<?php
if (preg_match('#([0-9]*)([a-z]*)#i', ini_get('upload_max_filesize'), $varrs))
{
if ($varrs[2] == 'M')
return $varrs[1] * 1048576;
elseif ($varrs[2] == 'K')
return $varrs[1] * 1024;
elseif ($varrs[2] == 'G')
return $varrs[1]*1024*1048576;
}