exe() of PHP to run composite

Hi All,

For the past two years I had a script that a friend of mine
helped me to set along with some server settings.


 $cmd="composite -gravity center -size 450x337
-geometry 450x337  +profile '*' -sharpen 0x1 'test.jpg'
-size 450x337 xc:white output.jpg";
 exec("$cmd 2>&1");


However, I had to switch severs, and now I can't get this
script to run through PHP.

I can run this script as ROOT from the command line, and it
works.

But,. with PHP, it doesn't run anymore.

Any pointers? 
# less test.php 
<?php
 $cmd="composite -gravity center -size 450x337
-geometry 450x337  +profile '*' -sharpen 0x1 'test.jpg'
-size 450x337 xc:white output.jpg";
 exec("$cmd 2>&1");
?>

When I run it at user level:

php  test.php

It runs fine and creates the output.jpg file with the user's
ownership which is fine.

But, when I try to initiate this through Apache (i.e. from a
URL link), it doesn't run.
I tried to change ownership to  apache.apache, but it didn't
help.
So,. if you any pointers on how to make this script run NOT
from a SHELL script, but from HTTP, I would be very happy to
hear about this.

Thanks,

-Alon.
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