What are the potential reasons for a PHP session to expire prematurely, even when the session lifetime is set to a specific value?

One potential reason for a PHP session to expire prematurely, even when the session lifetime is set to a specific value, could be due to the session garbage collection process. If the garbage collection probability is set too low, it may result in sessions being cleaned up before their actual expiration time. To solve this issue, you can adjust the session.gc_probability and session.gc_divisor values in your php.ini file to increase the probability of garbage collection occurring. 

// Adjust session garbage collection probability
ini_set('session.gc_probability', 1);
ini_set('session.gc_divisor', 1);

Keywords

PHP session expiration premature session lifetime configuration.

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