This plugin does work up to WordPress 4.0. It works — this means that it writes the rules to your php5.ini and/or to your php.ini. If the .ini file does not exist, it will create the file and then write the rules on it. This is all the plugin does. However, some web hosts IGNORE the settings on your php5.ini or php.ini. That is out of our control.
If you have a web host that ignores PHP ini rules set in these .ini files, that is no reason to give this plugin a bad rating. You have the option of posting your problem in the forum, and 9 times out of 10, I will help you solve your web-host-related problem.
