Connection problem in establish connection in domain

See more:

PHP

I run the php code on wamp server it runs fine..

but when i tried to run on my webhosting..
i am having an error establishing connecition.

here is the code

$dbhost = "localhost";// here  i think is problem


$dbuser = "suntafun_user";


$dbpass = "******";

$dbname = "suntafun_first";

$conn = mysql_connect($dbhost, $dbuser, $dbpass) or die ('Error connecting to mysql');

mysql_select_db($dbname) or die ('Unable to select database!');

?>

i think the problem is in db host.. anyone please help