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

You can change the cookie name for your new session using session_name() before session_start() and let the problem solve itself in a few days.

session_name("SESSION_ID");
session_start();