I've been working on a PHP project, and I came across the `dir()` function. I've been trying to understand how it works and how I can use it effectively. I've gone through the PHP documentation, but I'm still a bit confused.
Could someone please explain the `dir()` function to me in simple terms and provide an example of how it can be used? I would really appreciate it if you could also provide some personal context or insights based on your own experience with the function.
Thank you in advance!