Alternative To & In Url

I have a URL which may look like this:

At the same I have a problem using "&" as the separator between different values in a URL. I tried using "%26" but that will not act as a separator when using $_GET["id"] etc. I also tried with ";". Is there any other alternative to & to be used as a URL separator?

You shouldn’t change that, it’s the standard. What’s your problem with it?