To check the PHP configuration settings on your web server, you may use phpinfo(), which is commonly used to check configuration settings and for available predefined variables on a given system. Also, phpinfo() is a valuable debugging tool as it contains all EGPCS (Environment, GET, POST, Cookie, Server) data.
You may create a php file (info.php) with the sample coding below to browse the informations on your web browser. Sample Coding: info.php