What are the possible return values of the session_status() function in PHP?

The session_status() function in PHP returns the current status of the session. The possible return values are PHP_SESSION_DISABLED if sessions are disabled, PHP_SESSION_NONE if sessions are enabled, but no session exists, and PHP_SESSION_ACTIVE if sessions are enabled, and a session exists. To check the current status of the session in PHP, you can use the session_status() function. This can be useful for determining whether sessions are enabled, disabled, or if a session is currently active. Here is an example code snippet that demonstrates how to use the session_status() function:

$status = session_status();

if ($status == PHP_SESSION_DISABLED) {
    echo "Sessions are disabled.";
} elseif ($status == PHP_SESSION_NONE) {
    echo "Sessions are enabled, but no session exists.";
} elseif ($status == PHP_SESSION_ACTIVE) {
    echo "A session is currently active.";
}