Description: Defines the functions required to load WP.
1) wp_unregister_globals (), close ' GLOBALS ', ' _get ', ' _post ', ' _cookie ', ' _request ', ' _server ', ' _env ', ' _files ', ' Table_ Global registry variables other than prefix '.
2) Wp_fix_server_vars (), prepare $_server variables for various installation methods (for example, in different environments such as IIS, Apache, etc.).
3) wp_check_php_mysql_versions (), check the PHP version, MySQL extension, and database drop-in.
4) wp_maintenance (), check whether WP is in maintenance mode (such as during the upgrade process), if the conditions are met, then terminate the program and generate a maintenance information.
5) Timer_start (), standard system time capture mode in PHP4.
6) timer_stop ($display = 0, $precision = 3), returns the time, and when $display = 1 o'clock output time.
7) Wp_debug_mode (), set the error handling method of PHP and WP debug mode.
8) Wp_set_lang_dir (), set constant Wp_lang_dir, which is the folder where the language files are located.
9) Wp_set_wpdb_vars (), sets the database table prefix and the format specifier for the database table column.
Wp_start_object_cache () to open the object cache. If the object-cache.php file exists in the Wp-content folder, use him as the extended object cache.
One) wp_not_installed (), if WP is not installed, start the installer.
Wp_get_mu_plugins (), returns the Must-use plug-in file array, the default Must-use plugin in the Wp-content/mu-plugins directory, if you want to modify the default directory, you can configure the wp-config.php file in the Wpmu_plugin_dir and Wpmu_plugin_url constants.
Wp_get_active_and_valid_plugins (), returns an array of valid plug-in files for activation, the default plugin in the Wp-content/plugins directory, if you want to modify the default directory, you can configure the wp-config.php file in the Wp_plugin_dir and Wp_plugin_url constants.
Wp_set_internal_encoding (), using the mb_internal_encoding () function to set the internal encoding method, the default setting is UTF-8.
Wp_magic_quotes (), add magic References to $_get, $_post, $_cookie, and $_server.
() Shutdown_action_hook (), triggering the mount point do_action (' Shutdown '), which runs before PHP closes execution.
Wp_clone ($object), clone the object. Cloning succeeds only in versions above PHP5, otherwise the original object is returned.
Is_admin (), returns whether the current request is in the management panel of WP.
Is_multisite (), returns whether multiple sites are supported.
Decryption: wp-includes/load.php