Iframe src caching issue on firefox

Question

I have an iframe element with a random scr attribute. When I do refresh the page every time, the iframe should load the page with different query parameters based on the src att

Answer 1

Your code in PHP executes once and sends the content to the browser. When you refresh the page, the code doesn't run again in the server, because it is served by the cache. So the src of the iframe uses the same random number.

To avoid this you need to disable caching of the original page (not the iframe). Or you could have the random number generated in the client side (using javascript) so that is unique every time.