Create a text file with the following, name it phpinfo.php, put it in the public root directory, and call it from a browser. This will display the php.ini settings.
<?php
// Show all information, defaults to INFO_ALL
phpinfo();
// Show just the module information.
// phpinfo(8) yields identical results.
// phpinfo(INFO_MODULES);
?>
Or, you may download phpinfo.php here, unzip it on your local computer and upload it to your server.