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;
    }
  }
}