* Filters the array of protected Ajax actions.
* This filter is only fired when doing Ajax and the Ajax request has an 'action' property.
* @param string[] $actions_to_protect Array of strings with Ajax actions to protect.
$actions_to_protect = (array) apply_filters( 'wp_protected_ajax_actions', $actions_to_protect );
if ( ! in_array( $_REQUEST['action'], $actions_to_protect, true ) ) {
* In most cases the default internal encoding is latin1, which is
* of no use, since we want to use the `mb_` functions for `utf-8` strings.
function wp_set_internal_encoding() {
if ( function_exists( 'mb_internal_encoding' ) ) {
$charset = get_option( 'blog_charset' );
// phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged
if ( ! $charset || ! @mb_internal_encoding( $charset ) ) {
mb_internal_encoding( 'UTF-8' );
* Add magic quotes to `$_GET`, `$_POST`, `$_COOKIE`, and `$_SERVER`.
* Also forces `$_REQUEST` to be `$_GET + $_POST`. If `$_SERVER`,
* `$_COOKIE`, or `$_ENV` are needed, use those superglobals directly.
function wp_magic_quotes() {
$_GET = add_magic_quotes( $_GET );
$_POST = add_magic_quotes( $_POST );
$_COOKIE = add_magic_quotes( $_COOKIE );
$_SERVER = add_magic_quotes( $_SERVER );
// Force REQUEST to be GET + POST.
$_REQUEST = array_merge( $_GET, $_POST );
* Runs just before PHP shuts down execution.
function shutdown_action_hook() {
* Fires just before PHP shuts down execution.
* @param object $object The object to clone.
* @return object The cloned object.
function wp_clone( $object ) {
// Use parens for clone to accommodate PHP 4. See #17880.
* Determines whether the current request is for an administrative interface page.
* Does not check if the user is an administrator; use current_user_can()
* for checking roles and capabilities.
* For more information on this and similar theme functions, check out
* the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
* Conditional Tags} article in the Theme Developer Handbook.
* @global WP_Screen $current_screen WordPress current screen object.
* @return bool True if inside WordPress administration interface, false otherwise.
if ( isset( $GLOBALS['current_screen'] ) ) {
return $GLOBALS['current_screen']->in_admin();
} elseif ( defined( 'WP_ADMIN' ) ) {
* Whether the current request is for a site's administrative interface.
* Does not check if the user is an administrator; use current_user_can()
* for checking roles and capabilities.
* @global WP_Screen $current_screen WordPress current screen object.
* @return bool True if inside WordPress blog administration pages.
function is_blog_admin() {
if ( isset( $GLOBALS['current_screen'] ) ) {
return $GLOBALS['current_screen']->in_admin( 'site' );
} elseif ( defined( 'WP_BLOG_ADMIN' ) ) {
* Whether the current request is for the network administrative interface.
* e.g. `/wp-admin/network/`
* Does not check if the user is an administrator; use current_user_can()
* for checking roles and capabilities.
* Does not check if the site is a Multisite network; use is_multisite()
* for checking if Multisite is enabled.
* @global WP_Screen $current_screen WordPress current screen object.
* @return bool True if inside WordPress network administration pages.
function is_network_admin() {
if ( isset( $GLOBALS['current_screen'] ) ) {
return $GLOBALS['current_screen']->in_admin( 'network' );
} elseif ( defined( 'WP_NETWORK_ADMIN' ) ) {
* Whether the current request is for a user admin screen.
* Does not check if the user is an administrator; use current_user_can()
* for checking roles and capabilities.
* @global WP_Screen $current_screen WordPress current screen object.
* @return bool True if inside WordPress user administration pages.
function is_user_admin() {
if ( isset( $GLOBALS['current_screen'] ) ) {
return $GLOBALS['current_screen']->in_admin( 'user' );
} elseif ( defined( 'WP_USER_ADMIN' ) ) {
* If Multisite is enabled.
* @return bool True if Multisite is enabled, false otherwise.
function is_multisite() {
if ( defined( 'MULTISITE' ) ) {
if ( defined( 'SUBDOMAIN_INSTALL' ) || defined( 'VHOST' ) || defined( 'SUNRISE' ) ) {
* Retrieve the current site ID.
function get_current_blog_id() {
return absint( $blog_id );
* Retrieves the current network ID.
* @return int The ID of the current network.
function get_current_network_id() {
if ( ! is_multisite() ) {
$current_network = get_network();
if ( ! isset( $current_network->id ) ) {
return get_main_network_id();
return absint( $current_network->id );
* Attempt an early load of translations.
* Used for errors encountered during the initial loading process, before
* the locale has been properly detected and loaded.
* Designed for unusual load sequences (like setup-config.php) or for when
* the script will then terminate with an error, otherwise there is a risk
* that a file can be double-included.
* @global WP_Locale $wp_locale WordPress date and time locale object.
function wp_load_translations_early() {
if ( function_exists( 'did_action' ) && did_action( 'init' ) ) {
// We need $wp_local_package.
require ABSPATH . WPINC . '/version.php';
// Translation and localization.
require_once ABSPATH . WPINC . '/pomo/mo.php';
require_once ABSPATH . WPINC . '/l10n.php';
require_once ABSPATH . WPINC . '/class-wp-locale.php';
require_once ABSPATH . WPINC . '/class-wp-locale-switcher.php';
require_once ABSPATH . WPINC . '/plugin.php';
if ( defined( 'WPLANG' ) ) {
if ( isset( $wp_local_package ) ) {
$locales[] = $wp_local_package;
if ( defined( 'WP_LANG_DIR' ) && @is_dir( WP_LANG_DIR ) ) {
$locations[] = WP_LANG_DIR;
if ( defined( 'WP_CONTENT_DIR' ) && @is_dir( WP_CONTENT_DIR . '/languages' ) ) {
$locations[] = WP_CONTENT_DIR . '/languages';
if ( @is_dir( ABSPATH . 'wp-content/languages' ) ) {
$locations[] = ABSPATH . 'wp-content/languages';
if ( @is_dir( ABSPATH . WPINC . '/languages' ) ) {
$locations[] = ABSPATH . WPINC . '/languages';
$locations = array_unique( $locations );
foreach ( $locales as $locale ) {
foreach ( $locations as $location ) {
if ( file_exists( $location . '/' . $locale . '.mo' ) ) {
load_textdomain( 'default', $location . '/' . $locale . '.mo' );
if ( defined( 'WP_SETUP_CONFIG' ) && file_exists( $location . '/admin-' . $locale . '.mo' ) ) {
load_textdomain( 'default', $location . '/admin-' . $locale . '.mo' );
$wp_locale = new WP_Locale();
* Check or set whether WordPress is in "installation" mode.
* If the `WP_INSTALLING` constant is defined during the bootstrap, `wp_installing()` will default to `true`.
* @param bool $is_installing Optional. True to set WP into Installing mode, false to turn Installing mode off.
* Omit this parameter if you only want to fetch the current status.
* @return bool True if WP is installing, otherwise false. When a `$is_installing` is passed, the function will
* report whether WP was in installing mode prior to the change to `$is_installing`.
function wp_installing( $is_installing = null ) {
static $installing = null;
// Support for the `WP_INSTALLING` constant, defined before WP is loaded.
if ( is_null( $installing ) ) {
$installing = defined( 'WP_INSTALLING' ) && WP_INSTALLING;
if ( ! is_null( $is_installing ) ) {
$old_installing = $installing;
$installing = $is_installing;
return (bool) $old_installing;
return (bool) $installing;
* Determines if SSL is used.
* @since 4.6.0 Moved from functions.php to load.php.
* @return bool True if SSL, otherwise false.
if ( isset( $_SERVER['HTTPS'] ) ) {
if ( 'on' === strtolower( $_SERVER['HTTPS'] ) ) {
if ( '1' == $_SERVER['HTTPS'] ) {
} elseif ( isset( $_SERVER['SERVER_PORT'] ) && ( '443' == $_SERVER['SERVER_PORT'] ) ) {
* Converts a shorthand byte value to an integer byte value.
* @since 4.6.0 Moved from media.php to load.php.
* @link https://www.php.net/manual/en/function.ini-get.php
* @link https://www.php.net/manual/en/faq.using.php#faq.using.shorthandbytes
* @param string $value A (PHP ini) byte value, either shorthand or ordinary.
* @return int An integer byte value.
function wp_convert_hr_to_bytes( $value ) {
$value = strtolower( trim( $value ) );
if ( false !== strpos( $value, 'g' ) ) {
} elseif ( false !== strpos( $value, 'm' ) ) {
} elseif ( false !== strpos( $value, 'k' ) ) {
// Deal with large (float) values which run into the maximum integer size.
return min( $bytes, PHP_INT_MAX );
* Determines whether a PHP ini value is changeable at runtime.
* @link https://www.php.net/manual/en/function.ini-get-all.php
* @param string $setting The name of the ini setting to check.
* @return bool True if the value is changeable at runtime. False otherwise.
function wp_is_ini_value_changeable( $setting ) {
if ( ! isset( $ini_all ) ) {
// Sometimes `ini_get_all()` is disabled via the `disable_functions` option for "security purposes".
if ( function_exists( 'ini_get_all' ) ) {
$ini_all = ini_get_all();
// Bit operator to workaround https://bugs.php.net/bug.php?id=44936 which changes access level to 63 in PHP 5.2.6 - 5.2.17.
if ( isset( $ini_all[ $setting ]['access'] ) && ( INI_ALL === ( $ini_all[ $setting ]['access'] & 7 ) || INI_USER === ( $ini_all[ $setting ]['access'] & 7 ) ) ) {
// If we were unable to retrieve the details, fail gracefully to assume it's changeable.
if ( ! is_array( $ini_all ) ) {
* Determines whether the current request is a WordPress Ajax request.
* @return bool True if it's a WordPress Ajax request, false otherwise.
function wp_doing_ajax() {
* Filters whether the current request is a WordPress Ajax request.
* @param bool $wp_doing_ajax Whether the current request is a WordPress Ajax request.
return apply_filters( 'wp_doing_ajax', defined( 'DOING_AJAX' ) && DOING_AJAX );
* Determines whether the current request should use themes.
* @return bool True if themes should be used, false otherwise.
function wp_using_themes() {
* Filters whether the current request should use themes.
* @param bool $wp_using_themes Whether the current request should use themes.
return apply_filters( 'wp_using_themes', defined( 'WP_USE_THEMES' ) && WP_USE_THEMES );
* Determines whether the current request is a WordPress cron request.
* @return bool True if it's a WordPress cron request, false otherwise.