//ThinkPHP常用系统变量  
 
//PHP系统变量
{$Think.server.script_name}        //   /demo/index.php 
{$Think.sesssion.admin}            //输出session名为admin的值
{$Think.cookie.user}               //输出cookie名为user的值
{$Think.get.user}                  //输出GET值
{$Think.post.user}                 //输出post值
{$Think.request.user}              //输入所有请求值

//ThinkPHP的系统变量
{$Think.const.APP_PATH}        //    ./Weibo/   主目录地址
{$Think.config.url_model}      //URL模式
{$Think.lang.var_error}        //语言变量