Try this. Maybe yours needs the php in the code tag. Mine didn't, and it is still working.
<?php
$temp1 = $HTTP_GET_VARS['temp1'];
?>
<html>
<body>
test server page
<?php echo('temp1 = ' . $temp1 . ' '); ?>
</body>
</html>
edit: It also looks like HTTP_GET_VARS has been deprecated. Try this:
<?php
$temp1 = $_GET['temp1'];
?>
<html>
<body>
test server page
<?php echo('temp1 = ' . $temp1 . ' '); ?>
</body>
</html>