PHP判断来访是搜索引擎蜘蛛还是普通用户的代码小结

这篇文章主要介绍了PHP判断来访是搜索引擎蜘蛛还是普通用户的代码小结，多种方法总有一种适合你，防止搜索引擎蜘蛛拖死搜索引擎

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

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

$useragent = addslashes(strtolower($_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：

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