How can the php.ini file currently in use be identified on a server running PHP?

To identify the php.ini file currently in use on a server running PHP, you can create a PHP script that outputs the path to the loaded php.ini file. This can be done by using the php_ini_loaded_file() function in PHP, which returns the path to the loaded php.ini file. By running this script on the server, you can easily determine which php.ini file is being used.

<?php
echo php_ini_loaded_file();
?>