 		return;
 
-	global $wp_version, $wpdb, $wp_local_package;
+	global $wpdb, $wp_local_package;
+	include( ABSPATH . WPINC . '/version.php' ); // include an unmodified $wp_version
 	$php_version = phpversion();
 
 	$current = get_site_transient( 'update_core' );
+	$translations = wp_get_installed_translations( 'core' );
+
+	// Invalidate the transient when $wp_version changes
+	if ( is_object( $current ) && $wp_version != $current->version_checked )
+		$current = false;
+
 	if ( ! is_object($current) ) {
 		$current = new stdClass;
 		$current->updates = array();
 		$current->version_checked = $wp_version;
 	}
 
-	$locale = apply_filters( 'core_version_check_locale', get_locale() );
+	if ( ! empty( $extra_stats ) )
+		$force_check = true;
+
+	// Wait 60 seconds between multiple version check requests
+	$timeout = 60;
+	$time_not_changed = isset( $current->last_checked ) && $timeout > ( time() - $current->last_checked );
+	if ( ! $force_check && $time_not_changed )
+		return false;
+
+	$locale = get_locale();
+	/**
+	 * Filter the locale requested for WordPress core translations.
+	 *
+	 * @since 2.8.0
+	 *
+	 * @param string $locale Current locale.
+	 */
+	$locale = apply_filters( 'core_version_check_locale', $locale );
 
 	// Update last_checked for current to prevent multiple blocking requests if request hangs
 	$current->last_checked = time();
@@ -44,20 +69,40 @@ function wp_version_check() {
 	else
 		$mysql_version = 'N/A';
 
-	if ( is_multisite( ) ) {
-		$user_count = get_user_count( );
-		$num_blogs = get_blog_count( );
-		$wp_install = network_site_url( );
+	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 = count_users();
+		$user_count = $user_count['total_users'];
 		$multisite_enabled = 0;
 		$num_blogs = 1;
 		$wp_install = home_url( '/' );
 	}
 
-	$local_package = isset( $wp_local_package )? $wp_local_package : '';
-	$url = "http://api.wordpress.org/core/version-check/1.5/?version=$wp_version&php=$php_version&locale=$locale&mysql=$mysql_version&local_package=$local_package&blogs=$num_blogs&users={$user_count['total_users']}&multisite_enabled=$multisite_enabled";
+	$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,
+	);
+
+	$post_body = array(
+		'translations' => wp_json_encode( $translations ),
+	);
+
+	if ( is_array( $extra_stats ) )
+		$post_body = array_merge( $post_body, $extra_stats );
+
+	$url = $http_url = 'http://api.wordpress.org/core/version-check/1.7/?' . http_build_query( $query, null, '&' );
+	if ( $ssl = wp_http_supports( array( 'ssl' ) ) )
+		$url = set_url_scheme( $url, 'https' );
 
 	$options = array(
 		'timeout' => ( ( defined('DOING_CRON') && DOING_CRON ) ? 30 : 3 ),
@@ -65,44 +110,63 @@ function wp_version_check() {
 		'headers' => array(
 			'wp_install' => $wp_install,
 			'wp_blog' => home_url( '/' )
-		)
+		),
+		'body' => $post_body,
 	);
 
-	$response = wp_remote_get($url, $options);
+	$response = wp_remote_post( $url, $options );
+	if ( $ssl && is_wp_error( $response ) ) {
+		trigger_error( __( '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="https://wordpress.org/support/">support forums</a>.' ) . ' ' . __( '(WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.)' ), headers_sent() || WP_DEBUG ? E_USER_WARNING : E_USER_NOTICE );
+		$response = wp_remote_post( $http_url, $options );
+	}
 
-	if ( is_wp_error( $response ) )
+	if ( is_wp_error( $response ) || 200 != wp_remote_retrieve_response_code( $response ) )
 		return false;
 
-	if ( 200 != $response['response']['code'] )
+	$body = trim( wp_remote_retrieve_body( $response ) );
+	$body = json_decode( $body, true );
+
+	if ( ! is_array( $body ) || ! isset( $body['offers'] ) )
 		return false;
 
-	$body = trim( $response['body'] );
-	$body = str_replace(array("\r\n", "\r"), "\n", $body);
-	$new_options = array();
-	foreach ( explode( "\n\n", $body ) as $entry ) {
-		$returns = explode("\n", $entry);
-		$new_option = new stdClass();
-		$new_option->response = esc_attr( $returns[0] );
-		if ( isset( $returns[1] ) )
-			$new_option->url = esc_url( $returns[1] );
-		if ( isset( $returns[2] ) )
-			$new_option->package = esc_url( $returns[2] );
-		if ( isset( $returns[3] ) )
-			$new_option->current = esc_attr( $returns[3] );
-		if ( isset( $returns[4] ) )
-			$new_option->locale = esc_attr( $returns[4] );
-		if ( isset( $returns[5] ) )
-			$new_option->php_version = esc_attr( $returns[5] );
-		if ( isset( $returns[6] ) )
-			$new_option->mysql_version = esc_attr( $returns[6] );
-		$new_options[] = $new_option;
+	$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', 'rollback' ), '' ) );
+			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', 'version', 'php_version', 'mysql_version', 'new_bundled', 'partial_version', 'notify_email', 'support_email', 'new_files' ), '' ) );
 	}
 
 	$updates = new stdClass();
-	$updates->updates = $new_options;
+	$updates->updates = $offers;
 	$updates->last_checked = time();
 	$updates->version_checked = $wp_version;
-	set_site_transient( 'update_core',  $updates);
+
+	if ( isset( $body['translations'] ) )
+		$updates->translations = $body['translations'];
+
+	set_site_transient( 'update_core', $updates );
+
+	if ( ! empty( $body['ttl'] ) ) {
+		$ttl = (int) $body['ttl'];
+		if ( $ttl && ( time() + $ttl < wp_next_scheduled( 'wp_version_check' ) ) ) {
+			// Queue an event to re-run the update check in $ttl seconds.
+			wp_schedule_single_event( time() + $ttl, 'wp_version_check' );
+		}
+	}
+
+	// Trigger a background updates check if running non-interactively, and we weren't called from the update handler.
+	if ( defined( 'DOING_CRON' ) && DOING_CRON && ! doing_action( 'wp_maybe_auto_update' ) ) {
+		do_action( 'wp_maybe_auto_update' );
+	}
 }
 
 /**
@@ -112,14 +176,14 @@ function wp_version_check() {
  * 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.
+ * @param array $extra_stats Extra statistics to report to the WordPress.org API.
+ * @return false|null Returns null if update is unsupported. Returns false if check is too soon.
  */
-function wp_update_plugins() {
-	global $wp_version;
+function wp_update_plugins( $extra_stats = array() ) {
+	include( ABSPATH . WPINC . '/version.php' ); // include an unmodified $wp_version
 
 	if ( defined('WP_INSTALLING') )
 		return false;
@@ -129,6 +193,8 @@ function wp_update_plugins() {
 		require_once( ABSPATH . 'wp-admin/includes/plugin.php' );
 
 	$plugins = get_plugins();
+	$translations = wp_get_installed_translations( 'plugins' );
+
 	$active  = get_option( 'active_plugins', array() );
 	$current = get_site_transient( 'update_plugins' );
 	if ( ! is_object($current) )
@@ -136,56 +202,123 @@ function wp_update_plugins() {
 
 	$new_option = new stdClass;
 	$new_option->last_checked = time();
-	$timeout = 'load-plugins.php' == current_filter() ? 3600 : 43200; //Check for updated every 60 minutes if hitting the themes page, Else, check every 12 hours
-	$time_not_changed = isset( $current->last_checked ) && $timeout > ( time() - $current->last_checked );
-
-	$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;
+	// Check for update on a different schedule, depending on the page.
+	switch ( current_filter() ) {
+		case 'upgrader_process_complete' :
+			$timeout = 0;
+			break;
+		case 'load-update-core.php' :
+			$timeout = MINUTE_IN_SECONDS;
+			break;
+		case 'load-plugins.php' :
+		case 'load-update.php' :
+			$timeout = HOUR_IN_SECONDS;
+			break;
+		default :
+			if ( defined( 'DOING_CRON' ) && DOING_CRON ) {
+				$timeout = 0;
+			} else {
+				$timeout = 12 * HOUR_IN_SECONDS;
+			}
 	}
 
-	if ( isset ( $current->response ) && is_array( $current->response ) ) {
-		foreach ( $current->response as $plugin_file => $update_details ) {
-			if ( ! isset($plugins[ $plugin_file ]) ) {
+	$time_not_changed = isset( $current->last_checked ) && $timeout > ( time() - $current->last_checked );
+
+	if ( $time_not_changed && ! $extra_stats ) {
+		$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;
-				break;
+		}
+
+		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 in the last 12 hours and if nothing has changed
-	if ( $time_not_changed && !$plugin_changed )
-		return false;
+		// 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');
+	$to_send = compact( 'plugins', 'active' );
+
+	$locales = array( get_locale() );
+	/**
+	 * Filter the locales requested for plugin translations.
+	 *
+	 * @since 3.7.0
+	 *
+	 * @param array $locales Plugin locale. Default is current locale of the site.
+	 */
+	$locales = apply_filters( 'plugins_update_check_locales', $locales );
+
+	if ( defined( 'DOING_CRON' ) && DOING_CRON ) {
+		$timeout = 30;
+	} else {
+		// Three seconds, plus one extra second for every 10 plugins
+		$timeout = 3 + (int) ( count( $plugins ) / 10 );
+	}
 
 	$options = array(
-		'timeout' => ( ( defined('DOING_CRON') && DOING_CRON ) ? 30 : 3),
-		'body' => array( 'plugins' => serialize( $to_send ) ),
+		'timeout' => $timeout,
+		'body' => array(
+			'plugins'      => wp_json_encode( $to_send ),
+			'translations' => wp_json_encode( $translations ),
+			'locale'       => wp_json_encode( $locales ),
+			'all'          => wp_json_encode( true ),
+		),
 		'user-agent' => 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' )
 	);
 
-	$raw_response = wp_remote_post('http://api.wordpress.org/plugins/update-check/1.0/', $options);
+	if ( $extra_stats ) {
+		$options['body']['update_stats'] = wp_json_encode( $extra_stats );
+	}
 
-	if ( is_wp_error( $raw_response ) )
-		return false;
+	$url = $http_url = 'http://api.wordpress.org/plugins/update-check/1.1/';
+	if ( $ssl = wp_http_supports( array( 'ssl' ) ) )
+		$url = set_url_scheme( $url, 'https' );
 
-	if ( 200 != $raw_response['response']['code'] )
+	$raw_response = wp_remote_post( $url, $options );
+	if ( $ssl && is_wp_error( $raw_response ) ) {
+		trigger_error( __( '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="https://wordpress.org/support/">support forums</a>.' ) . ' ' . __( '(WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.)' ), headers_sent() || WP_DEBUG ? E_USER_WARNING : E_USER_NOTICE );
+		$raw_response = wp_remote_post( $http_url, $options );
+	}
+
+	if ( is_wp_error( $raw_response ) || 200 != wp_remote_retrieve_response_code( $raw_response ) )
 		return false;
 
-	$response = unserialize( $raw_response['body'] );
+	$response = json_decode( wp_remote_retrieve_body( $raw_response ), true );
+	foreach ( $response['plugins'] as &$plugin ) {
+		$plugin = (object) $plugin;
+	}
+	unset( $plugin );
+	foreach ( $response['no_update'] as &$plugin ) {
+		$plugin = (object) $plugin;
+	}
+	unset( $plugin );
 
-	if ( false !== $response )
-		$new_option->response = $response;
-	else
+	if ( is_array( $response ) ) {
+		$new_option->response = $response['plugins'];
+		$new_option->translations = $response['translations'];
+		// TODO: Perhaps better to store no_update in a separate transient with an expiry?
+		$new_option->no_update = $response['no_update'];
+	} else {
 		$new_option->response = array();
+		$new_option->translations = array();
+		$new_option->no_update = array();
+	}
 
 	set_site_transient( 'update_plugins', $new_option );
 }
@@ -197,105 +330,254 @@ function wp_update_plugins() {
  * 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.
+ * @param array $extra_stats Extra statistics to report to the WordPress.org API.
+ * @return false|null Returns null if update is unsupported. Returns false if check is too soon.
  */
-function wp_update_themes( ) {
-	global $wp_version;
+function wp_update_themes( $extra_stats = array() ) {
+	include( ABSPATH . WPINC . '/version.php' ); // include an unmodified $wp_version
 
 	if ( defined( 'WP_INSTALLING' ) )
 		return false;
 
-	if ( !function_exists( 'get_themes' ) )
-		require_once( ABSPATH . 'wp-includes/theme.php' );
+	$installed_themes = wp_get_themes();
+	$translations = wp_get_installed_translations( 'themes' );
 
-	$installed_themes = get_themes( );
 	$last_update = get_site_transient( 'update_themes' );
 	if ( ! is_object($last_update) )
 		$last_update = new stdClass;
 
-	$timeout = 'load-themes.php' == current_filter() ? 3600 : 43200; //Check for updated every 60 minutes if hitting the themes page, Else, check every 12 hours
-	$time_not_changed = isset( $last_update->last_checked ) && $timeout > ( time( ) - $last_update->last_checked );
-
-	$themes = array();
-	$checked = array();
-	$exclude_fields = array('Template Files', 'Stylesheet Files', 'Status', 'Theme Root', 'Theme Root URI', 'Template Dir', 'Stylesheet Dir', 'Description', 'Tags', 'Screenshot');
+	$themes = $checked = $request = array();
 
 	// Put slug of current theme into request.
-	$themes['current_theme'] = get_option( 'stylesheet' );
-
-	foreach ( (array) $installed_themes as $theme_title => $theme ) {
-		$themes[$theme['Stylesheet']] = array();
-		$checked[$theme['Stylesheet']] = $theme['Version'];
-
-		$themes[$theme['Stylesheet']]['Name'] = $theme['Name'];
-		$themes[$theme['Stylesheet']]['Version'] = $theme['Version'];
-
-		foreach ( (array) $theme as $key => $value ) {
-			if ( !in_array($key, $exclude_fields) )
-				$themes[$theme['Stylesheet']][$key] = $value;
-		}
+	$request['active'] = 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(),
+		);
 	}
 
-	$theme_changed = false;
-	foreach ( $checked as $slug => $v ) {
-		$update_request->checked[ $slug ] = $v;
-
-		if ( !isset( $last_update->checked[ $slug ] ) || strval($last_update->checked[ $slug ]) !== strval($v) )
-			$theme_changed = true;
+	// Check for update on a different schedule, depending on the page.
+	switch ( current_filter() ) {
+		case 'upgrader_process_complete' :
+			$timeout = 0;
+			break;
+		case 'load-update-core.php' :
+			$timeout = MINUTE_IN_SECONDS;
+			break;
+		case 'load-themes.php' :
+		case 'load-update.php' :
+			$timeout = HOUR_IN_SECONDS;
+			break;
+		default :
+			if ( defined( 'DOING_CRON' ) && DOING_CRON ) {
+				$timeout = 0;
+			} else {
+				$timeout = 12 * HOUR_IN_SECONDS;
+			}
 	}
 
-	if ( isset ( $last_update->response ) && is_array( $last_update->response ) ) {
-		foreach ( $last_update->response as $slug => $update_details ) {
-			if ( ! isset($checked[ $slug ]) ) {
+	$time_not_changed = isset( $last_update->last_checked ) && $timeout > ( time() - $last_update->last_checked );
+
+	if ( $time_not_changed && ! $extra_stats ) {
+		$theme_changed = false;
+		foreach ( $checked as $slug => $v ) {
+			if ( !isset( $last_update->checked[ $slug ] ) || strval($last_update->checked[ $slug ]) !== strval($v) )
 				$theme_changed = true;
-				break;
+		}
+
+		if ( isset ( $last_update->response ) && is_array( $last_update->response ) ) {
+			foreach ( $last_update->response as $slug => $update_details ) {
+				if ( ! isset($checked[ $slug ]) ) {
+					$theme_changed = true;
+					break;
+				}
 			}
 		}
-	}
 
-	if ( $time_not_changed && !$theme_changed )
-		return false;
+		// Bail if we've checked recently and if nothing has changed
+		if ( ! $theme_changed )
+			return false;
+	}
 
 	// Update last_checked for current to prevent multiple blocking requests if request hangs
 	$last_update->last_checked = time();
 	set_site_transient( 'update_themes', $last_update );
 
+	$request['themes'] = $themes;
+
+	$locales = array( get_locale() );
+	/**
+	 * Filter the locales requested for theme translations.
+	 *
+	 * @since 3.7.0
+	 *
+	 * @param array $locales Theme locale. Default is current locale of the site.
+	 */
+	$locales = apply_filters( 'themes_update_check_locales', $locales );
+
+	if ( defined( 'DOING_CRON' ) && DOING_CRON ) {
+		$timeout = 30;
+	} else {
+		// Three seconds, plus one extra second for every 10 themes
+		$timeout = 3 + (int) ( count( $themes ) / 10 );
+	}
+
 	$options = array(
-		'timeout' => ( ( defined('DOING_CRON') && DOING_CRON ) ? 30 : 3),
-		'body'			=> array( 'themes' => serialize( $themes ) ),
+		'timeout' => $timeout,
+		'body' => array(
+			'themes'       => wp_json_encode( $request ),
+			'translations' => wp_json_encode( $translations ),
+			'locale'       => wp_json_encode( $locales ),
+		),
 		'user-agent'	=> 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' )
 	);
 
-	$raw_response = wp_remote_post( 'http://api.wordpress.org/themes/update-check/1.0/', $options );
+	if ( $extra_stats ) {
+		$options['body']['update_stats'] = wp_json_encode( $extra_stats );
+	}
 
-	if ( is_wp_error( $raw_response ) )
-		return false;
+	$url = $http_url = 'http://api.wordpress.org/themes/update-check/1.1/';
+	if ( $ssl = wp_http_supports( array( 'ssl' ) ) )
+		$url = set_url_scheme( $url, 'https' );
 
-	if ( 200 != $raw_response['response']['code'] )
+	$raw_response = wp_remote_post( $url, $options );
+	if ( $ssl && is_wp_error( $raw_response ) ) {
+		trigger_error( __( '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="https://wordpress.org/support/">support forums</a>.' ) . ' ' . __( '(WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.)' ), headers_sent() || WP_DEBUG ? E_USER_WARNING : E_USER_NOTICE );
+		$raw_response = wp_remote_post( $http_url, $options );
+	}
+
+	if ( is_wp_error( $raw_response ) || 200 != wp_remote_retrieve_response_code( $raw_response ) )
 		return false;
 
 	$new_update = new stdClass;
-	$new_update->last_checked = time( );
-	$response = unserialize( $raw_response['body'] );
-	if ( $response ) {
-		$new_update->checked = $checked;
-		$new_update->response = $response;
+	$new_update->last_checked = time();
+	$new_update->checked = $checked;
+
+	$response = json_decode( wp_remote_retrieve_body( $raw_response ), true );
+
+	if ( is_array( $response ) ) {
+		$new_update->response     = $response['themes'];
+		$new_update->translations = $response['translations'];
 	}
 
 	set_site_transient( 'update_themes', $new_update );
 }
 
+/**
+ * Performs WordPress automatic background updates.
+ *
+ * @since 3.7.0
+ */
+function wp_maybe_auto_update() {
+	include_once( ABSPATH . '/wp-admin/includes/admin.php' );
+	include_once( ABSPATH . '/wp-admin/includes/class-wp-upgrader.php' );
+
+	$upgrader = new WP_Automatic_Updater;
+	$upgrader->run();
+}
+
+/**
+ * Retrieves a list of all language updates available.
+ *
+ * @since 3.7.0
+ */
+function wp_get_translation_updates() {
+	$updates = array();
+	$transients = array( 'update_core' => 'core', 'update_plugins' => 'plugin', 'update_themes' => 'theme' );
+	foreach ( $transients as $transient => $type ) {
+
+		$transient = get_site_transient( $transient );
+		if ( empty( $transient->translations ) )
+			continue;
+
+		foreach ( $transient->translations as $translation ) {
+			$updates[] = (object) $translation;
+		}
+	}
+
+	return $updates;
+}
+
+/**
+ * Collect counts and UI strings for available updates
+ *
+ * @since 3.3.0
+ *
+ * @return array
+ */
+function wp_get_update_data() {
+	$counts = array( 'plugins' => 0, 'themes' => 0, 'wordpress' => 0, 'translations' => 0 );
+
+	if ( $plugins = current_user_can( 'update_plugins' ) ) {
+		$update_plugins = get_site_transient( 'update_plugins' );
+		if ( ! empty( $update_plugins->response ) )
+			$counts['plugins'] = count( $update_plugins->response );
+	}
+
+	if ( $themes = current_user_can( 'update_themes' ) ) {
+		$update_themes = get_site_transient( 'update_themes' );
+		if ( ! empty( $update_themes->response ) )
+			$counts['themes'] = count( $update_themes->response );
+	}
+
+	if ( ( $core = current_user_can( 'update_core' ) ) && function_exists( 'get_core_updates' ) ) {
+		$update_wordpress = get_core_updates( array('dismissed' => false) );
+		if ( ! empty( $update_wordpress ) && ! in_array( $update_wordpress[0]->response, array('development', 'latest') ) && current_user_can('update_core') )
+			$counts['wordpress'] = 1;
+	}
+
+	if ( ( $core || $plugins || $themes ) && wp_get_translation_updates() )
+		$counts['translations'] = 1;
+
+	$counts['total'] = $counts['plugins'] + $counts['themes'] + $counts['wordpress'] + $counts['translations'];
+	$titles = array();
+	if ( $counts['wordpress'] )
+		$titles['wordpress'] = sprintf( __( '%d WordPress Update'), $counts['wordpress'] );
+	if ( $counts['plugins'] )
+		$titles['plugins'] = sprintf( _n( '%d Plugin Update', '%d Plugin Updates', $counts['plugins'] ), $counts['plugins'] );
+	if ( $counts['themes'] )
+		$titles['themes'] = sprintf( _n( '%d Theme Update', '%d Theme Updates', $counts['themes'] ), $counts['themes'] );
+	if ( $counts['translations'] )
+		$titles['translations'] = __( 'Translation Updates' );
+
+	$update_title = $titles ? esc_attr( implode( ', ', $titles ) ) : '';
+
+	$update_data = array( 'counts' => $counts, 'title' => $update_title );
+	/**
+	 * Filter the returned array of update data for plugins, themes, and WordPress core.
+	 *
+	 * @since 3.5.0
+	 *
+	 * @param array $update_data {
+	 *     Fetched update data.
+	 *
+	 *     @type array   $counts       An array of counts for available plugin, theme, and WordPress updates.
+	 *     @type string  $update_title Titles of available updates.
+	 * }
+	 * @param array $titles An array of update counts and UI strings for available updates.
+	 */
+	return apply_filters( 'wp_get_update_data', $update_data, $titles );
+}
+
 function _maybe_update_core() {
-	global $wp_version;
+	include( ABSPATH . WPINC . '/version.php' ); // include an unmodified $wp_version
 
 	$current = get_site_transient( 'update_core' );
 
 	if ( isset( $current->last_checked ) &&
-		43200 > ( time() - $current->last_checked ) &&
+		12 * HOUR_IN_SECONDS > ( time() - $current->last_checked ) &&
 		isset( $current->version_checked ) &&
 		$current->version_checked == $wp_version )
 		return;
@@ -314,7 +596,7 @@ function _maybe_update_core() {
  */
 function _maybe_update_plugins() {
 	$current = get_site_transient( 'update_plugins' );
-	if ( isset( $current->last_checked ) && 43200 > ( time() - $current->last_checked ) )
+	if ( isset( $current->last_checked ) && 12 * HOUR_IN_SECONDS > ( time() - $current->last_checked ) )
 		return;
 	wp_update_plugins();
 }
@@ -328,9 +610,9 @@ function _maybe_update_plugins() {
  * @since 2.7.0
  * @access private
  */
-function _maybe_update_themes( ) {
+function _maybe_update_themes() {
 	$current = get_site_transient( 'update_themes' );
-	if ( isset( $current->last_checked ) && 43200 > ( time( ) - $current->last_checked ) )
+	if ( isset( $current->last_checked ) && 12 * HOUR_IN_SECONDS > ( time() - $current->last_checked ) )
 		return;
 
 	wp_update_themes();
@@ -350,26 +632,62 @@ function wp_schedule_update_checks() {
 
 	if ( !wp_next_scheduled('wp_update_themes') && !defined('WP_INSTALLING') )
 		wp_schedule_event(time(), 'twicedaily', 'wp_update_themes');
+
+	if ( ! wp_next_scheduled( 'wp_maybe_auto_update' ) && ! defined( 'WP_INSTALLING' ) ) {
+		// Schedule auto updates for 7 a.m. and 7 p.m. in the timezone of the site.
+		$next = strtotime( 'today 7am' );
+		$now = time();
+		// Find the next instance of 7 a.m. or 7 p.m., but skip it if it is within 3 hours from now.
+		while ( ( $now + 3 * HOUR_IN_SECONDS ) > $next ) {
+			$next += 12 * HOUR_IN_SECONDS;
+		}
+		$next = $next - get_option( 'gmt_offset' ) * HOUR_IN_SECONDS;
+		// Add a random number of minutes, so we don't have all sites trying to update exactly on the hour
+		$next = $next + rand( 0, 59 ) * MINUTE_IN_SECONDS;
+		wp_schedule_event( $next, 'twicedaily', 'wp_maybe_auto_update' );
+	}
+}
+
+/**
+ * Clear existing update caches for plugins, themes, and core.
+ *
+ * @since 4.1.0
+ */
+function wp_clean_update_cache() {
+	if ( function_exists( 'wp_clean_plugins_cache' ) ) {
+		wp_clean_plugins_cache();
+	} else {
+		delete_site_transient( 'update_plugins' );
+	}
+	wp_clean_plugins_cache();
+	wp_clean_themes_cache();
+	delete_site_transient( 'update_core' );
 }
 
-if ( ! is_main_site() )
+if ( ( ! is_main_site() && ! is_network_admin() ) || ( defined( 'DOING_AJAX' ) && DOING_AJAX ) ) {
 	return;
+}
 
 add_action( 'admin_init', '_maybe_update_core' );
 add_action( 'wp_version_check', 'wp_version_check' );
+add_action( 'upgrader_process_complete', 'wp_version_check', 10, 0 );
 
 add_action( 'load-plugins.php', 'wp_update_plugins' );
 add_action( 'load-update.php', 'wp_update_plugins' );
 add_action( 'load-update-core.php', 'wp_update_plugins' );
 add_action( 'admin_init', '_maybe_update_plugins' );
 add_action( 'wp_update_plugins', 'wp_update_plugins' );
+add_action( 'upgrader_process_complete', 'wp_update_plugins', 10, 0 );
 
 add_action( 'load-themes.php', 'wp_update_themes' );
 add_action( 'load-update.php', 'wp_update_themes' );
 add_action( 'load-update-core.php', 'wp_update_themes' );
 add_action( 'admin_init', '_maybe_update_themes' );
 add_action( 'wp_update_themes', 'wp_update_themes' );
+add_action( 'upgrader_process_complete', 'wp_update_themes', 10, 0 );
 
-add_action('init', 'wp_schedule_update_checks');
+add_action( 'update_option_WPLANG', 'wp_clean_update_cache' , 10, 0 );
+
+add_action( 'wp_maybe_auto_update', 'wp_maybe_auto_update' );
 
-?>
+add_action('init', 'wp_schedule_update_checks');