session.gc_probability

INI • INI default value changed in 8.5

Session: session.gc_probability — Defines the probability that the 'garbage collection' process is started on every session initialization. The probability is calculated by using gc_probability/gc_divisor, e.g. 1/100 means there is a 1% chance that the GC process starts on each request.


Default value	1
Development value	1
Production value	1

Modifiability: INI_ALL - The session.gc_probability INI directive can be configured anywhere, including php.ini files, ini_set calls, Apache .htaccess files, per-directory .ini files, etc.

PHP 5

PHP 7

PHP 8.0

PHP 8.1-8.2

PHP 8.3

PHP 8.4

PHP 8.5

Changed

PHP 8.6

[Session]
session.gc_probability = 1

Changes to the `session.gc_probability` INI

PHP 8.5

INI directive default value changed from 0 to 1

PHP 5.6

INI directive default value changed from 1 to 0