PHP webpage doesn't launch unix command even after updated sudoers

Question

Basically I am trying to restart a service from a php web page.

Here is the code:

Answer 1

The problem is not with sudo at the moment, but with SELinux, which is (reasonably) set to deny the HTTPD from gaining root privileges.
You will need to either explicitly allow this (you can use audit2allow for this), or set SELinux to be permissive instead. I'd suggest the former.