Multiple wp-config.php files in one home directory
Use one main wp-config.php and name the others according to the name of the host: example.com.config.php example.net.config.php and so on. In your main wp-config.php write: $current_config = __DIR__ . “https://wordpress.stackexchange.com/” . $_SERVER[‘HTTP_HOST’] . ‘.config.php’; if ( file_exists( $current_config ) ) require_once $current_config;