Zend_Http_Client::_setParameter PHP Method

    protected function _setParameter($type, $name, $value)
    {
        $parray = array();
        $type = strtolower($type);
        switch ($type) {
            case 'get':
                $parray =& $this->paramsGet;
                break;
            case 'post':
                $parray =& $this->paramsPost;
                if ($value === null) {
                    if (isset($this->body_field_order[$name])) {
                        unset($this->body_field_order[$name]);
                    }
                } else {
                    $this->body_field_order[$name] = self::VTYPE_SCALAR;
                }
                break;
        }
        if ($value === null) {
            if (isset($parray[$name])) {
                unset($parray[$name]);
            }
        } else {
            $parray[$name] = $value;
        }
    }