Running shell script using PHP over http

Question

OS - Ubuntu 14.04 Well I am working on deployment using GIT webhooks for it. I havea added the deployment keys to git repo and now I want to trigger the git pull origin master command when a push happens from my local repo. This is the test.php file I call via browser.

<?php       
    //echo "THis is a test file on a test repo for testing the deploy functionality using github webhooks!!!!";
    echo exec('whoami');
    echo exec('sh -x /var/www/iq/deploy-test/git.sh');
?>

the shell file

#!/bin/bash
cd /var/www/proj-dir/deploy-test
git pull origin master

When I run this on terminal using

php test.php I get the correct result as expected

 ubuntu From github.com:repo/test
 * branch            master     -> FETCH_HEAD
 Already up-to-date.

ubuntu for whoami and the git pull output.

Now heres the issue when I call the same http://example.com/test.php on browser it shows the user or whoami output as www-data,which is apache user,but I tried updating the permissions of the php file to execute and changing the user to www-data but did not work.
What updates do I need to make so the file works via browser request?

If I need to update the sudoers file what should be the updates?

Answer 1

I got it working.In my case,I was missing the authorized_keys and the known_hosts files in my www-data users root folder.I added .ssh folder under /var/www/.ssh. I previously only moved the ssh key files hence I faced the issue for not able to connect to the git repository over http.