搬运-蜘蛛php测试代码

可以通过php的gethostbyname功能

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function testbotip($ip,$agent) {
        $hostname gethostbyaddr($ip);
        if ($hostname==$ipreturn false;
        $rip gethostbyname($hostname); // we use long version because there could be multiple A records.
        print "Ip:$ip\tHostname: $hostname = $agent\t\t";
        if ($ip==$rip) {
                //host is not faked so now let's see if it is who it says it is via agent
                if(preg_match("/bing|msnbot/I",$agent)&&(preg_match("/msn\.com/I",$hostname))) return true;
                if(preg_match("/Google/I",$agent)&&(preg_match("/Google\.com/I",$hostname))) return true;
                if(preg_match("/yahoo/I",$agent)&&(preg_match("/yahoo\.com/I",$hostname))) return true;
                if(preg_match("/twittervir/I",$agent)&&(preg_match("/twttr\.com/I",$hostname))) return true;
                //ok done standard ones we know ... now we need to try generic test.
                //good bots will give a domain where they can be looked up.  This should match their reverse ip domain.
                preg_match("/([\w]+\.[\w]+)($|\.uk$)/",strtolower($hostname),$matches);
                $dom1 $matches[0];
                if (!(strpos($agent$dom1) !== false)) {
                        //echo "$dom1 NOT FOUND !!\n";
                        return false;
                }
                return true;
        }
        return false;
}

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