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

<?phpfunction 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

<?phpif(!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")."	".$_SERVER["REMOTE_ADDR"]."	".$bot."	"."http://".$_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"]."");   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.rzxsoft.cn" . $_SERVER["REQUEST_URI"]);  // 自动转到//www.rzxsoft.cn 对应的网页  // $_SERVER["REQUEST_URI"] 为域名后面的路径  // 或换成header("Location: //www.rzxsoft.cn/abc/d.php");  exit();}?>