How do I delete PHPSESSID on client computers

Question

UPDATE ON THE PROBLEM:

• On some browsers, we have two PHPSESSIDs.
• One PHPSESSID is not set by me anywhere in my script
• It has

Answer 1

If you send manually the header with new expiring date for desired path, the client should remove it.

session_start();
header("Set-Cookie:PHPSESSID=".session_id()."; expires=Sat, 07-Nov-1999 14:58:07 GMT; path=/cv/");

The first time, you have the old cookie path, but from the second page call only the cookie in path / will be stored and transmitted.

You can send this header when you know if the client is affected by this problem or having this for some month.