Allow www-data to execute shell script

I have a shell script called boot.sh on an Ngnix server

I am trying to call it via PHP, but I don't think I have permissions.

How can I give www-data permission to run boot.sh - and only boot.sh

When trying sudo chown or sudo chgrp I am getting Operation Not Permitted

system("whoami"); to get the username of the webserver, I use www-data in this example. Edit your sudoers file and add the following. Where user is the username it will be run under.

www-data ALL=(user) NOPASSWD: /path/to/program/or/script

Then use the following command in PHP.

system("sudo -u user /path/to/program/or/script");