形式1：	index.php?m=article&a=show&id=1 index.php?m=article&a=show&id=1
形式2：	http://www.ikphp.com/index.php/article/show/id/1 (暂只支持apache环境的rewrite，非apache环境勿动) http://www.ikphp.com/index.php/article/show/id/1 (暂只支持apache环境的rewrite，非apache环境勿动)
形式3：	http://www.ikphp.com/article/show/id/1 (暂只支持apache环境的rewrite，非apache环境勿动) http://www.ikphp.com/article/show/id/1 (暂只支持apache环境的rewrite，非apache环境勿动)