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PHP判断来访是搜索引擎蜘蛛还是普通用户的代码小结

　　本文标签：PHP,判断,搜索引擎,蜘蛛

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: http://www.jb51.net" . $_SERVER[REQUEST_URI]);
  // 自动转到http://www.jb51.net 对应的网页
  // $_SERVER[REQUEST_URI] 为域名后面的路径
  // 或换成header("Location: http://www.jb51.net/abc/d.php");
  exit();
}
?>