Laravel Telescope
I don't work as often with Laravel (one of the most famous PHP frameworks) so I'm losing my reflexes a bit when it comes to debugging the code, e.g. when it comes to finding the queries that have been executed, the exceptions that have been thrown, the list of keys that have been created or read from the Redis cache, etc.
By installing Laravel Telescope, we can get realtime information about cache, logs, queries and models, exceptions, ... and this will help a lot to understand how the application is working and what is running.
Telescope is a great help for debugging and understanding your application, and installs like a dev dependency.
The last time I developed a Laravel application and installed it on the test server, I was able to follow what my user was doing in real time, see the exceptions he encountered and correct them ... even before he reported them to me.
Thanks to Telescope, not only did I have a perfect view of what was being collected, but I also had all the context: the user didn't have to tell me ‘That doesn't work...’. (without any details); I had everything at hand.