Homepage Only Links

this code displays a link only on the homepage:

<?
$currentpage = $_SERVER[‘REQUEST_URI’];

if ($currentpage == “” || $currentpage == “/” || $currentpage == “/index.php” || $currentpage == “/index.php/”) {
echo “Site sponsored by <a href=’http://www.quickplaysport.com/’ title=’Football Equipment from quickplaysport’>Quickplay Sport</a>”;
}

?>