PHP If / Else Statement

What I’m trying to do is put an advertising script into my header but I want select users to not be subject to the script. The only way I could think of doing this would be using an “If/Else Statement” but I’m very new to php and haven’t gotten it to work.

This is what I have so far…

<?php
if ($user == ‘Admin’) {
echo ”;
} else {
echo ‘<script type=”text/javascript” src=”https://www.thatsprime.com/Webservices/jsParseLinks.aspx?id=05bf2f98″></script>&#8217;;
} //end if

Anyone know what is wrong/what I could do to fix this?