mysql database connection using php

ezyro_20017256

I am unable to connect mysql database using php page.
Please check the following parameters and suggest.

$mysql_hostname = "sql311.ezyro.com";
$mysql_user = "ezyro_20017256";
$mysql_password = "";
$mysql_database = "ezyro_20017256_sasproj";
$bd = mysql_connect($mysql_hostname, $mysql_user, $mysql_password)

Thanks.