PHP MySQL Connectivity

Hi there, this is probably a very basic question but I cannot seem to find the answer on google…

I have installed MySQL and Apache on the cloud server and trying to run a PHP program to indicate whether the connection to a database I have created was successful. I have written the PHP (below) on my personal computer and uploaded the file to the web host I use which is godaddy. For some reason every time I reference this PHP file in the URL the page is blank in the web browser (all my other non database PHP files work ok).

Sorry if this is not clear but could someone please help? I am expecting to see the connection to the database in the cloud was successful!

<?php
$host = 'xxx'; //188.166.....
$user = 'root';
$pass = 'yyy';
$db = 'zzz';

$conn=mysqli_connect($host,$user,$pass,$db);

if($conn)
{
	echo "Connection Successful";
}
else
{
	echo "Could not connect";
}
?>

Thanks,

Alex.