Exec() wont run program

I want to start up a program through a php page. For example, gedit. I found that the user is apache by running this: - passthru('whoami'); since apache might not have access to run a certain command, I'll use sudo. I edited the sudoers file in /etc/sudoers and underneath the line: # User privilege specification, I added: apache ALL=(ALL) NOPASSWD: ALL which would give apache access to run any command without a password. So in my php file the line looks like this: exec("sudo gedit"); And it doesn't do anything. Any suggestions.