HTML Examples/WP.iso/wordpress/wp-includes/update.php

PHP Script | 2018-02-06 | 24.1 KB | 763 lines

<?php
/**
 * A simple set of functions to check our version 1.0 update service.
 *
 * @package WordPress
 * @since 2.3.0
 */

/**
 * Check WordPress version against the newest version.
 *
 * The WordPress version, PHP version, and Locale is sent. Checks against the
 * WordPress server at api.wordpress.org server. Will only check if WordPress
 * isn't installing.
 *
 * @since 2.3.0
 * @global string $wp_version Used to check against the newest WordPress version.
 * @global wpdb   $wpdb
 * @global string $wp_local_package
 *
 * @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.
 */
function wp_version_check( $extra_stats = array(), $force_check = false ) {
    if ( wp_installing() ) {
        return;
    }

    global $wpdb, $wp_local_package;
    // include an unmodified $wp_version
    include( ABSPATH . WPINC . '/version.php' );
    $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;
    }

    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;
    }

    /**
     * Filters the locale requested for WordPress core translations.
     *
     * @since 2.8.0
     *
     * @param string $locale Current locale.
     */
    $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,
        'initial_db_version' => get_site_option( 'initial_db_version' ),
    );

    /**
     * Filter the query arguments sent as part of the core version check.
     *
     * WARNING: Changing this data may result in your site not receiving security updates.
     * Please exercise extreme caution.
     *
     * @since 4.9.0
     *
     * @param array $query {
     *     Version check query arguments.
     *
     *     @type string $version            WordPress version number.
     *     @type string $php                PHP version number.
     *     @type string $locale             The locale to retrieve updates for.
     *     @type string $mysql              MySQL version number.
     *     @type string $local_package      The value of the $wp_local_package global, when set.
     *     @type int    $blogs              Number of sites on this WordPress installation.
     *     @type int    $users              Number of users on this WordPress installation.
     *     @type int    $multisite_enabled  Whether this WordPress installation uses Multisite.
     *     @type int    $initial_db_version Database version of WordPress at time of installation.
     * }
     */
    $query = apply_filters( 'core_version_check_query_args', $query );

    $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' );

    $doing_cron = wp_doing_cron();

    $options = array(
        'timeout' => $doing_cron ? 30 : 3,
        'user-agent' => 'WordPress/' . $wp_version . '; ' . home_url( '/' ),
        'headers' => array(
            'wp_install' => $wp_install,
            'wp_blog' => home_url( '/' )
        ),
        'body' => $post_body,
    );

    $response = wp_remote_post( $url, $options );
    if ( $ssl && is_wp_error( $response ) ) {
        trigger_error(
            sprintf(
                /* translators: %s: support forums URL */
                __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the <a href="%s">support forums</a>.' ),
                __( 'https://wordpress.org/support/' )
            ) . ' ' . __( '(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 ) || 200 != wp_remote_retrieve_response_code( $response ) ) {
        return;
    }

    $body = trim( wp_remote_retrieve_body( $response ) );
    $body = json_decode( $body, true );

    if ( ! is_array( $body ) || ! isset( $body['offers'] ) ) {
        return;
    }

    $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 = $offers;
    $updates->last_checked = time();
    $updates->version_checked = $wp_version;

    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 background updates if running non-interactively, and we weren't called from the update handler.
    if ( $doing_cron && ! doing_action( 'wp_maybe_auto_update' ) ) {
        do_action( 'wp_maybe_auto_update' );
    }
}

/**
 * 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.
 *
 * @since 2.3.0
 * @global string $wp_version Used to notify the WordPress version.
 *
 * @param array $extra_stats Extra statistics to report to the WordPress.org API.
 */
function wp_update_plugins( $extra_stats = array() ) {
    if ( wp_installing() ) {
        return;
    }

    // include an unmodified $wp_version
    include( ABSPATH . WPINC . '/version.php' );

    // 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();
    $translations = wp_get_installed_translations( '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();

    $doing_cron = wp_doing_cron();

    // 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 ( $doing_cron ) {
                $timeout = 2 * HOUR_IN_SECONDS;
            } else {
                $timeout = 12 * HOUR_IN_SECONDS;
            }
    }

    $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;
        }

        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;
        }
    }

    // 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 = compact( 'plugins', 'active' );

    $locales = array_values( get_available_languages() );

    /**
     * Filters the locales requested for plugin translations.
     *
     * @since 3.7.0
     * @since 4.5.0 The default value of the `$locales` parameter changed to include all locales.
     *
     * @param array $locales Plugin locales. Default is all available locales of the site.
     */
    $locales = apply_filters( 'plugins_update_check_locales', $locales );
    $locales = array_unique( $locales );

    if ( $doing_cron ) {
        $timeout = 30;
    } else {
        // Three seconds, plus one extra second for every 10 plugins
        $timeout = 3 + (int) ( count( $plugins ) / 10 );
    }

    $options = array(
        '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 . '; ' . home_url( '/' )
    );

    if ( $extra_stats ) {
        $options['body']['update_stats'] = wp_json_encode( $extra_stats );
    }

    $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' );

    $raw_response = wp_remote_post( $url, $options );
    if ( $ssl && is_wp_error( $raw_response ) ) {
        trigger_error(
            sprintf(
                /* translators: %s: support forums URL */
                __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the <a href="%s">support forums</a>.' ),
                __( 'https://wordpress.org/support/' )
            ) . ' ' . __( '(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;
    }

    $response = json_decode( wp_remote_retrieve_body( $raw_response ), true );
    foreach ( $response['plugins'] as &$plugin ) {
        $plugin = (object) $plugin;
        if ( isset( $plugin->compatibility ) ) {
            $plugin->compatibility = (object) $plugin->compatibility;
            foreach ( $plugin->compatibility as &$data ) {
                $data = (object) $data;
            }
        }
    }
    unset( $plugin, $data );
    foreach ( $response['no_update'] as &$plugin ) {
        $plugin = (object) $plugin;
    }
    unset( $plugin );

    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 );
}

/**
 * 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.
 *
 * @since 2.7.0
 *
 * @param array $extra_stats Extra statistics to report to the WordPress.org API.
 */
function wp_update_themes( $extra_stats = array() ) {
    if ( wp_installing() ) {
        return;
    }

    // include an unmodified $wp_version
    include( ABSPATH . WPINC . '/version.php' );

    $installed_themes = wp_get_themes();
    $translations = wp_get_installed_translations( 'themes' );

    $last_update = get_site_transient( 'update_themes' );
    if ( ! is_object($last_update) )
        $last_update = new stdClass;

    $themes = $checked = $request = array();

    // Put slug of current theme into request.
    $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(),
        );
    }

    $doing_cron = wp_doing_cron();

    // 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 ( $doing_cron ) {
                $timeout = 2 * HOUR_IN_SECONDS;
            } else {
                $timeout = 12 * HOUR_IN_SECONDS;
            }
    }

    $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;
        }

        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;
                }
            }
        }

        // Bail if we've checked recently and if nothing has changed
        if ( ! $theme_changed ) {
            return;
        }
    }

    // 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_values( get_available_languages() );

    /**
     * Filters the locales requested for theme translations.
     *
     * @since 3.7.0
     * @since 4.5.0 The default value of the `$locales` parameter changed to include all locales.
     *
     * @param array $locales Theme locales. Default is all available locales of the site.
     */
    $locales = apply_filters( 'themes_update_check_locales', $locales );
    $locales = array_unique( $locales );

    if ( $doing_cron ) {
        $timeout = 30;
    } else {
        // Three seconds, plus one extra second for every 10 themes
        $timeout = 3 + (int) ( count( $themes ) / 10 );
    }

    $options = array(
        'timeout' => $timeout,
        'body' => array(
            'themes'       => wp_json_encode( $request ),
            'translations' => wp_json_encode( $translations ),
            'locale'       => wp_json_encode( $locales ),
        ),
        'user-agent'    => 'WordPress/' . $wp_version . '; ' . home_url( '/' )
    );

    if ( $extra_stats ) {
        $options['body']['update_stats'] = wp_json_encode( $extra_stats );
    }

    $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' );

    $raw_response = wp_remote_post( $url, $options );
    if ( $ssl && is_wp_error( $raw_response ) ) {
        trigger_error(
            sprintf(
                /* translators: %s: support forums URL */
                __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the <a href="%s">support forums</a>.' ),
                __( 'https://wordpress.org/support/' )
            ) . ' ' . __( '(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;
    }

    $new_update = new stdClass;
    $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
 *
 * @return array
 */
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'] ) {
        /* translators: 1: Number of updates available to WordPress */
        $titles['wordpress'] = sprintf( __( '%d WordPress Update'), $counts['wordpress'] );
    }
    if ( $counts['plugins'] ) {
        /* translators: 1: Number of updates available to plugins */
        $titles['plugins'] = sprintf( _n( '%d Plugin Update', '%d Plugin Updates', $counts['plugins'] ), $counts['plugins'] );
    }
    if ( $counts['themes'] ) {
        /* translators: 1: Number of updates available to 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 );
    /**
     * Filters 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 );
}

/**
 * Determines whether core should be updated.
 *
 * @since 2.8.0
 *
 * @global string $wp_version
 */
function _maybe_update_core() {
    // include an unmodified $wp_version
    include( ABSPATH . WPINC . '/version.php' );

    $current = get_site_transient( 'update_core' );

    if ( isset( $current->last_checked, $current->version_checked ) &&
        12 * HOUR_IN_SECONDS > ( time() - $current->last_checked ) &&
        $current->version_checked == $wp_version ) {
        return;
    }
    wp_version_check();
}
/**
 * Check the last time plugins were run before checking plugin versions.
 *
 * This might have been backported to WordPress 2.6.1 for performance reasons.
 * This is used for the wp-admin to check only so often instead of every page
 * load.
 *
 * @since 2.7.0
 * @access private
 */
function _maybe_update_plugins() {
    $current = get_site_transient( 'update_plugins' );
    if ( isset( $current->last_checked ) && 12 * HOUR_IN_SECONDS > ( time() - $current->last_checked ) )
        return;
    wp_update_plugins();
}

/**
 * Check themes versions only after a duration of time.
 *
 * This is for performance reasons to make sure that on the theme version
 * checker is not run on every page load.
 *
 * @since 2.7.0
 * @access private
 */
function _maybe_update_themes() {
    $current = get_site_transient( 'update_themes' );
    if ( isset( $current->last_checked ) && 12 * HOUR_IN_SECONDS > ( time() - $current->last_checked ) )
        return;
    wp_update_themes();
}

/**
 * Schedule core, theme, and plugin update checks.
 *
 * @since 3.1.0
 */
function wp_schedule_update_checks() {
    if ( ! wp_next_scheduled( 'wp_version_check' ) && ! wp_installing() )
        wp_schedule_event(time(), 'twicedaily', 'wp_version_check');

    if ( ! wp_next_scheduled( 'wp_update_plugins' ) && ! wp_installing() )
        wp_schedule_event(time(), 'twicedaily', 'wp_update_plugins');

    if ( ! wp_next_scheduled( 'wp_update_themes' ) && ! wp_installing() )
        wp_schedule_event(time(), 'twicedaily', 'wp_update_themes');
}

/**
 * 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_themes_cache();
    delete_site_transient( 'update_core' );
}

if ( ( ! is_main_site() && ! is_network_admin() ) || wp_doing_ajax() ) {
    return;
}

add_action( 'admin_init', '_maybe_update_core' );
add_action( 'wp_version_check', 'wp_version_check' );

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( '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( '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' );