When you call your connectToDB() function insert your details instead of 'user1' etc.
connectToDB('freesql.org', 'user1', 'pass1' , 'db_name');
function connectToDB($host, $uname, $pass, $db_name) {
$db = mysql_pconnect($host, $uname, $pass) or die('Failed to connect to db server');
mysql_select_db($db_name) or die('Failed to select db');
return $db;
}
Hope this helps 😉