Changing upload max filesize on PHP

Question

When I run this code:

<?php
ini_set('upload_max_filesize', '10M');
echo ini_get('upload_max_filesize'), ", " , ini_get('post_max_size')

It returns:

2M, 8M

This is despite my php.ini setting these higher:

upload_max_filesize = 10M
post_max_size = 10M

The error occurs after setting the value as well as it is set in php.ini I'm inclined to think it's a bug. Can someone please tell me what I am doing wrong here?