plz help. because i cannot configure the config.php(php-nuke 7.2):

$dbhost = "localhost";
$dbuname = "root";
$dbpass = "";
$dbname = "nuke";
$prefix = "nuke";
$user_prefix = "nuke";
$dbtype = "MySQL";
$sitekey = "SdFk*fa28367-dm56w69.3a2fDS+e9";
$gfx_chk = 7;
$subscription_url = "";