how to run shell script with php script

my mind is going to explode soon.

im going crazy trying to figure this out.

i want to be able to create a directory on all my website, but because when you run a scrip in php, it runs it as the user apache and ofcourse, the other pages are different user so when i try to execute the php script, it fails because it says i dont have permissions.

i was wondering if there is a way to run a php scrip at root?

thanks.