PHP判断来访是搜索引擎蜘蛛还是普通用户的代码小结


            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





<?php

function checkrobot($useragent=''){

	static $kw_spiders = array('bot', 'crawl', 'spider' ,'slurp', 'sohu-search', 'lycos', 'robozilla');

	static $kw_browsers = array('msie', 'netscape', 'opera', 'konqueror', 'mozilla');



	$useragent = strtolower(empty($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





<?php

if(!checkrobot()){

//do something

}

?>





2、第二种方法：

使用PHP实现蜘蛛访问日志统计







$useragent = addslashes(strtolower($_SERVER['HTTP_USER_AGENT']));



 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($useragent,'ia_archiver') !== false){$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。





function is_crawler() { 

  $userAgent = strtolower($_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 ($spiders as $spider) { 

    $spider = strtolower($spider); 

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

      return true; 

    } 

  } 

  return false; 

}



下面的php代码附带了更多的蜘蛛标识





function isCrawler() { 

    echo $agent= strtolower($_SERVER['HTTP_USER_AGENT']); 

    if (!empty($agent)) { 

        $spiderSite= array( 

            "TencentTraveler", 

            "Baiduspider+", 

            "BaiduGame", 

            "Googlebot", 

            "msnbot", 

            "Sosospider+", 

            "Sogou web spider", 

            "ia_archiver", 

            "Yahoo! Slurp", 

            "YoudaoBot", 

            "Yahoo Slurp", 

            "MSNBot", 

            "Java (Often spam bot)", 

            "BaiDuSpider", 

            "Voila", 

            "Yandex bot", 

            "BSpider", 

            "twiceler", 

            "Sogou Spider", 

            "Speedy Spider", 

            "Google AdSense", 

            "Heritrix", 

            "Python-urllib", 

            "Alexa (IA Archiver)", 

            "Ask", 

            "Exabot", 

            "Custo", 

            "OutfoxBot/YodaoBot", 

            "yacy", 

            "SurveyBot", 

            "legs", 

            "lwp-trivial", 

            "Nutch", 

            "StackRambler", 

            "The web archive (IA Archiver)", 

            "Perl tool", 

            "MJ12bot", 

            "Netcraft", 

            "MSIECrawler", 

            "WGet tools", 

            "larbin", 

            "Fish search", 

        ); 

        foreach($spiderSite as $val) { 

            $str = strtolower($val); 

            if (strpos($agent, $str) !== false) { 

                return true; 

            } 

        } 

    } else { 

        return false; 

    } 

} 

if (isCrawler()){ 

    echo "你好蜘蛛精！"; 

} 

else{ 

   echo "你不是蜘蛛精啊！"; 

} 



第四种方法：





<?php

$flag = false;

$tmp = $_SERVER['HTTP_USER_AGENT'];

if(strpos($tmp, 'Googlebot') !== false){

  $flag = true;

} else if(strpos($tmp, 'Baiduspider') >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.zwyuanma.com" . $_SERVER['REQUEST_URI']);

  // 自动转到//www.zwyuanma.com 对应的网页

  // $_SERVER['REQUEST_URI'] 为域名后面的路径

  // 或换成header("Location: //www.zwyuanma.com/abc/d.php");

  exit();

}

?>