Testing the Session Garbage Collection Process in PHP

Q

How To Test the Session Garbage Collection Process in PHP?

✍: FYIcenter.com

A

In order to test the session garbage collection process, you need to change the settings to expire session variables in 10 seconds and run the process on every request:

session.gc_probability = 1
session.gc_divisor     = 1
session.gc_maxlifetime = 10

If you re-run the first_page.php and next_page.php scripts presented in the previous tutorials, you will see some thing like:

Query string of the incoming URL: 
Cookies received:
  PHPSESSID = grm557vicj1edmiikgsa8hbd11
Value of MyLogin has been retrieved: FYICenter
Value of MyColor has been retrieved: Blue

Wait for 10 seconds, and start another browser window to run first_page.php. This is to trigger the session garbage collection process to remove values stored in session grm557vicj1edmiikgsa8hbd11.

Go back to the first browser window on second_page.php, and click the browser refresh button, you will get something like:

Query string of the incoming URL: 
Cookies received:
  PHPSESSID = grm557vicj1edmiikgsa8hbd11
Value of MyLogin has been retrieved: 
Value of MyColor has been retrieved: 

As you can see, session values are gone, the browser is still sending the same session ID as a cookie, but the all session values are expired (actually, the session file is removed by the garbage collection process).

 

Understanding and Using Sessions in PHP

⇒⇒PHP Tutorials

2016-10-24, 288👍, 0💬