Anytime you make a change to items such as php.ini, you will need to restart your web server (httpd).  FYI: httpd = http daemon.  On our CentOS servers this generally Apache, but could be something else, particularly if you are using LXAdmin as your webhost manager.

For those using our managed servers with root access, here are the commands to do it from the command line:

to restart:

/sbin/service httpd restart

to start:

/sbin/service httpd start

to stop:

/sbin/service httpd stop

If you have purchased WHM / cPanel for your host, then you can always go to WHM and use the "Restart Scripts" for any of the core services including HTTP.

Regards,

Aztech Support