(PHP 5 >= 5.4.0, PHP 7, PHP 8)
session_status — Returns the current session status
session_status(): int
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.
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https://www.php.net/manual/en/function.session-status.php