Trouble using posix_kill in php

Question

I\'m using php 5.5.11 and when I try to call posix_kill I get the following error:
Fatal error: Call to undefined function posix_kill()

Answer 1

You need to install PHP's posix extension which implements that function. Without that extension the function simply is not defined, which leads to the error.

How to install such an extension package depends on your operating system. Easiest is in Linux where you can search, identify, download and install packages with a single click inside the software management system.