I'm trying to find a solution to this problem: I have a page on a php application that can't be opened more than once to avoid session overwrite. I'm spending a lot of time without finding any solution!
The last one I tried is to use the jquery "load" and "unload" events on the window. It works fine if I open the same page in a new window or a new tab but it also blocks the page if I refresh it!
I really don't know how to go on! I thought this was a simple example of semaphore usage...but I can't code it in the right way.
Any suggestions? (both php and js solutions are welcome)