1、推荐的一种方法：php判断搜索引擎蜘蛛爬虫还是人为访问代码,摘自Discuz x3.2
$useragent = strtolower(empty($useragent) ? $_SERVER['HTTP_USER_AGENT'] : $useragent);
if(strpos($useragent,'http://') === false && dstrpos($useragent,$kw_browsers)) return false;
if(dstrpos($useragent,$kw_spiders)) return true;
return false;
}
function dstrpos($string,$arr,$returnvalue = false) {
if(empty($string)) return false;
foreach((array)$arr as $v) {
if(strpos($string,$v) !== false) {
$return = $returnvalue ? $v : true;
return $return;
}
}
return false;
}
if(checkrobot()){
echo '机器人爬虫';
}else{
echo '人';
}
?>
实际应用中可以这样判断，直接不是搜索引擎才执行操作
2、第二种方法：
使用PHP实现蜘蛛访问日志统计
if (strpos($useragent,'googlebot')!== false){$bot = 'Google';}
elseif (strpos($useragent,'mediapartners-google') !== false){$bot = 'Google Adsense';}
elseif (strpos($useragent,'baiduspider') !== false){$bot = 'Baidu';}
elseif (strpos($useragent,'sogou spider') !== false){$bot = 'Sogou';}
elseif (strpos($useragent,'sogou web') !== false){$bot = 'Sogou web';}
elseif (strpos($useragent,'sosospider') !== false){$bot = 'SOSO';}
elseif (strpos($useragent,'360spider') !== false){$bot = '360Spider';}
elseif (strpos($useragent,'yahoo') !== false){$bot = 'Yahoo';}
elseif (strpos($useragent,'msn') !== false){$bot = 'MSN';}
elseif (strpos($useragent,'msnbot') !== false){$bot = 'msnbot';}
elseif (strpos($useragent,'sohu') !== false){$bot = 'Sohu';}
elseif (strpos($useragent,'yodaoBot') !== false){$bot = 'Yodao';}
elseif (strpos($useragent,'twiceler') !== false){$bot = 'Twiceler';}
elseif (strpos($useragent,'iaarchiver') !== false){$bot = 'Alexa';}
elseif (strpos($useragent,'iaarchiver') !== false){$bot = 'Alexa';}
elseif (strpos($useragent,'slurp') !== false){$bot = '雅虎';}
elseif (strpos($useragent,'bot') !== false){$bot = '其它蜘蛛';}
if(isset($bot)){
$fp = @fopen('bot.txt','a');
fwrite($fp,date('Y-m-d H:i:s')."\t".$_SERVER["REMOTE_ADDR"]."\t".$bot."\t".'http://'.$_SERVER['SERVER_NAME'].$_SERVER["REQUEST_URI"]."\r\n");
fclose($fp);
}
elseif (strpos($useragent,'mediapartners-google') !== false){$bot = 'Google Adsense';}
elseif (strpos($useragent,'baiduspider') !== false){$bot = 'Baidu';}
elseif (strpos($useragent,'sogou spider') !== false){$bot = 'Sogou';}
elseif (strpos($useragent,'sogou web') !== false){$bot = 'Sogou web';}
elseif (strpos($useragent,'sosospider') !== false){$bot = 'SOSO';}
elseif (strpos($useragent,'360spider') !== false){$bot = '360Spider';}
elseif (strpos($useragent,'yahoo') !== false){$bot = 'Yahoo';}
elseif (strpos($useragent,'msn') !== false){$bot = 'MSN';}
elseif (strpos($useragent,'msnbot') !== false){$bot = 'msnbot';}
elseif (strpos($useragent,'sohu') !== false){$bot = 'Sohu';}
elseif (strpos($useragent,'yodaoBot') !== false){$bot = 'Yodao';}
elseif (strpos($useragent,'twiceler') !== false){$bot = 'Twiceler';}
elseif (strpos($useragent,'iaarchiver') !== false){$bot = 'Alexa';}
elseif (strpos($useragent,'iaarchiver') !== false){$bot = 'Alexa';}
elseif (strpos($useragent,'slurp') !== false){$bot = '雅虎';}
elseif (strpos($useragent,'bot') !== false){$bot = '其它蜘蛛';}
if(isset($bot)){
$fp = @fopen('bot.txt','a');
fwrite($fp,date('Y-m-d H:i:s')."\t".$_SERVER["REMOTE_ADDR"]."\t".$bot."\t".'http://'.$_SERVER['SERVER_NAME'].$_SERVER["REQUEST_URI"]."\r\n");
fclose($fp);
}
第三种方法：
我们可以通过HTTP_USER_AGENT来判断是否是蜘蛛，搜索引擎的蜘蛛都有自己的独特标志，下面列取了一部分。
下面的php代码附带了更多的蜘蛛标识
第四种方法：
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: //www.jb51.cc" . $_SERVER['REQUEST_URI']);
// 自动转到//www.jb51.cc 对应的网页
// $_SERVER['REQUEST_URI'] 为域名后面的路径
// 或换成header("Location: //www.jb51.cc/abc/d.php");
exit();
}
?>
