write some javascript with php and have the page refresh itself:
if(isset($_GET['client_time'])){
echo('it is '.$_GET['client_time'].' where you are');
}else {
echo("<script language=\"Javascript\">");
echo('location.href="'.$PHP_SELF.'?client_time="+Date()');
echo('</script>');
}
or something like that {):-)
double check the format of your $_GET variables before printing them. can be a security risk.