我用snoopy类的时候，伪装代理如下：
$snoopy->agent = (compatible; msie 4.01; msn 2.5; aol 4.0; windows 98)
可是我输出$_server[http_user_agent]
代理还是我浏览器的代理，根本就没变？请各位给点意见
------解决方案--------------------
$snoopy->agent = (compatible; msie 4.01; msn 2.5; aol 4.0; windows 98);
$snoopy->fetch('xxx.php');
echo $snoopy->results;
在xxx.php里写
echo $_server[http_user_agent];