$userAgent=strtolower($_SERVER['HTTP_USER_AGENT']);

$spiders=array(

‘Googlebot',//Google爬虫

‘Baiduspider',//百度爬虫

‘Yahoo!Slurp',//雅虎爬虫

‘YodaoBot',//有道爬虫

‘msnbot'//Bing爬虫

//更多爬虫关键字

);

foreach($spidersas$spider){

$spider=strtolower($spider);

if(strpos($userAgent,$spider)!==false){

returntrue;

}

}

returnfalse;

}