Permission denied in Unknown on line 0

[fopetesl]

I have switched my OS from Mandrake 10.0CE to Ubuntu 5.10 (Breezy) and now cannot get even a simple php script to run even with exec()..

<?php
`sudo /sbin/halt`;
?>

Trying to execute the script from Opera,(I need for kiosk), I get the following:
Code:

[highlight]Warning: Unknown(/var/

http://www/html/testshutdown.php):

failed to open stream: Permission denied in Unknown on line 0

Warning: (null)() [function.include]: Failed opening '/var/

http://www/html/testshutdown.php'

for inclusion (include_path='.:/usr/share/php:/usr/share/pear') in Unknown on line 0[/highlight]


I have checked permissions in /etc/sudoers so doesn't seem to be a permission problem.
Also file permission is the same as:

<?php
phpinfo();
?>

which does work.

There are no errors reported by apache.

Using exec() to run the same command gives me the same error.

I do not have either /usr/share/php -or- /usur/share/pear. Should I have?