$host = $_POST['host'];
$username = $_POST['username'];
$password = $_POST['password'];
$db = $_POST['db'];
$code = "
$result = mysql_connect(\"$host\",\"$username\",\"$password\");
mysql_select_db(\"$db\");
if (!$result) echo \"No Connection\";
?>";
touch("connect.php",0777);
$fh = fopen("connect.php","w");
fwrite($fh,$code);
fclose($fh);
chmod("connect.php",0644);
?>