function drupal_session_start

Starts a session forcefully, preserving already set session data.

Related topics

File

includes/session.inc, line 284

Code

function drupal_session_start() {
    // Command line clients do not support cookies nor sessions.
    if (!drupal_session_started() && !drupal_is_cli()) {
        // Save current session data before starting it, as PHP will destroy it.
        $session_data = isset($_SESSION) ? $_SESSION : NULL;
        // Apply any overrides to the session cookie params.
        $params = $original_params = session_get_cookie_params();
        // PHP settings for samesite will be handled by _drupal_cookie_params().
        unset($params['samesite']);
        $params = _drupal_cookie_params($params);
        if ($params !== $original_params) {
            if (\PHP_VERSION_ID >= 70300) {
                session_set_cookie_params($params);
            }
            else {
                session_set_cookie_params($params['lifetime'], $params['path'], $params['domain'], $params['secure'], $params['httponly']);
            }
        }
        session_start();
        drupal_session_started(TRUE);
        // Restore session data.
        if (!empty($session_data)) {
            $_SESSION += $session_data;
        }
    }
}