php Bootstrap file for setting the ABSPATH constant and loading the wp-config.php file. The wp-config.php file will then load the wp-settings.php file, which will then set up the WordPress environment. If the wp-config.php file is not found then an error will be displayed asking the visitor to set up the wp-config.php file. Will also search for wp-config.php in WordPress' parent directory to allow the WordPress directory to remain untouched. @package WordPress Define ABSPATH as this file's directory if ( ! defined( 'ABSPATH' ) ) { define( 'ABSPATH', __DIR__ . '' ); } The error_reporting() function can be disabled in php.ini. On systems where that is the case, it's best to add a dummy function to the wp-config.php file, but as this call to the function is run prior to wp-config.php loading, it is wrapped in a function_exists() check. if ( function_exists( 'error_reporting' ) ) { Initialize error reporting to a known set of levels. This will be adapted in wp_debug_mode() located in wp-includesload.php based on WP_DEBUG. @see httpphp.netmanualenerrorfunc.constants.php List of known error levels. 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 wp-config.php exists in the WordPress root, or if it exists in the root and wp-settings.php doesn't, load wp-config.php. The secondary check for wp-settings.php has the added benefit of avoiding cases where the current directory is a nested installation, e.g. is WordPress(a) and blog is WordPress(b). If neither set of conditions is true, initiate loading the setup process. if ( file_exists( ABSPATH . 'wp-config.php' ) ) { The config file resides in ABSPATH require_once ABSPATH . 'wp-config.php'; } elseif ( @file_exists( dirname( ABSPATH ) . 'wp-config.php' ) && ! @file_exists( dirname( ABSPATH ) . 'wp-settings.php' ) ) { The config file resides one level above ABSPATH but is not part of another installation require_once dirname( ABSPATH ) . 'wp-config.php'; } else { A config file doesn't exist. define( 'WPINC', 'wp-includes' ); require_once ABSPATH . WPINC . 'load.php'; Standardize $_SERVER variables across setups. wp_fix_server_vars(); require_once ABSPATH . WPINC . 'functions.php'; $path = wp_guess_url() . 'wp-adminsetup-config.php'; We're going to redirect to setup-config.php. While this shouldn't result in an infinite loop, that's a silly thing to assume, don't you think If we're traveling in circles, our last-ditch effort is Need more help if ( false === strpos( $_SERVER['REQUEST_URI'], 'setup-config' ) ) { header( 'Location ' . $path ); exit; } define( 'WP_CONTENT_DIR', ABSPATH . 'wp-content' ); require_once ABSPATH . WPINC . 'version.php'; wp_check_php_mysql_versions(); wp_load_translations_early(); Die with an error message. $die = 'p' . sprintf( translators %s wp-config.php __( There doesn't seem to be a %s file. I need this before we can get started. ), 'codewp-config.phpcode' ) . 'p'; $die .= 'p' . sprintf( translators 1 Documentation URL, 2 wp-config.php __( 'Need more help a href=%1$sRead the support article on %2$sa.' ), __( 'httpswordpress.orgsupportarticleediting-wp-config-php' ), 'codewp-config.phpcode' ) . 'p'; $die .= 'p' . sprintf( translators %s wp-config.php __( You can create a %s file through a web interface, but this doesn't work for all server setups. The safest way is to manually create the file. ), 'codewp-config.phpcode' ) . 'p'; $die .= 'pa href=' . $path . ' class=button button-large' . __( 'Create a Configuration File' ) . 'ap'; wp_die( $die, __( 'WordPress › Error' ) ); }