function session_cache_get_sid in Session Cache API 7

Same name and namespace in other branches

1. 8 session_cache.module \session_cache_get_sid()
2. 6 session_cache.module \session_cache_get_sid()

Returns an identifier for the current user session.

Typically only called when a database or file-based storage mechanism is employd.

Return value

int session cache id

4 calls to session_cache_get_sid()

session_cache_file_session_cache_get in session_cache_file/session_cache_file.module

Implements hook_session_cache_get().

session_cache_file_session_cache_set in session_cache_file/session_cache_file.module

Implements hook_session_cache_set().

session_cache_get in ./session_cache.module

Read data from the user session, given its bin id.

session_cache_set in ./session_cache.module

Write data to the user session, whatever the storage mechanism may be.

File

./session_cache.module, line 139

session_cache.module

Code

function session_cache_get_sid() {
  global $user;
  $sid_source = variable_get('session_cache_sid_source', SESSION_CACHE_COOKIE_FOR_SID);
  if ($sid_source == SESSION_CACHE_IP_ADDRESS_FOR_SID) {

    // Do we want '::1' for localhost or dots in file names?
    $sid = ip_address();
    return $sid == '::1' ? 'localhost' : $sid;
  }

  // SESSION_CACHE_UID_FOR_SID falls back on cookie for anonymous users.
  if ($sid_source == SESSION_CACHE_UID_FOR_SID && !empty($user->uid)) {

    // Fine if concurrent sessions for the same auth. user are NOT required.
    return 'user' . $user->uid;
  }
  if (empty($_COOKIE['Drupal_session_cache_sid'])) {

    // Don't use core's session id. Security not a problem, so keep it short.
    $sid = drupal_substr(session_id(), 0, 12);
    global $cookie_domain;

    // .localhost causes problems
    $cdom = $cookie_domain == '.localhost' ? ini_get('session.cookie_domain') : $cookie_domain;

    // If setcookie() fails, then everything still works, but a new session will
    // be created when logging in or out.
    setcookie('Drupal.session_cache.sid', $sid, session_cache_expiration_time(), '/', $cdom, NULL, TRUE);

    // Need to also set $_COOKIE explicitly, see [#2210329].
    $_COOKIE['Drupal_session_cache_sid'] = $sid;
  }
  else {
    $sid = $_COOKIE['Drupal_session_cache_sid'];
  }
  return $sid;
}