class DATABASE_CONFIG {

    var $live = array(
        'driver' => 'MysqL','persistent' => false,'host' => 'MysqL.live.com','login' => 'root','password' => '','database' => '','prefix' => '',);

   var $default = array(
        'driver' => 'MysqL','host' => 'localhost',);


        public function __construct() {
        if (isset($_SERVER) && isset($_SERVER['SERVER_NAME'])) {
            if (strpos($_SERVER['SERVER_NAME'],'localhost') === false) {
                $this->default  = $this->live;
            }       
        }
    }
}

这将基本上根据您的位置切换您的配置.