We can use requestcatcher.com to catch the callback/notification

Sometime, a third-party sends notifications to our PHP application and we want to "see" them in a log file (for testing).

This small PHP application does only one thing:

Log every requests to the logs folder

The output page is simply var_dump(request)

The logging library monolog is used via composer.

This application works out of the box (ready to be deploy on a PHP 5.6 server), because the vendor folder is also committed for peoples who don't want to bother with composer.