Was google down or do you just keep posting easily answered questions to get your signature shown?
https://www.google.com/search?q=How+...and+within+PHP

I'll leave this here for the rare occasion that Google and Yahoo are both down:

How to call Linux command within PHP - Bing

You can use system command to execute linux command within the php

To call Linux command within PHP, you can do with Execute Linux commands in PHP by using backticks. Do according with this script for example :

<?php
#extractarchive.php
echo `tar -xvfz somearchive.tar.gz`;
?>

Hope can help your question.