WordPress 4.3

[autoinstalls/wordpress.git] / wp-includes / load.php

diff --git a/wp-includes/load.php b/wp-includes/load.php
index a514498a29e2c9b3b8a7332cc6821c01c4cff442..a6ad0222a29be9a2411e795cf8b2ebecd76b3820 100644 (file)
--- a/wp-includes/load.php
+++ b/wp-includes/load.php
@@ -2,22 +2,23 @@
 /**
  * These functions are needed to load WordPress.
  *
 /**
  * These functions are needed to load WordPress.
  *

+ * @internal This file must be parsable by PHP4.
+ *

  * @package WordPress
  */
 
 /**
  * Turn register globals off.
  *
  * @package WordPress
  */
 
 /**
  * Turn register globals off.
  *

- * @access private

  * @since 2.1.0
  * @since 2.1.0

- * @return null Will return null if register_globals PHP directive was disabled
+ * @access private

  */
 function wp_unregister_GLOBALS() {
        if ( !ini_get( 'register_globals' ) )
                return;
 
        if ( isset( $_REQUEST['GLOBALS'] ) )
  */
 function wp_unregister_GLOBALS() {
        if ( !ini_get( 'register_globals' ) )
                return;
 
        if ( isset( $_REQUEST['GLOBALS'] ) )

-               die( /*WP_I18N_GLOBALS_OVERWRITE*/'GLOBALS overwrite attempt detected'/*/WP_I18N_GLOBALS_OVERWRITE*/ );
+               die( 'GLOBALS overwrite attempt detected' );

 
        // Variables that shouldn't be unset
        $no_unset = array( 'GLOBALS', '_GET', '_POST', '_COOKIE', '_REQUEST', '_SERVER', '_ENV', '_FILES', 'table_prefix' );
 
        // Variables that shouldn't be unset
        $no_unset = array( 'GLOBALS', '_GET', '_POST', '_COOKIE', '_REQUEST', '_SERVER', '_ENV', '_FILES', 'table_prefix' );


@@ -25,16 +26,18 @@ function wp_unregister_GLOBALS() {
        $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] ) ) {
        $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] ) ) {

-                       $GLOBALS[$k] = null;

                        unset( $GLOBALS[$k] );
                }
 }
 
 /**
                        unset( $GLOBALS[$k] );
                }
 }
 
 /**

- * Fix $_SERVER variables for various setups.
+ * Fix `$_SERVER` variables for various setups.

  *
  *

- * @access private

  * @since 3.0.0
  * @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;
  */
 function wp_fix_server_vars() {
        global $PHP_SELF;


@@ -47,14 +50,14 @@ function wp_fix_server_vars() {
        $_SERVER = array_merge( $default_server_values, $_SERVER );
 
        // Fix for IIS when running with PHP ISAPI
        $_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'] ) ) ) {
+       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
 
                // 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'] ) ) {
+               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
                        $_SERVER['REQUEST_URI'] = $_SERVER['HTTP_X_REWRITE_URL'];
                } else {
                        // Use ORIG_PATH_INFO if there is no PATH_INFO


@@ -91,27 +94,37 @@ function wp_fix_server_vars() {
 }
 
 /**
 }
 
 /**

- * Check for the required PHP version, and the MySQL extension or a database drop-in.
+ * Check for the required PHP version, and the MySQL extension or
+ * a database drop-in.

  *
  * Dies if requirements are not met.
  *
  *
  * Dies if requirements are not met.
  *

- * @access private

  * @since 3.0.0
  * @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() {
  */
 function wp_check_php_mysql_versions() {

-       // we can probably extend this function to check if wp_die() exists then use translated strings, and then use it in install.php etc.
-

        global $required_php_version, $wp_version;
        $php_version = phpversion();
        global $required_php_version, $wp_version;
        $php_version = phpversion();

-       if ( version_compare( $required_php_version, $php_version, '>' ) )
-               die( sprintf( /*WP_I18N_OLD_PHP*/'Your server is running PHP version %1$s but WordPress %2$s requires at least %3$s.'/*/WP_I18N_OLD_PHP*/, $php_version, $wp_version, $required_php_version ) );

 
 

-       if ( !extension_loaded( 'mysql' ) && !file_exists( WP_CONTENT_DIR . '/db.php' ) )
-               die( /*WP_I18N_OLD_MYSQL*/'Your PHP installation appears to be missing the MySQL extension which is required by WordPress.'/*/WP_I18N_OLD_MYSQL*/ );
+       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.
 }
 
 /**
  * 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
  * Instead, send the headers for a zero-length favicon and bail.
  *
  * @since 3.0.0


@@ -125,7 +138,7 @@ function wp_favicon_request() {
 }
 
 /**
 }
 
 /**

- * Dies with a maintenance message when conditions are met.
+ * 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
  *
  * Checks for a file in the WordPress root directory named ".maintenance".
  * This file will contain the variable $upgrading, set to the time the file


@@ -135,8 +148,10 @@ function wp_favicon_request() {
  * The default message can be replaced by using a drop-in (maintenance.php in
  * the wp-content directory).
  *
  * The default message can be replaced by using a drop-in (maintenance.php in
  * the wp-content directory).
  *

- * @access private

  * @since 3.0.0
  * @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' ) )
  */
 function wp_maintenance() {
        if ( !file_exists( ABSPATH . '.maintenance' ) || defined( 'WP_INSTALLING' ) )


@@ -154,6 +169,8 @@ function wp_maintenance() {
                die();
        }
 
                die();
        }
 

+       wp_load_translations_early();
+

        $protocol = $_SERVER["SERVER_PROTOCOL"];
        if ( 'HTTP/1.1' != $protocol && 'HTTP/1.0' != $protocol )
                $protocol = 'HTTP/1.0';
        $protocol = $_SERVER["SERVER_PROTOCOL"];
        if ( 'HTTP/1.1' != $protocol && 'HTTP/1.0' != $protocol )
                $protocol = 'HTTP/1.0';


@@ -161,15 +178,15 @@ function wp_maintenance() {
        header( 'Content-Type: text/html; charset=utf-8' );
        header( 'Retry-After: 600' );
 ?>
        header( 'Content-Type: text/html; charset=utf-8' );
        header( 'Retry-After: 600' );
 ?>

-       <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
-       <html xmlns="http://www.w3.org/1999/xhtml">
+       <!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" />
        <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

-               <title><?php echo /*WP_I18N_MAINTENANCE*/'Maintenance'/*/WP_I18N_MAINTENANCE*/; ?></title>
+               <title><?php _e( 'Maintenance' ); ?></title>

 
        </head>
        <body>
 
        </head>
        <body>

-               <h1><?php echo /*WP_I18N_MAINT_MSG*/'Briefly unavailable for scheduled maintenance. Check back in a minute.'/*/WP_I18N_MAINT_MSG*/; ?></h1>
+               <h1><?php _e( 'Briefly unavailable for scheduled maintenance. Check back in a minute.' ); ?></h1>

        </body>
        </html>
 <?php
        </body>
        </html>
 <?php


@@ -177,49 +194,40 @@ function wp_maintenance() {
 }
 
 /**
 }
 
 /**

- * PHP 4 standard microtime start capture.
+ * Start the WordPress micro-timer.

  *
  *

- * @access private

  * @since 0.71
  * @since 0.71

- * @global int $timestart Seconds and Microseconds added together from when function is called.
+ * @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;
  * @return bool Always returns true.
  */
 function timer_start() {
        global $timestart;

-       $mtime = explode( ' ', microtime() );
-       $timestart = $mtime[1] + $mtime[0];
+       $timestart = microtime( true );

        return true;
 }
 
 /**
        return true;
 }
 
 /**

- * Return and/or display the time from the page start to when function is called.
- *
- * You can get the results and print them by doing:
- * <code>
- * $nTimePageTookToExecute = timer_stop();
- * echo $nTimePageTookToExecute;
- * </code>
- *
- * Or instead, you can do:
- * <code>
- * timer_stop(1);
- * </code>
- * which will do what the above does. If you need the result, you can assign it to a variable, but
- * most cases, you only need to echo it.
+ * Retrieve or display the time from the page start to when function is called.

  *
  * @since 0.71
  *
  * @since 0.71

- * @global int $timestart Seconds and Microseconds added together from when timer_start() is called
- * @global int $timeend  Seconds and Microseconds added together from when function is called

  *
  *

- * @param int $display Use '0' or null to not echo anything and 1 to echo the total time
- * @param int $precision The amount of digits from the right of the decimal to display. Default is 3.
- * @return float The "second.microsecond" finished time calculation
+ * @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 ) { // if called like timer_stop(1), will echo $timetotal
+function timer_stop( $display = 0, $precision = 3 ) {

        global $timestart, $timeend;
        global $timestart, $timeend;

-       $mtime = microtime();
-       $mtime = explode( ' ', $mtime );
-       $timeend = $mtime[1] + $mtime[0];
+       $timeend = microtime( true );

        $timetotal = $timeend - $timestart;
        $r = ( function_exists( 'number_format_i18n' ) ) ? number_format_i18n( $timetotal, $precision ) : number_format( $timetotal, $precision );
        if ( $display )
        $timetotal = $timeend - $timestart;
        $r = ( function_exists( 'number_format_i18n' ) ) ? number_format_i18n( $timetotal, $precision ) : number_format( $timetotal, $precision );
        if ( $display )


@@ -228,77 +236,92 @@ function timer_stop( $display = 0, $precision = 3 ) { // if called like timer_st
 }
 
 /**
 }
 
 /**

- * Sets PHP error handling and handles WordPress debug mode.
+ * 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. Example: <code> define( 'WP_DEBUG', true ); </code>
+ * 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.

  *
  *

- * WP_DEBUG_DISPLAY and WP_DEBUG_LOG perform no function unless WP_DEBUG is true.
- * WP_DEBUG defaults 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.

  *
  *

- * When WP_DEBUG is true, all PHP notices are reported. WordPress will also display
- * notices, including one 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.

  *
  *

- * 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 false prevents WordPress from
- * changing the global configuration setting. (Defining WP_DEBUG_DISPLAY as false
- * will never force errors to be hidden.)
+ * 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 wp-content/debug.log.
- * WP_DEBUG_LOG defaults to false.
+ * 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.

  *
  *

- * @access private

  * @since 3.0.0
  * @since 3.0.0

+ * @access private

  */
 function wp_debug_mode() {
        if ( WP_DEBUG ) {
  */
 function wp_debug_mode() {
        if ( WP_DEBUG ) {

-               if ( defined( 'E_DEPRECATED' ) )
-                       error_reporting( E_ALL & ~E_DEPRECATED & ~E_STRICT );
-               else
-                       error_reporting( E_ALL );
+               error_reporting( E_ALL );

 
                if ( WP_DEBUG_DISPLAY )
                        ini_set( 'display_errors', 1 );
 
                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 {
 
                if ( WP_DEBUG_LOG ) {
                        ini_set( 'log_errors', 1 );
                        ini_set( 'error_log', WP_CONTENT_DIR . '/debug.log' );
                }
        } else {

-               if ( defined( 'E_RECOVERABLE_ERROR' ) )
-                       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 );
-               else
-                       error_reporting( E_CORE_ERROR | E_CORE_WARNING | E_COMPILE_ERROR | E_ERROR | E_WARNING | E_PARSE | E_USER_ERROR | E_USER_WARNING );
+               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 );

 }
 
 /**
 }
 
 /**

- * Sets the location of the language directory.
- *
- * To set directory manually, define <code>WP_LANG_DIR</code> in wp-config.php.
+ * Set the location of the language directory.

  *
  *

- * First looks for language folder in WP_CONTENT_DIR and uses that folder if it
- * exists. Or it uses the "languages" folder in WPINC.
+ * To set directory manually, define the `WP_LANG_DIR` constant
+ * in wp-config.php.

  *
  *

- * The WP_LANG_DIR constant was introduced in 2.1.0.
+ * If the language directory exists within `WP_CONTENT_DIR`, it
+ * is used. Otherwise the language directory is assumed to live
+ * in `WPINC`.

  *
  *

- * @access private

  * @since 3.0.0
  * @since 3.0.0

+ * @access private

  */
 function wp_set_lang_dir() {
        if ( !defined( 'WP_LANG_DIR' ) ) {
  */
 function wp_set_lang_dir() {
        if ( !defined( 'WP_LANG_DIR' ) ) {

-               if ( file_exists( WP_CONTENT_DIR . '/languages' ) && @is_dir( WP_CONTENT_DIR . '/languages' ) ) {
-                       define( 'WP_LANG_DIR', WP_CONTENT_DIR . '/languages' ); // no leading slash, no trailing slash, full path, not relative to ABSPATH
+               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 {
                        if ( !defined( 'LANGDIR' ) ) {
                                // Old static relative path maintained for limited backwards compatibility - won't work in some cases
                                define( 'LANGDIR', 'wp-content/languages' );
                        }
                } else {

-                       define( 'WP_LANG_DIR', ABSPATH . WPINC . '/languages' ); // no leading slash, no trailing slash, full path, not relative to ABSPATH
+                       /**
+                        * 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' );
                        if ( !defined( 'LANGDIR' ) ) {
                                // Old relative path maintained for backwards compatibility
                                define( 'LANGDIR', WPINC . '/languages' );


@@ -308,18 +331,36 @@ function wp_set_lang_dir() {
 }
 
 /**
 }
 
 /**

- * Sets the database table prefix and the format specifiers for database table columns.
+ * Load the database class file and instantiate the `$wpdb` global.

  *
  *

- * Columns not listed here default to %s.
+ * @since 2.5.0

  *
  *

- * @see wpdb::$field_types Since 2.8.0
- * @see wpdb::prepare()
- * @see wpdb::insert()
- * @see wpdb::update()
- * @see wpdb::set_prefix()
+ * @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`.

  *
  *

- * @access private

  * @since 3.0.0
  * @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;
  */
 function wp_set_wpdb_vars() {
        global $wpdb, $table_prefix;


@@ -327,7 +368,7 @@ function wp_set_wpdb_vars() {
                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',
                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', 'commment_ID' => '%d', 'comment_post_ID' => '%d', 'comment_parent' => '%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:
                '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:


@@ -336,90 +377,123 @@ function wp_set_wpdb_vars() {
 
        $prefix = $wpdb->set_prefix( $table_prefix );
 
 
        $prefix = $wpdb->set_prefix( $table_prefix );
 

-       if ( is_wp_error( $prefix ) )
-               wp_die( /*WP_I18N_BAD_PREFIX*/'<strong>ERROR</strong>: <code>$table_prefix</code> in <code>wp-config.php</code> can only contain numbers, letters, and underscores.'/*/WP_I18N_BAD_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.' ) );
+       }

 }
 
 /**
 }
 
 /**

- * Starts the WordPress object cache.
+ * 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.
  *
  *
  * If an object-cache.php file exists in the wp-content directory,
  * it uses that drop-in as an external object cache.
  *

- * @access private

  * @since 3.0.0
  * @since 3.0.0

+ * @access private
+ *
+ * @global int $blog_id Blog ID.

  */
 function wp_start_object_cache() {
  */
 function wp_start_object_cache() {

-       global $_wp_using_ext_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' );
 
        $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' );

-                       $_wp_using_ext_object_cache = true;
-               } else {
-                       require_once ( ABSPATH . WPINC . '/cache.php' );
-                       $_wp_using_ext_object_cache = false;
+                       if ( function_exists( 'wp_cache_init' ) )
+                               wp_using_ext_object_cache( true );

                }
                }

+

                $first_init = 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.
-               $_wp_using_ext_object_cache = true;
+       } elseif ( ! wp_using_ext_object_cache() && file_exists( WP_CONTENT_DIR . '/object-cache.php' ) ) {
+               /*
+                * Sometimes advanced-cache.php can load object-cache.php before
+                * it is loaded here. This breaks the function_exists check above
+                * and can result in `$_wp_using_ext_object_cache` being set
+                * incorrectly. Double check if an external cache exists.
+                */
+               wp_using_ext_object_cache( true );

        }
 
        }
 

-       // If 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_reset') )
-               wp_cache_reset();
-       else
+       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_init();
 
        if ( function_exists( 'wp_cache_add_global_groups' ) ) {

-               wp_cache_add_global_groups( array( 'users', 'userlogins', 'usermeta', 'site-transient', 'site-options', 'site-lookup', 'blog-lookup', 'blog-details', 'rss', 'global-posts' ) );
+               wp_cache_add_global_groups( array( 'users', 'userlogins', 'usermeta', 'user_meta', 'useremail', 'userslugs', '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' ) );
        }
 }
 
 /**
                wp_cache_add_non_persistent_groups( array( 'comment', 'counts', 'plugins' ) );
        }
 }
 
 /**

- * Redirects to the installer if WordPress is not installed.
+ * Redirect to the installer if WordPress is not installed.

  *
  *

- * Dies with an error message when multisite is enabled.
+ * Dies with an error message when Multisite is enabled.

  *
  *

- * @access private

  * @since 3.0.0
  * @since 3.0.0

+ * @access private

  */
 function wp_not_installed() {
        if ( is_multisite() ) {
  */
 function wp_not_installed() {
        if ( is_multisite() ) {

-               if ( ! is_blog_installed() && ! defined( 'WP_INSTALLING' ) )
+               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.' ) );
                        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' ) ) {
-               if ( defined( 'WP_SITEURL' ) )
-                       $link = WP_SITEURL . '/wp-admin/install.php';
-               elseif ( false !== strpos( $_SERVER['PHP_SELF'], 'wp-admin' ) )
-                       $link = preg_replace( '|/wp-admin/?.*?$|', '/', $_SERVER['PHP_SELF'] ) . 'wp-admin/install.php';
-               else
-                       $link = preg_replace( '|/[^/]+?$|', '/', $_SERVER['PHP_SELF'] ) . 'wp-admin/install.php';
+               }
+       } elseif ( ! is_blog_installed() && ! defined( 'WP_INSTALLING' ) ) {
+               nocache_headers();
+

                require( ABSPATH . WPINC . '/kses.php' );
                require( ABSPATH . WPINC . '/pluggable.php' );
                require( ABSPATH . WPINC . '/formatting.php' );
                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();
        }
 }
 
 /**
                wp_redirect( $link );
                die();
        }
 }
 
 /**

- * Returns array of must-use plugin files to be included in global scope.
+ * Retrieve an array of must-use plugin files.

  *
  *

- * The default directory is wp-content/mu-plugins. To change the default directory
- * manually, define <code>WPMU_PLUGIN_DIR</code> and <code>WPMU_PLUGIN_URL</code>
+ * 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.
  *
  * in wp-config.php.
  *

- * @access private

  * @since 3.0.0
  * @since 3.0.0

- * @return array Files to include
+ * @access private
+ *
+ * @return array Files to include.

  */
 function wp_get_mu_plugins() {
        $mu_plugins = array();
  */
 function wp_get_mu_plugins() {
        $mu_plugins = array();


@@ -438,29 +512,23 @@ function wp_get_mu_plugins() {
 }
 
 /**
 }
 
 /**

- * Returns array of plugin files to be included in global scope.
+ * 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 <code>WP_PLUGIN_DIR</code> and <code>WP_PLUGIN_URL</code>
+ * 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.
  *
  * in wp-config.php.
  *

- * @access private

  * @since 3.0.0
  * @since 3.0.0

- * @return array Files to include
+ * @access private
+ *
+ * @return array Files.

  */
 function wp_get_active_and_valid_plugins() {
        $plugins = array();
        $active_plugins = (array) get_option( 'active_plugins', array() );
 
  */
 function wp_get_active_and_valid_plugins() {
        $plugins = array();
        $active_plugins = (array) get_option( 'active_plugins', array() );
 

-       // Get active network plugins
-       if ( is_multisite() ) {
-               $active_sitewide_plugins = (array) get_site_option( 'active_sitewide_plugins', array() );
-               if ( !empty($active_sitewide_plugins) ) {
-                       $active_plugins = array_merge( $active_plugins, array_keys( $active_sitewide_plugins ) );
-                       sort( $active_plugins );
-               }
-       }
-

        // 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' );
        // 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' );


@@ -470,10 +538,14 @@ function wp_get_active_and_valid_plugins() {
        if ( empty( $active_plugins ) || defined( 'WP_INSTALLING' ) )
                return $plugins;
 
        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
        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;
        }
                        )
                $plugins[] = WP_PLUGIN_DIR . '/' . $plugin;
        }


@@ -481,29 +553,30 @@ function wp_get_active_and_valid_plugins() {
 }
 
 /**
 }
 
 /**

- * Sets internal encoding using mb_internal_encoding().
+ * 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.
+ * 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.

  *
  *

- * @access private

  * @since 3.0.0
  * @since 3.0.0

+ * @access private

  */
 function wp_set_internal_encoding() {
        if ( function_exists( 'mb_internal_encoding' ) ) {
  */
 function wp_set_internal_encoding() {
        if ( function_exists( 'mb_internal_encoding' ) ) {

-               if ( !@mb_internal_encoding( get_option( 'blog_charset' ) ) )
+               $charset = get_option( 'blog_charset' );
+               if ( ! $charset || ! @mb_internal_encoding( $charset ) )

                        mb_internal_encoding( 'UTF-8' );
        }
 }
 
 /**
                        mb_internal_encoding( 'UTF-8' );
        }
 }
 
 /**

- * Add magic quotes to $_GET, $_POST, $_COOKIE, and $_SERVER.
+ * Add magic quotes to `$_GET`, `$_POST`, `$_COOKIE`, and `$_SERVER`.

  *
  *

- * Also forces $_REQUEST to be $_GET + $_POST. If $_SERVER, $_COOKIE,
- * or $_ENV are needed, use those superglobals directly.
+ * Also forces `$_REQUEST` to be `$_GET + $_POST`. If `$_SERVER`,
+ * `$_COOKIE`, or `$_ENV` are needed, use those superglobals directly.

  *
  *

- * @access private

  * @since 3.0.0
  * @since 3.0.0

+ * @access private

  */
 function wp_magic_quotes() {
        // If already slashed, strip.
  */
 function wp_magic_quotes() {
        // If already slashed, strip.


@@ -526,63 +599,241 @@ function wp_magic_quotes() {
 /**
  * Runs just before PHP shuts down execution.
  *
 /**
  * Runs just before PHP shuts down execution.
  *

- * @access private

  * @since 1.2.0
  * @since 1.2.0

+ * @access private

  */
 function shutdown_action_hook() {
  */
 function shutdown_action_hook() {

+       /**
+        * Fires just before PHP shuts down execution.
+        *
+        * @since 1.2.0
+        */

        do_action( 'shutdown' );
        do_action( 'shutdown' );

+

        wp_cache_close();
 }
 
 /**
  * Copy an object.
  *
        wp_cache_close();
 }
 
 /**
  * Copy an object.
  *

- * Returns a cloned copy of an object.
- *

  * @since 2.7.0
  * @since 2.7.0

+ * @deprecated 3.2.0

  *
  *

- * @param object $object The object to clone
- * @return object The cloned object
+ * @param object $object The object to clone.
+ * @return object The cloned object.

  */
 function wp_clone( $object ) {
  */
 function wp_clone( $object ) {

-       static $can_clone;
-       if ( !isset( $can_clone ) )
-               $can_clone = version_compare( phpversion(), '5.0', '>=' );
-
-       return $can_clone ? clone( $object ) : $object;
+       // Use parens for clone to accommodate PHP 4. See #17880
+       return clone( $object );

 }
 
 /**
 }
 
 /**

- * Whether the current request is in WordPress admin Panel
+ * Whether the current request is for an administrative interface page.

  *
  *

- * 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.
+ * Does not check if the user is an administrator; {@see current_user_can()}
+ * for checking roles and capabilities.

  *
  * @since 1.5.1
  *
  *
  * @since 1.5.1
  *

- * @return bool True if inside WordPress administration pages.
+ * @global WP_Screen $current_screen
+ *
+ * @return bool True if inside WordPress administration interface, false otherwise.

  */
 function is_admin() {
  */
 function is_admin() {

-       if ( defined( 'WP_ADMIN' ) )
+       if ( isset( $GLOBALS['current_screen'] ) )
+               return $GLOBALS['current_screen']->in_admin();
+       elseif ( defined( 'WP_ADMIN' ) )

                return WP_ADMIN;
                return WP_ADMIN;

+

        return false;
 }
 
 /**
        return false;
 }
 
 /**

- * Whether Multisite support is enabled
+ * 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
+ *
+ * @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; {@see 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
+ * {@see 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
  *
  *
  * @since 3.0.0
  *

- * @return bool True if multisite is enabled, false otherwise.
+ * @return bool True if Multisite is enabled, false otherwise.

  */
 function is_multisite() {
        if ( defined( 'MULTISITE' ) )
                return MULTISITE;
 
  */
 function is_multisite() {
        if ( defined( 'MULTISITE' ) )
                return MULTISITE;
 

-       if ( defined( 'VHOST' ) || defined( 'SUNRISE' ) )
+       if ( defined( 'SUBDOMAIN_INSTALL' ) || defined( 'VHOST' ) || defined( 'SUNRISE' ) )

                return true;
 
        return false;
 }
 
                return true;
 
        return false;
 }
 

-?>
+/**
+ * Retrieve the current blog ID.
+ *
+ * @since 3.1.0
+ *
+ * @global int $blog_id
+ *
+ * @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 string    $text_direction
+ * @global WP_Locale $wp_locale      The WordPress date and time locale object.
+ *
+ * @staticvar bool $loaded
+ */
+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();
+}