Gdn_Session::setPermission PHP Method

    public function setPermission($PermissionName, $Value = null)
    {
        if (is_string($PermissionName)) {
            if ($Value === null || $Value === true) {
                $this->permissions->overwrite($PermissionName, true);
            } elseif ($Value === false) {
                $this->permissions->overwrite($PermissionName, false);
            } elseif (is_array($Value)) {
                $this->permissions->overwrite($PermissionName, $Value);
            }
        } elseif (is_array($PermissionName)) {
            if (array_key_exists(0, $PermissionName)) {
                foreach ($PermissionName as $Name) {
                    $this->permissions->set($Name, true);
                }
            } else {
                foreach ($PermissionName as $Name => $Value) {
                    $this->permissions->set($Name, $Value);
                }
            }
        }
    }