I am a PHP developer working on a project where I need to modify the output of a particular script. I came across the `output_add_rewrite_var()` function in the PHP documentation and I'm unsure how to use it properly. I'm hoping someone here can provide me with some guidance and maybe even an example of how to use this function.
Can someone please explain the purpose and usage of the `output_add_rewrite_var()` function in PHP? Are there any specific parameters that need to be passed to this function? I would also appreciate it if you could provide a code example to illustrate its usage.
Thank you in advance for your help!

I stumbled upon this question while searching for a solution to a similar problem I faced with modifying URLs in PHP. After some research and experimentation, I found that the `output_add_rewrite_var()` function can be quite handy.
I was working on a project where I needed to dynamically add query parameters to the URLs generated by my script. The challenge was that these URLs were being used in different parts of the application. Instead of manually modifying each URL, I wanted a more efficient way to add or update query parameters.
By utilizing the `output_add_rewrite_var()` function, I was able to achieve this. This function allows you to append or modify query parameters, eliminating the need for manual URL manipulation. One thing to note is that this function is specifically designed for adding or rewriting query parameters within the output buffer.
In my case, I had a script generating URLs with existing query parameters, but I needed to add a new parameter called "category" with a dynamic value to these URLs. By using `output_add_rewrite_var()`, I easily accomplished this task. Here's an example:
With this code, the "category" parameter and its corresponding dynamic value would be included in all subsequent URLs generated by my script.
Remember to call this function before any output is sent to the browser, ensuring its effectiveness. You can place it at the beginning of your script or a relevant configuration file.
I hope sharing my personal experience sheds more light on how to utilize `output_add_rewrite_var()` effectively. If you have any further queries, feel free to ask!