(PHP 5 >= 5.4.0, PHP 7, PHP 8)
session_status — Returns the current session status
session_status() is used to return the current session status.
This function has no parameters.
PHP_SESSION_DISABLED
if sessions are disabled.
PHP_SESSION_NONE
if sessions are enabled, but none exists.
PHP_SESSION_ACTIVE
if sessions are enabled, and one exists.