function drupal_session_start in Drupal 7

Starts a session forcefully, preserving already set session data.

Related topics

5 calls to drupal_session_start()

drupal_session_commit in includes/session.inc

Commits the current session, if necessary.

drupal_session_initialize in includes/session.inc

Initializes the session handler, starting a session if needed.

drupal_session_regenerate in includes/session.inc

Called when an anonymous user becomes authenticated or vice-versa.

update.php in ./update.php

Administrative page for handling updates from one Drupal version to another.

_drupal_session_regenerate_existing in includes/session.inc

Regenerates an existing session.

File

includes/session.inc, line 281

User session handling functions.

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;
    }
  }
}