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<?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 WordPress database abstraction object.
* @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://api.wordpress.org/core/version-check/1.7/?' . http_build_query( $query, null, '&' );
$http_url = $url;
$ssl = wp_http_supports( array( 'ssl' ) );
if ( $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/forums/' )
) . ' ' . __( '(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' ) ) {
/**
* Fires during wp_cron, starting the auto update process.
*
* @since 3.9.0
*/
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://api.wordpress.org/plugins/update-check/1.1/';
$http_url = $url;
$ssl = wp_http_supports( array( 'ssl' ) );
if ( $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/forums/' )
) . ' ' . __( '(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 = array();
$checked = array();
$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://api.wordpress.org/themes/update-check/1.1/';
$http_url = $url;
$ssl = wp_http_supports( array( 'ssl' ) );
if ( $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/forums/' )
) . ' ' . __( '(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 object[] Array of translation objects that have available updates.
*/
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,
);
$plugins = current_user_can( 'update_plugins' );
if ( $plugins ) {
$update_plugins = get_site_transient( 'update_plugins' );
if ( ! empty( $update_plugins->response ) ) {
$counts['plugins'] = count( $update_plugins->response );
}
}
$themes = current_user_can( 'update_themes' );
if ( $themes ) {
$update_themes = get_site_transient( 'update_themes' );
if ( ! empty( $update_themes->response ) ) {
$counts['themes'] = count( $update_themes->response );
}
}
$core = current_user_can( 'update_core' );
if ( $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: %d: Number of available WordPress updates. */
$titles['wordpress'] = sprintf( __( '%d WordPress Update' ), $counts['wordpress'] );
}
if ( $counts['plugins'] ) {
/* translators: %d: Number of available plugin updates. */
$titles['plugins'] = sprintf( _n( '%d Plugin Update', '%d Plugin Updates', $counts['plugins'] ), $counts['plugins'] );
}
if ( $counts['themes'] ) {
/* translators: %d: Number of available theme updates. */
$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' );