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load.php 31.68 KiB
<?php
/**
* These functions are needed to load WordPress.
*
* @package WordPress
*/
/**
* Return the HTTP protocol sent by the server.
*
* @since 4.4.0
*
* @return string The HTTP protocol. Default: HTTP/1.0.
*/
function wp_get_server_protocol() {
$protocol = $_SERVER['SERVER_PROTOCOL'];
if ( ! in_array( $protocol, array( 'HTTP/1.1', 'HTTP/2', 'HTTP/2.0' ) ) ) {
$protocol = 'HTTP/1.0';
}
return $protocol;
}
/**
* Turn register globals off.
*
* @since 2.1.0
* @access private
*/
function wp_unregister_GLOBALS() {
if ( !ini_get( 'register_globals' ) )
return;
if ( isset( $_REQUEST['GLOBALS'] ) )
die( 'GLOBALS overwrite attempt detected' );
// Variables that shouldn't be unset
$no_unset = array( 'GLOBALS', '_GET', '_POST', '_COOKIE', '_REQUEST', '_SERVER', '_ENV', '_FILES', 'table_prefix' );
$input = array_merge( $_GET, $_POST, $_COOKIE, $_SERVER, $_ENV, $_FILES, isset( $_SESSION ) && is_array( $_SESSION ) ? $_SESSION : array() );
foreach ( $input as $k => $v )
if ( !in_array( $k, $no_unset ) && isset( $GLOBALS[$k] ) ) {
unset( $GLOBALS[$k] );
}
}
/**
* Fix `$_SERVER` variables for various setups.
*
* @since 3.0.0
* @access private
*
* @global string $PHP_SELF The filename of the currently executing script,
* relative to the document root.
*/
function wp_fix_server_vars() {
global $PHP_SELF;
$default_server_values = array(
'SERVER_SOFTWARE' => '',
'REQUEST_URI' => '',
);
$_SERVER = array_merge( $default_server_values, $_SERVER );
// Fix for IIS when running with PHP ISAPI
if ( empty( $_SERVER['REQUEST_URI'] ) || ( PHP_SAPI != 'cgi-fcgi' && preg_match( '/^Microsoft-IIS\//', $_SERVER['SERVER_SOFTWARE'] ) ) ) {
// IIS Mod-Rewrite
if ( isset( $_SERVER['HTTP_X_ORIGINAL_URL'] ) ) {
$_SERVER['REQUEST_URI'] = $_SERVER['HTTP_X_ORIGINAL_URL']; }
// IIS Isapi_Rewrite
elseif ( isset( $_SERVER['HTTP_X_REWRITE_URL'] ) ) {
$_SERVER['REQUEST_URI'] = $_SERVER['HTTP_X_REWRITE_URL'];
} else {
// Use ORIG_PATH_INFO if there is no PATH_INFO
if ( !isset( $_SERVER['PATH_INFO'] ) && isset( $_SERVER['ORIG_PATH_INFO'] ) )
$_SERVER['PATH_INFO'] = $_SERVER['ORIG_PATH_INFO'];
// Some IIS + PHP configurations puts the script-name in the path-info (No need to append it twice)
if ( isset( $_SERVER['PATH_INFO'] ) ) {
if ( $_SERVER['PATH_INFO'] == $_SERVER['SCRIPT_NAME'] )
$_SERVER['REQUEST_URI'] = $_SERVER['PATH_INFO'];
else
$_SERVER['REQUEST_URI'] = $_SERVER['SCRIPT_NAME'] . $_SERVER['PATH_INFO'];
}
// Append the query string if it exists and isn't null
if ( ! empty( $_SERVER['QUERY_STRING'] ) ) {
$_SERVER['REQUEST_URI'] .= '?' . $_SERVER['QUERY_STRING'];
}
}
}
// Fix for PHP as CGI hosts that set SCRIPT_FILENAME to something ending in php.cgi for all requests
if ( isset( $_SERVER['SCRIPT_FILENAME'] ) && ( strpos( $_SERVER['SCRIPT_FILENAME'], 'php.cgi' ) == strlen( $_SERVER['SCRIPT_FILENAME'] ) - 7 ) )
$_SERVER['SCRIPT_FILENAME'] = $_SERVER['PATH_TRANSLATED'];
// Fix for Dreamhost and other PHP as CGI hosts
if ( strpos( $_SERVER['SCRIPT_NAME'], 'php.cgi' ) !== false )
unset( $_SERVER['PATH_INFO'] );
// Fix empty PHP_SELF
$PHP_SELF = $_SERVER['PHP_SELF'];
if ( empty( $PHP_SELF ) )
$_SERVER['PHP_SELF'] = $PHP_SELF = preg_replace( '/(\?.*)?$/', '', $_SERVER["REQUEST_URI"] );
}
/**
* Check for the required PHP version, and the MySQL extension or
* a database drop-in.
*
* Dies if requirements are not met.
*
* @since 3.0.0
* @access private
*
* @global string $required_php_version The required PHP version string.
* @global string $wp_version The WordPress version string.
*/
function wp_check_php_mysql_versions() {
global $required_php_version, $wp_version;
$php_version = phpversion();
if ( version_compare( $required_php_version, $php_version, '>' ) ) {
wp_load_translations_early();
$protocol = wp_get_server_protocol();
header( sprintf( '%s 500 Internal Server Error', $protocol ), true, 500 );
header( 'Content-Type: text/html; charset=utf-8' );
/* translators: 1: Current PHP version number, 2: WordPress version number, 3: Minimum required PHP version number */
die( sprintf( __( 'Your server is running PHP version %1$s but WordPress %2$s requires at least %3$s.' ), $php_version, $wp_version, $required_php_version ) );
}
if ( ! extension_loaded( 'mysql' ) && ! extension_loaded( 'mysqli' ) && ! extension_loaded( 'mysqlnd' ) && ! file_exists( WP_CONTENT_DIR . '/db.php' ) ) {
wp_load_translations_early();
$protocol = wp_get_server_protocol();
header( sprintf( '%s 500 Internal Server Error', $protocol ), true, 500 );
header( 'Content-Type: text/html; charset=utf-8' ); die( __( 'Your PHP installation appears to be missing the MySQL extension which is required by WordPress.' ) );
}
}
/**
* Don't load all of WordPress when handling a favicon.ico request.
*
* Instead, send the headers for a zero-length favicon and bail.
*
* @since 3.0.0
*/
function wp_favicon_request() {
if ( '/favicon.ico' == $_SERVER['REQUEST_URI'] ) {
header('Content-Type: image/vnd.microsoft.icon');
exit;
}
}
/**
* Die with a maintenance message when conditions are met.
*
* Checks for a file in the WordPress root directory named ".maintenance".
* This file will contain the variable $upgrading, set to the time the file
* was created. If the file was created less than 10 minutes ago, WordPress
* enters maintenance mode and displays a message.
*
* The default message can be replaced by using a drop-in (maintenance.php in
* the wp-content directory).
*
* @since 3.0.0
* @access private
*
* @global int $upgrading the unix timestamp marking when upgrading WordPress began.
*/
function wp_maintenance() {
if ( ! file_exists( ABSPATH . '.maintenance' ) || wp_installing() )
return;
global $upgrading;
include( ABSPATH . '.maintenance' );
// If the $upgrading timestamp is older than 10 minutes, don't die.
if ( ( time() - $upgrading ) >= 600 )
return;
/**
* Filters whether to enable maintenance mode.
*
* This filter runs before it can be used by plugins. It is designed for
* non-web runtimes. If this filter returns true, maintenance mode will be
* active and the request will end. If false, the request will be allowed to
* continue processing even if maintenance mode should be active.
*
* @since 4.6.0
*
* @param bool $enable_checks Whether to enable maintenance mode. Default true.
* @param int $upgrading The timestamp set in the .maintenance file.
*/
if ( ! apply_filters( 'enable_maintenance_mode', true, $upgrading ) ) {
return;
}
if ( file_exists( WP_CONTENT_DIR . '/maintenance.php' ) ) {
require_once( WP_CONTENT_DIR . '/maintenance.php' );
die();
}
wp_load_translations_early();
$protocol = wp_get_server_protocol(); header( "$protocol 503 Service Unavailable", true, 503 );
header( 'Content-Type: text/html; charset=utf-8' );
header( 'Retry-After: 600' );
?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"<?php if ( is_rtl() ) echo ' dir="rtl"'; ?>>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title><?php _e( 'Maintenance' ); ?></title>
</head>
<body>
<h1><?php _e( 'Briefly unavailable for scheduled maintenance. Check back in a minute.' ); ?></h1>
</body>
</html>
<?php
die();
}
/**
* Start the WordPress micro-timer.
*
* @since 0.71
* @access private
*
* @global float $timestart Unix timestamp set at the beginning of the page load.
* @see timer_stop()
*
* @return bool Always returns true.
*/
function timer_start() {
global $timestart;
$timestart = microtime( true );
return true;
}
/**
* Retrieve or display the time from the page start to when function is called.
*
* @since 0.71
*
* @global float $timestart Seconds from when timer_start() is called.
* @global float $timeend Seconds from when function is called.
*
* @param int|bool $display Whether to echo or return the results. Accepts 0|false for return,
* 1|true for echo. Default 0|false.
* @param int $precision The number of digits from the right of the decimal to display.
* Default 3.
* @return string The "second.microsecond" finished time calculation. The number is formatted
* for human consumption, both localized and rounded.
*/
function timer_stop( $display = 0, $precision = 3 ) {
global $timestart, $timeend;
$timeend = microtime( true );
$timetotal = $timeend - $timestart;
$r = ( function_exists( 'number_format_i18n' ) ) ? number_format_i18n( $timetotal, $precision ) : number_format( $timetotal, $precision );
if ( $display )
echo $r;
return $r;
}
/**
* Set PHP error reporting based on WordPress debug settings.
*
* Uses three constants: `WP_DEBUG`, `WP_DEBUG_DISPLAY`, and `WP_DEBUG_LOG`.
* All three can be defined in wp-config.php. By default, `WP_DEBUG` and
* `WP_DEBUG_LOG` are set to false, and `WP_DEBUG_DISPLAY` is set to true.
*
* When `WP_DEBUG` is true, all PHP notices are reported. WordPress will also
* display internal notices: when a deprecated WordPress function, function * argument, or file is used. Deprecated code may be removed from a later
* version.
*
* It is strongly recommended that plugin and theme developers use `WP_DEBUG`
* in their development environments.
*
* `WP_DEBUG_DISPLAY` and `WP_DEBUG_LOG` perform no function unless `WP_DEBUG`
* is true.
*
* When `WP_DEBUG_DISPLAY` is true, WordPress will force errors to be displayed.
* `WP_DEBUG_DISPLAY` defaults to true. Defining it as null prevents WordPress
* from changing the global configuration setting. Defining `WP_DEBUG_DISPLAY`
* as false will force errors to be hidden.
*
* When `WP_DEBUG_LOG` is true, errors will be logged to debug.log in the content
* directory.
*
* Errors are never displayed for XML-RPC, REST, and Ajax requests.
*
* @since 3.0.0
* @access private
*/
function wp_debug_mode() {
/**
* Filters whether to allow the debug mode check to occur.
*
* This filter runs before it can be used by plugins. It is designed for
* non-web run-times. Returning false causes the `WP_DEBUG` and related
* constants to not be checked and the default php values for errors
* will be used unless you take care to update them yourself.
*
* @since 4.6.0
*
* @param bool $enable_debug_mode Whether to enable debug mode checks to occur. Default true.
*/
if ( ! apply_filters( 'enable_wp_debug_mode_checks', true ) ){
return;
}
if ( WP_DEBUG ) {
error_reporting( E_ALL );
if ( WP_DEBUG_DISPLAY )
ini_set( 'display_errors', 1 );
elseif ( null !== WP_DEBUG_DISPLAY )
ini_set( 'display_errors', 0 );
if ( WP_DEBUG_LOG ) {
ini_set( 'log_errors', 1 );
ini_set( 'error_log', WP_CONTENT_DIR . '/debug.log' );
}
} else {
error_reporting( E_CORE_ERROR | E_CORE_WARNING | E_COMPILE_ERROR | E_ERROR | E_WARNING | E_PARSE | E_USER_ERROR | E_USER_WARNING | E_RECOVERABLE_ERROR );
}
if ( defined( 'XMLRPC_REQUEST' ) || defined( 'REST_REQUEST' ) || ( defined( 'WP_INSTALLING' ) && WP_INSTALLING ) || wp_doing_ajax() ) {
@ini_set( 'display_errors', 0 );
}
}
/**
* Set the location of the language directory.
*
* To set directory manually, define the `WP_LANG_DIR` constant
* in wp-config.php.
*
* If the language directory exists within `WP_CONTENT_DIR`, it
* is used. Otherwise the language directory is assumed to live
* in `WPINC`.
* * @since 3.0.0
* @access private
*/
function wp_set_lang_dir() {
if ( !defined( 'WP_LANG_DIR' ) ) {
if ( file_exists( WP_CONTENT_DIR . '/languages' ) && @is_dir( WP_CONTENT_DIR . '/languages' ) || !@is_dir(ABSPATH . WPINC . '/languages') ) {
/**
* Server path of the language directory.
*
* No leading slash, no trailing slash, full path, not relative to ABSPATH
*
* @since 2.1.0
*/
define( 'WP_LANG_DIR', WP_CONTENT_DIR . '/languages' );
if ( !defined( 'LANGDIR' ) ) {
// Old static relative path maintained for limited backward compatibility - won't work in some cases.
define( 'LANGDIR', 'wp-content/languages' );
}
} else {
/**
* Server path of the language directory.
*
* No leading slash, no trailing slash, full path, not relative to `ABSPATH`.
*
* @since 2.1.0
*/
define( 'WP_LANG_DIR', ABSPATH . WPINC . '/languages' );
if ( !defined( 'LANGDIR' ) ) {
// Old relative path maintained for backward compatibility.
define( 'LANGDIR', WPINC . '/languages' );
}
}
}
}
/**
* Load the database class file and instantiate the `$wpdb` global.
*
* @since 2.5.0
*
* @global wpdb $wpdb The WordPress database class.
*/
function require_wp_db() {
global $wpdb;
require_once( ABSPATH . WPINC . '/wp-db.php' );
if ( file_exists( WP_CONTENT_DIR . '/db.php' ) )
require_once( WP_CONTENT_DIR . '/db.php' );
if ( isset( $wpdb ) ) {
return;
}
$wpdb = new wpdb( DB_USER, DB_PASSWORD, DB_NAME, DB_HOST );
}
/**
* Set the database table prefix and the format specifiers for database
* table columns.
*
* Columns not listed here default to `%s`.
*
* @since 3.0.0
* @access private
*
* @global wpdb $wpdb The WordPress database class.
* @global string $table_prefix The database table prefix.
*/
function wp_set_wpdb_vars() {
global $wpdb, $table_prefix; if ( !empty( $wpdb->error ) )
dead_db();
$wpdb->field_types = array( 'post_author' => '%d', 'post_parent' => '%d', 'menu_order' => '%d', 'term_id' => '%d', 'term_group' => '%d', 'term_taxonomy_id' => '%d',
'parent' => '%d', 'count' => '%d','object_id' => '%d', 'term_order' => '%d', 'ID' => '%d', 'comment_ID' => '%d', 'comment_post_ID' => '%d', 'comment_parent' => '%d',
'user_id' => '%d', 'link_id' => '%d', 'link_owner' => '%d', 'link_rating' => '%d', 'option_id' => '%d', 'blog_id' => '%d', 'meta_id' => '%d', 'post_id' => '%d',
'user_status' => '%d', 'umeta_id' => '%d', 'comment_karma' => '%d', 'comment_count' => '%d',
// multisite:
'active' => '%d', 'cat_id' => '%d', 'deleted' => '%d', 'lang_id' => '%d', 'mature' => '%d', 'public' => '%d', 'site_id' => '%d', 'spam' => '%d',
);
$prefix = $wpdb->set_prefix( $table_prefix );
if ( is_wp_error( $prefix ) ) {
wp_load_translations_early();
wp_die(
/* translators: 1: $table_prefix 2: wp-config.php */
sprintf( __( '<strong>ERROR</strong>: %1$s in %2$s can only contain numbers, letters, and underscores.' ),
'<code>$table_prefix</code>',
'<code>wp-config.php</code>'
)
);
}
}
/**
* Toggle `$_wp_using_ext_object_cache` on and off without directly
* touching global.
*
* @since 3.7.0
*
* @global bool $_wp_using_ext_object_cache
*
* @param bool $using Whether external object cache is being used.
* @return bool The current 'using' setting.
*/
function wp_using_ext_object_cache( $using = null ) {
global $_wp_using_ext_object_cache;
$current_using = $_wp_using_ext_object_cache;
if ( null !== $using )
$_wp_using_ext_object_cache = $using;
return $current_using;
}
/**
* Start the WordPress object cache.
*
* If an object-cache.php file exists in the wp-content directory,
* it uses that drop-in as an external object cache.
*
* @since 3.0.0
* @access private
*/
function wp_start_object_cache() {
global $wp_filter;
$first_init = false;
if ( ! function_exists( 'wp_cache_init' ) ) {
if ( file_exists( WP_CONTENT_DIR . '/object-cache.php' ) ) {
require_once ( WP_CONTENT_DIR . '/object-cache.php' );
if ( function_exists( 'wp_cache_init' ) ) {
wp_using_ext_object_cache( true );
}
// Re-initialize any hooks added manually by object-cache.php
if ( $wp_filter ) {
$wp_filter = WP_Hook::build_preinitialized_hooks( $wp_filter );
}
}
$first_init = true;
} elseif ( ! wp_using_ext_object_cache() && file_exists( WP_CONTENT_DIR . '/object-cache.php' ) ) {
/*
* Sometimes advanced-cache.php can load object-cache.php before
* it is loaded here. This breaks the function_exists check above
* and can result in `$_wp_using_ext_object_cache` being set
* incorrectly. Double check if an external cache exists.
*/
wp_using_ext_object_cache( true );
}
if ( ! wp_using_ext_object_cache() ) {
require_once ( ABSPATH . WPINC . '/cache.php' );
}
/*
* If cache supports reset, reset instead of init if already
* initialized. Reset signals to the cache that global IDs
* have changed and it may need to update keys and cleanup caches.
*/
if ( ! $first_init && function_exists( 'wp_cache_switch_to_blog' ) ) {
wp_cache_switch_to_blog( get_current_blog_id() );
} elseif ( function_exists( 'wp_cache_init' ) ) {
wp_cache_init();
}
if ( function_exists( 'wp_cache_add_global_groups' ) ) {
wp_cache_add_global_groups( array( 'users', 'userlogins', 'usermeta', 'user_meta', 'useremail', 'userslugs', 'site-transient', 'site-options', 'blog-lookup', 'blog-details', 'site-details', 'rss', 'global-posts', 'blog-id-cache', 'networks', 'sites' ) );
wp_cache_add_non_persistent_groups( array( 'counts', 'plugins' ) );
}
}
/**
* Redirect to the installer if WordPress is not installed.
*
* Dies with an error message when Multisite is enabled.
*
* @since 3.0.0
* @access private
*/
function wp_not_installed() {
if ( is_multisite() ) {
if ( ! is_blog_installed() && ! wp_installing() ) {
nocache_headers();
wp_die( __( 'The site you have requested is not installed properly. Please contact the system administrator.' ) );
}
} elseif ( ! is_blog_installed() && ! wp_installing() ) {
nocache_headers();
require( ABSPATH . WPINC . '/kses.php' );
require( ABSPATH . WPINC . '/pluggable.php' );
require( ABSPATH . WPINC . '/formatting.php' );
$link = wp_guess_url() . '/wp-admin/install.php';
wp_redirect( $link );
die();
}
}
/**
* Retrieve an array of must-use plugin files.
*
* The default directory is wp-content/mu-plugins. To change the default
* directory manually, define `WPMU_PLUGIN_DIR` and `WPMU_PLUGIN_URL`
* in wp-config.php.
*
* @since 3.0.0
* @access private *
* @return array Files to include.
*/
function wp_get_mu_plugins() {
$mu_plugins = array();
if ( !is_dir( WPMU_PLUGIN_DIR ) )
return $mu_plugins;
if ( ! $dh = opendir( WPMU_PLUGIN_DIR ) )
return $mu_plugins;
while ( ( $plugin = readdir( $dh ) ) !== false ) {
if ( substr( $plugin, -4 ) == '.php' )
$mu_plugins[] = WPMU_PLUGIN_DIR . '/' . $plugin;
}
closedir( $dh );
sort( $mu_plugins );
return $mu_plugins;
}
/**
* Retrieve an array of active and valid plugin files.
*
* While upgrading or installing WordPress, no plugins are returned.
*
* The default directory is wp-content/plugins. To change the default
* directory manually, define `WP_PLUGIN_DIR` and `WP_PLUGIN_URL`
* in wp-config.php.
*
* @since 3.0.0
* @access private
*
* @return array Files.
*/
function wp_get_active_and_valid_plugins() {
$plugins = array();
$active_plugins = (array) get_option( 'active_plugins', array() );
// Check for hacks file if the option is enabled
if ( get_option( 'hack_file' ) && file_exists( ABSPATH . 'my-hacks.php' ) ) {
_deprecated_file( 'my-hacks.php', '1.5.0' );
array_unshift( $plugins, ABSPATH . 'my-hacks.php' );
}
if ( empty( $active_plugins ) || wp_installing() )
return $plugins;
$network_plugins = is_multisite() ? wp_get_active_network_plugins() : false;
foreach ( $active_plugins as $plugin ) {
if ( ! validate_file( $plugin ) // $plugin must validate as file
&& '.php' == substr( $plugin, -4 ) // $plugin must end with '.php'
&& file_exists( WP_PLUGIN_DIR . '/' . $plugin ) // $plugin must exist
// not already included as a network plugin
&& ( ! $network_plugins || ! in_array( WP_PLUGIN_DIR . '/' . $plugin, $network_plugins ) )
)
$plugins[] = WP_PLUGIN_DIR . '/' . $plugin;
}
return $plugins;
}
/**
* Set internal encoding.
*
* 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.
*
* @since 3.0.0
* @access private
*/
function wp_set_internal_encoding() { if ( function_exists( 'mb_internal_encoding' ) ) {
$charset = get_option( 'blog_charset' );
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.
*
* @since 3.0.0
* @access private
*/
function wp_magic_quotes() {
// If already slashed, strip.
if ( get_magic_quotes_gpc() ) {
$_GET = stripslashes_deep( $_GET );
$_POST = stripslashes_deep( $_POST );
$_COOKIE = stripslashes_deep( $_COOKIE );
}
// Escape with wpdb.
$_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.
*
* @since 1.2.0
* @access private
*/
function shutdown_action_hook() {
/**
* Fires just before PHP shuts down execution.
*
* @since 1.2.0
*/
do_action( 'shutdown' );
wp_cache_close();
}
/**
* Copy an object.
*
* @since 2.7.0
* @deprecated 3.2.0
*
* @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
return clone( $object );
}
/**
* Whether the current request is for an administrative interface page.
*
* Does not check if the user is an administrator; current_user_can()
* for checking roles and capabilities. *
* @since 1.5.1
*
* @global WP_Screen $current_screen
*
* @return bool True if inside WordPress administration interface, false otherwise.
*/
function is_admin() {
if ( isset( $GLOBALS['current_screen'] ) )
return $GLOBALS['current_screen']->in_admin();
elseif ( defined( 'WP_ADMIN' ) )
return WP_ADMIN;
return false;
}
/**
* Whether the current request is for a site's admininstrative interface.
*
* e.g. `/wp-admin/`
*
* Does not check if the user is an administrator; current_user_can()
* for checking roles and capabilities.
*
* @since 3.1.0
*
* @global WP_Screen $current_screen
*
* @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' ) )
return WP_BLOG_ADMIN;
return false;
}
/**
* Whether the current request is for the network administrative interface.
*
* e.g. `/wp-admin/network/`
*
* Does not check if the user is an administrator; current_user_can()
* for checking roles and capabilities.
*
* @since 3.1.0
*
* @global WP_Screen $current_screen
*
* @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' ) )
return WP_NETWORK_ADMIN;
return false;
}
/**
* Whether the current request is for a user admin screen.
*
* e.g. `/wp-admin/user/`
*
* Does not inform on whether the user is an admin! Use capability
* checks to tell if the user should be accessing a section or not
* current_user_can(). *
* @since 3.1.0
*
* @global WP_Screen $current_screen
*
* @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' ) )
return WP_USER_ADMIN;
return false;
}
/**
* If Multisite is enabled.
*
* @since 3.0.0
*
* @return bool True if Multisite is enabled, false otherwise.
*/
function is_multisite() {
if ( defined( 'MULTISITE' ) )
return MULTISITE;
if ( defined( 'SUBDOMAIN_INSTALL' ) || defined( 'VHOST' ) || defined( 'SUNRISE' ) )
return true;
return false;
}
/**
* Retrieve the current site ID.
*
* @since 3.1.0
*
* @global int $blog_id
*
* @return int Site ID.
*/
function get_current_blog_id() {
global $blog_id;
return absint($blog_id);
}
/**
* Retrieves the current network ID.
*
* @since 4.6.0
*
* @return int The ID of the current network.
*/
function get_current_network_id() {
if ( ! is_multisite() ) {
return 1;
}
$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.
*
* @since 3.4.0
* @access private
*
* @global WP_Locale $wp_locale The WordPress date and time locale object.
*
* @staticvar bool $loaded
*/
function wp_load_translations_early() {
global $wp_locale;
static $loaded = false;
if ( $loaded )
return;
$loaded = true;
if ( function_exists( 'did_action' ) && did_action( 'init' ) )
return;
// 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';
// General libraries
require_once ABSPATH . WPINC . '/plugin.php';
$locales = $locations = array();
while ( true ) {
if ( defined( 'WPLANG' ) ) {
if ( '' == WPLANG )
break;
$locales[] = WPLANG;
}
if ( isset( $wp_local_package ) )
$locales[] = $wp_local_package;
if ( ! $locales )
break;
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';
if ( ! $locations )
break;
$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' );
break 2;
}
}
}
break;
}
$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`.
*
* @since 4.4.0
*
* @staticvar bool $installing
*
* @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 2.6.0
* @since 4.6.0 Moved from functions.php to load.php.
*
* @return bool True if SSL, otherwise false.
*/
function is_ssl() {
if ( isset( $_SERVER['HTTPS'] ) ) {
if ( 'on' == strtolower( $_SERVER['HTTPS'] ) ) {
return true;
}
if ( '1' == $_SERVER['HTTPS'] ) {
return true;
}
} elseif ( isset($_SERVER['SERVER_PORT'] ) && ( '443' == $_SERVER['SERVER_PORT'] ) ) {
return true;
}
return false;
}
/**
* Converts a shorthand byte value to an integer byte value.
*
* @since 2.3.0
* @since 4.6.0 Moved from media.php to load.php.
*
* @link https://secure.php.net/manual/en/function.ini-get.php
* @link https://secure.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 ) );
$bytes = (int) $value;
if ( false !== strpos( $value, 'g' ) ) {
$bytes *= GB_IN_BYTES;
} elseif ( false !== strpos( $value, 'm' ) ) {
$bytes *= MB_IN_BYTES;
} elseif ( false !== strpos( $value, 'k' ) ) {
$bytes *= KB_IN_BYTES;
}
// 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.
*
* @since 4.6.0
*
* @link https://secure.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 ) {
static $ini_all;
if ( ! isset( $ini_all ) ) {
$ini_all = false;
// 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 ) ) ) {
return true;
}
// If we were unable to retrieve the details, fail gracefully to assume it's changeable.
if ( ! is_array( $ini_all ) ) {
return true;
}
return false;
}
/**
* Determines whether the current request is a WordPress Ajax request.
*
* @since 4.7.0
*
* @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.
*
* @since 4.7.0
*
* @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 is a WordPress cron request.
*
* @since 4.8.0
*
* @return bool True if it's a WordPress cron request, false otherwise.
*/
function wp_doing_cron() {
/**
* Filters whether the current request is a WordPress cron request.
*
* @since 4.8.0
*
* @param bool $wp_doing_cron Whether the current request is a WordPress cron request.
*/
return apply_filters( 'wp_doing_cron', defined( 'DOING_CRON' ) && DOING_CRON );
}
/**
* Check whether variable is a WordPress Error.
*
* Returns true if $thing is an object of the WP_Error class.
*
* @since 2.1.0
*
* @param mixed $thing Check if unknown variable is a WP_Error object.
* @return bool True, if WP_Error. False, if not WP_Error.
*/
function is_wp_error( $thing ) {
return ( $thing instanceof WP_Error );
}
/**
* Determines whether file modifications are allowed.
*
* @since 4.8.0
*
* @param string $context The usage context.
* @return bool True if file modification is allowed, false otherwise.
*/
function wp_is_file_mod_allowed( $context ) {
/**
* Filters whether file modifications are allowed.
*
* @since 4.8.0
*
* @param bool $file_mod_allowed Whether file modifications are allowed.
* @param string $context The usage context.
*/
return apply_filters( 'file_mod_allowed', ! defined( 'DISALLOW_FILE_MODS' ) || ! DISALLOW_FILE_MODS, $context );
}