Session timeouts in PHP: best practices

Question

What is the actual difference between session.gc_maxlifetime and session_cache_expire() ?

Suppose I want the users session to be invalid af

Answer 1

To check the current values, this code will be helpful:

$gc_maxlifetime = ini_get('session.gc_maxlifetime');
$gc_probability = ini_get('session.gc_probability');
$gc_divisor     = ini_get('session.gc_divisor');