php判断访问者是搜索引擎还是真实用户的代码

2. /**
3. * 判断访问来源 搜索引擎还是真实用户
4. * site bbs.it-home.org
5. */
6. function is_bot()
7. {
8. /* This function will check whether the visitor is a search engine robot */
9. //根据需要扩充此数组
10. $botlist = array("Teoma", "alexa", "froogle", "Gigabot", "inktomi",
11. "looksmart", "URL_Spider_SQL", "Firefly", "NationalDirectory",
12. "Ask Jeeves", "TECNOSEEK", "InfoSeek", "WebFindBot", "girafabot",
13. "crawler", "bbs.it-home.org", "Googlebot", "Scooter", "Slurp",
14. "msnbot", "appie", "FAST", "WebBug", "Spade", "ZyBorg", "rabaz",
15. "Baiduspider", "Feedfetcher-Google", "TechnoratiSnoop", "Rankivabot",
16. "Mediapartners-Google", "Sogou web spider", "WebAlta Crawler","TweetmemeBot",
17. "Butterfly","Twitturls","Me.dium","Twiceler");
19. foreach($botlist as $bot)
20. {
21. if(strpos($_SERVER['HTTP_USER_AGENT'],$bot)!==false)
22. return true; // Is a bot
23. }
25. return false; // Not a bot
26. }
27. ?>

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