$this->_get('id'); 正常;
$this->_param('id'); 为空;
Lib\Core\Action.class.php 258行处;
=======================================
$params = $_GET[C('VAR_URL_PARAMS')];
$input = array_merge($input,$params);
修改为：
if($params = $_GET[C('VAR_URL_PARAMS')]){
$input = array_merge($input,$params);
}