php 判断浏览器类型的源代码

源代码如下所有：

<?php
if(strpos($_SERVER[\'HTTP_USER_AGENT\'],\'MSIE 8.0\'))
  echo \'Internet Explorer 8.0\'; 
 else if(strpos($_SERVER[\'HTTP_USER_AGENT\'],\'MSIE 7.0\')) 
  echo \'Internet Explorer 7.0\'; 
 else if(strpos($_SERVER[\'HTTP_USER_AGENT\'],\'MSIE 6.0\')) 
  echo \'Internet Explorer 6.0\';
 else if(strpos($_SERVER[\'HTTP_USER_AGENT\'],\'Firefox/3\'))
  echo \'Firefox 3\';
 else if(strpos($_SERVER[\'HTTP_USER_AGENT\'],\'Firefox/2\'))
  echo \'Firefox 2\';
 else if(strpos($_SERVER[\'HTTP_USER_AGENT\'],\'Chrome\'))
  echo \'Google Chrome\';
 else if(strpos($_SERVER[\'HTTP_USER_AGENT\'],\'Safari\'))
  echo \'Safari\';
 else if(strpos($_SERVER[\'HTTP_USER_AGENT\'],\"Opera\"))
  echo \'Opera\';
 else echo $_SERVER[\"HTTP_USER_AGENT\"]; 
?>

需要的朋友可以拿去参考一下。