/wp-includes/load.php

<?php

/**

 * These functions are needed to load WordPress.

 *

 * @internal This file must be parsable by PHP4.

 *

 * @package WordPress

 */



/**

 * Turn register globals off.

 *

 * @since 2.1.0

 * @access private

 *

 * @return null Will return null if register_globals PHP directive was disabled.

 */

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_name() != '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

		else if ( 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();

		header( 'Content-Type: text/html; charset=utf-8' );

		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' ) && ! file_exists( WP_CONTENT_DIR . '/db.php' ) ) {

		wp_load_translations_early();

		 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');

		header('Content-Length: 0');

		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' ) || defined( '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;



	if ( file_exists( WP_CONTENT_DIR . '/maintenance.php' ) ) {

		require_once( WP_CONTENT_DIR . '/maintenance.php' );

		die();

	}



	wp_load_translations_early();



	$protocol = $_SERVER["SERVER_PROTOCOL"];

	if ( 'HTTP/1.1' != $protocol && 'HTTP/1.0' != $protocol )

		$protocol = 'HTTP/1.0';

	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 $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, and by default are set to false.

 *

 * 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 requests.

 *

 * @since 3.0.0

 * @access private

 */

function wp_debug_mode() {

	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' ) )

		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 backwards 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 backwards 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( __( '<strong>ERROR</strong>: <code>$table_prefix</code> in <code>wp-config.php</code> can only contain numbers, letters, and underscores.' ) );

	}

}



/**

 * Access/Modify private global variable `$_wp_using_ext_object_cache`.

 *

 * Toggle `$_wp_using_ext_object_cache` on and off without directly

 * touching global.

 *

 * @since 3.7.0

 *

 * @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

 *

 * @global int $blog_id Blog ID.

 */

function wp_start_object_cache() {

	global $blog_id;



	$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 );

		}



		$first_init = true;

	} else if ( ! 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( $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', 'site-transient', 'site-options', 'site-lookup', 'blog-lookup', 'blog-details', 'rss', 'global-posts', 'blog-id-cache' ) );

		wp_cache_add_non_persistent_groups( array( 'comment', '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() && ! defined( 'WP_INSTALLING' ) ) {

			nocache_headers();



			wp_die( __( 'The site you have requested is not installed properly. Please contact the system administrator.' ) );

		}

	} elseif ( ! is_blog_installed() && false === strpos( $_SERVER['PHP_SELF'], 'install.php' ) && !defined( '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' );

		array_unshift( $plugins, ABSPATH . 'my-hacks.php' );

	}



	if ( empty( $active_plugins ) || defined( '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; {@see current_user_can()}

 * for checking roles and capabilities.

 *

 * @since 1.5.1

 *

 * @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; {@see current_user_can()}

 * for checking roles and capabilities.

 *

 * @since 3.1.0

 *

 * @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; {@see current_user_can()}

 * for checking roles and capabilities.

 *

 * @since 3.1.0

 *

 * @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

 * {@see current_user_can()}.

 *

 * @since 3.1.0

 *

 * @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 blog ID.

 *

 * @since 3.1.0

 *

 * @return int Blog id

 */

function get_current_blog_id() {

	global $blog_id;

	return absint($blog_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 The WordPress date and time locale object.

 */

function wp_load_translations_early() {

	global $text_direction, $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 . '/locale.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();

}