Horde_Perms_Permission::setPerm PHP Method

    public function setPerm($permId, $permission, $update = true)
    {
        if (is_array($permId)) {
            if (empty($permId['name'])) {
                return;
            }
            if ($this->get('type') == 'matrix' && isset($this->data[$permId['class']][$permId['name']])) {
                $this->data[$permId['class']][$permId['name']] |= $permission;
            } else {
                $this->data[$permId['class']][$permId['name']] = $permission;
            }
        } else {
            if ($this->get('type') == 'matrix' && isset($this->data[$permId])) {
                $this->data[$permId] |= $permission;
            } else {
                $this->data[$permId] = $permission;
            }
        }
        if ($update) {
            $this->save();
        }
    }