what are common files on a web server that can be misconfigured and provide useful...

The php.ini file may be a special file for PHP. it’s where you declare changes to your PHP settings. The server is already configured with standard settings for PHP, which your site will use by default. Unless you would like to vary one or more settings, there’s no got to create or modify a php.ini file. If you’d wish to make any changes to settings, please do so through the MultiPHP INI Editor.