Why is the session not saved?

Question

PHP

I save the sessions in the database, take it from there, everything is fine, but when the page is updated, a new session is generated,
with a new session_id ...
as if the cookie storing the session ID is immediately deleted, although I set the lifetime:

session_set_save_handler(...);
ini set...
ini_set('session.gc_maxlifetime',259200);// пробовал и time()+259200
ini_set('session.cookie_lifetime',259200);// пробовал и time()+259200
ini_set....

session_start();

Here is the complete session mechanism: Click
More precisely does not save the session ID, the session itself is saved..
and generates a new ID when refreshed.
How to fix?

Answer 1

session_start?

Answer 2

session_start() is placed at the very top
, because first you enable the session mechanism, and then you assign them

Answer 3

It's decided.
It turned out that one of the components clears cookies under certain conditions...
And deleted the session identifier, I'm sorry..
Thank you all for your help)