Unable to adjust php.ini max upload size directive on Centos 6.3

Unable to adjust php.ini max upload size directive on Centos 6.3

Currently i'm setting up Centos 6.3 (64 bit) on vm and installing
Wordpress: Already adjust /etc/php.ini but seems like overwritten by other
settings.
Suspect this is due to selinux feature. My goal is setting up all
Wordpress with all feature working like Media files folder creation
(permission issue), appropriate max memory and max upload size.
Any suggestion welcome. Thanks.
OS environment snapshot: Linux 2.6.32-279.el6.x86_64 #1 SMP Fri Jun 22
12:19:21 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux Apache/2.2.15 (Unix)PHP
5.3.3 (cli) (built: Jul 12 2013 20:35:47) Zend Engine v2.3.0 MySQL
version: 5.1.61 Source distribution