I've got php4.06, Build Date Jun 22 2001, and when i try to run the following script:

<?
if (!register_shutdown_function("end_func"))
   echo("register_shutdown_function doesn't work...");
function end_func() {
echo("This is the end of the script"); }
?>

it outputs 

register_shutdown_function doesn't work...

When i had an older version of PHP (i think it was three) i worked perfectly, but now that i've upgraded, the very same script doesn't work anymore...

i have phpdev4 as server(http://www.firepages.com.au/phpdev4.htm)