Horde_Group_Ldap::_listGroups PHP Method

    protected function _listGroups($user)
    {
        $attr = $this->_params['gid'];
        try {
            if (!empty($this->_params['attrisdn'])) {
                $user = $this->_ldap->findUserDN($user);
            }
            $filter = Horde_Ldap_Filter::create($this->_params['memberuid'], 'equals', $user);
            $filter = Horde_Ldap_Filter::combine('and', array($this->_filter, $filter));
            $search = $this->_ldap->search($this->_params['basedn'], $filter, array($attr));
        } catch (Horde_Ldap_Exception $e) {
            throw new Horde_Group_Exception($e);
        }
        $entries = array();
        foreach ($search->sortedAsArray(array($attr)) as $entry) {
            $entries[$entry['dn']] = $entry[$attr][0];
        }
        return $entries;
    }