/**
* Lists all available scopes.
*
* @return array The list of scopes stored in the backend.
*/
public function listScopes()
{
$query = 'SELECT ' . $this->_db->distinct('pref_scope') . ' FROM ' . $this->_params['table'];
try {
return $this->_db->selectValues($query);
} catch (Horde_Db_Exception $e) {
throw new Horde_Prefs_Exception($e);
}
}
