Why is the session file not deleted after session.gc_max_lifetime expires?

Question

PHP

Hello colleagues! I recently encountered the following problem:
I need the minimum idle time between requests to be 3 seconds (purely for example and clarity)
Here is the server configuration:

session.gc_probability = 1
session.gc_divisor = 1
session.gc_maxlifetime = 3

At this stage, I conclude that the sequence of actions described below will lead to the fact that the browser will be empty, since there is no file on the server anymore.
So, here is the sequence itself:

1. I run the script below
   

   <?php 
                             session_start();
                             $_SESSION["age"] = 100;
                             echo $_SESSION["age"];
   //создать на сервере файл сессии с age==100
                              ?>

   
   
2. 
   I run this script
   

   <?php
   session_start();
   echo $_SESSION["age"];
   ?>
   //в браузере 100

   
   
3. Waiting more than 3 seconds
   
4. Renovate scenario number 2
   

Why is the browser still 100 and not empty. And why is there still a file on the server?
Many thanks in advance to everyone who helps

Answer 1

If the server is Debian or derivatives, then the GC for sessions cannot work there in principle due to access rights restrictions - https://serverfault.com/questions/511609/why-does-...
If you also set session.save_path then there are chances.