execute command with php

[GatekeeperCruelman]

Hello all,
I'm trying to execute a few commands on linux with php from a webbrowser.
I found the commands and the php functions, but for some reason the output will not come on the screen, but when I use the same command for that user in the commandline I get output

I changed with "visudo" so that the apache user can use the sudo commands.

This is the code I tried:

 <?php
$result = shell_exec("sudo -u root /etc/init.d/yum-cron restart");
print $result;
?>  

[nidhinmd]

U just try this code

<?php
$output = shell_exec("ls -lart");
print $output;
?>

[GatekeeperCruelman]

Thanks for the response but I found the problem.
It wasn't php.

in visudo there is this line:

Defaults    requiretty

this prevents that you can run the sudo command without an actual interface (like PuTTY or just your actual computer)

So the problem was the sudo command it self. Everything is working like it should be.
Thanks again for the response.

[Lakshmipathi]

Thanks for the response but I found the problem.
It wasn't php.

in visudo there is this line:

Defaults    requiretty

this prevents that you can run the sudo command without an actual interface (like PuTTY or just your actual computer)

So the problem was the sudo command it self. Everything is working like it should be.
Thanks again for the response.

Just curious,Why can't you try to open a terminal and execute restart command using option xterm -e

[GatekeeperCruelman]

I'm working on a project and a normal user need to access the linux through a webbrowser. Most of those users are used to windows, or doesn't have much experience with a computer at all. So I'm making an user-friendly interface where they can do a few actions that are needed to configure a few parts in Linux and a few programs.

We don't wanna do every single action for every user (I'm talking about thousands of users)

We also want it too be easy installed, or better no install.

I hope this answer will explain the "Why"