Detectar Bots y Web Spiders de los navegadores que nos visitan

Prácticamente la totalidad de los sitios web implementan su registro de visitas en una base de datos. Después de un tiempo se comienzan a acumular datos, que posteriormente se hace evidente que algunos de esos datos son basura debido a las arañas y los robots que están verificando el sitio. Este tipo de robots utilizan lineas de navegador únicas (HTTP_USER_AGENT), lo que hace que sean fáciles de identificar.

Con esta simple función, evitamos que nos contabilice como visita en nuestro registro.

function is_bot(){
 
    $bots = array(
        'Googlebot', 'Baiduspider', 'ia_archiver',
        'R6_FeedFetcher', 'NetcraftSurveyAgent', 'Sogou web spider',
        'bingbot', 'Yahoo! Slurp', 'facebookexternalhit', 'PrintfulBot',
        'msnbot', 'Twitterbot', 'UnwindFetchor',
        'urlresolver', 'Butterfly', 'TweetmemeBot' );
 
 
    foreach($bots as $b){
 
        if( stripos( $_SERVER['HTTP_USER_AGENT'], $b ) !== false ) return true;
 
    }
 
 
 
    return false;
 
}

function is_bot(){

$bots = array(

'Googlebot', 'Baiduspider', 'ia_archiver',

'R6_FeedFetcher', 'NetcraftSurveyAgent', 'Sogou web spider',

'bingbot', 'Yahoo! Slurp', 'facebookexternalhit', 'PrintfulBot',

'msnbot', 'Twitterbot', 'UnwindFetchor',

'urlresolver', 'Butterfly', 'TweetmemeBot' );

foreach($bots as $b){

if( stripos( $_SERVER['HTTP_USER_AGENT'], $b ) !== false ) return true;

}

return false;

}

Motores de búsqueda, arañas y rastreadores (los mas conocidos).

Baiduspider+(+http://www.baidu.com/search/spider.htm)
Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)
Moreoverbot/5.1 (+http://w.moreover.com; webmaster@moreover.com) Mozilla/5.0
UnwindFetchor/1.0 (+http://www.gnip.com/)
Voyager/1.0
PostRank/2.0 (postrank.com)
R6_FeedFetcher(www.radian6.com/crawler)
R6_CommentReader(www.radian6.com/crawler)
radian6_default_(www.radian6.com/crawler)
Mozilla/5.0 (compatible; Ezooms/1.0; ezooms.bot@gmail.com)
ia_archiver (+http://www.alexa.com/site/help/webmasters; crawler@alexa.com)
Mozilla/5.0 (compatible; Yahoo! Slurp; http://help.yahoo.com/help/us/ysearch/slurp)
Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
Mozilla/5.0 (en-us) AppleWebKit/525.13 (KHTML, like Gecko; Google Web Preview) Version/3.1 Safari/525.13
Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots)
Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)
Twitterbot/0.1
LinkedInBot/1.0 (compatible; Mozilla/5.0; Jakarta Commons-HttpClient/3.1 +http://www.linkedin.com)
bitlybot
MetaURI API/2.0 +metauri.com
Mozilla/5.0 (compatible; Birubot/1.0) Gecko/2009032608 Firefox/3.0.8
Mozilla/5.0 (compatible; PrintfulBot/1.0; +http://printful.com/bot.html)
Mozilla/5.0 (compatible; PaperLiBot/2.1)
Summify (Summify/1.0.1; +http://summify.com)
Mozilla/5.0 (compatible; TweetedTimes Bot/1.0; +http://tweetedtimes.com)
PycURL/7.18.2
facebookexternalhit/1.1 (+http://www.facebook.com/externalhit_uatext.php)
Python-urllib/2.6
Python-httplib2/$Rev$
AppEngine-Google; (+http://code.google.com/appengine; appid: lookingglass-server)
Wget/1.9+cvs-stable (Red Hat modified)
Mozilla/5.0 (compatible; redditbot/1.0; +http://www.reddit.com/feedback)
Mozilla/5.0 (compatible; MSIE 6.0b; Windows NT 5.0) Gecko/2009011913 Firefox/3.0.6 TweetmemeBot
Mozilla/5.0 (compatible; discobot/1.1; +http://discoveryengine.com/discobot.html)
Mozilla/5.0 (compatible; Exabot/3.0; +http://www.exabot.com/go/robot)
Mozilla/5.0 (compatible; SiteBot/0.1; +http://www.sitebot.org/robot/)
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1 + FairShare-http://fairshare.cc)
HTTP_Request2/2.0.0beta3 (http://pear.php.net/package/http_request2) PHP/5.3.2
Mozilla/5.0 (compatible; Embedly/0.2; +http://support.embed.ly/)
magpie-crawler/1.1 (U; Linux amd64; en-GB; +http://www.brandwatch.net)
(TalkTalk Virus Alerts Scanning Engine)
Sogou web spider/4.0(+http://www.sogou.com/docs/help/webmasters.htm#07)
Googlebot/2.1 )
msnbot-NewsBlogs/2.0b (+http://search.msn.com/msnbot.htm)
msnbot/2.0b (+http://search.msn.com/msnbot.htm)
msnbot-media/1.1 (+http://search.msn.com/msnbot.htm)
Mozilla/5.0 (compatible; oBot/2.3.1; +http://www-935.ibm.com/services/us/index.wss/detail/iss/a1029077?cntxt=a1027244)
Sosospider+(+http://help.soso.com/webspider.htm)
COMODOspider/Nutch-1.0
trunk.ly spider contact@trunk.ly
Mozilla/5.0 (compatible; Purebot/1.1; +http://www.puritysearch.net/)
Mozilla/5.0 (compatible; MJ12bot/v1.4.0; http://www.majestic12.co.uk/bot.php?+)
knowaboutBot 0.01
Showyoubot )
Flamingo_SearchEngine (+http://www.flamingosearch.com/bot)
MLBot (www.metadatalabs.com/mlbot)
my-robot/0.1
Mozilla/5.0 (compatible; woriobot support at worio dot com +http://worio.com)
Mozilla/5.0 (compatible; YoudaoBot/1.0; ; )
chilitweets.com
Mozilla/5.0 (TweetBeagle;
OctoBot/2.1 (OctoBot/2.1.0; +http://www.octofinder.com/octobot.html?2.1)
Mozilla/5.0 (compatible; FriendFeedBot/0.1; +Http://friendfeed.com/about/bot)
Mozilla/5.0 (compatible; WASALive Bot ; https://udger.com/resources/ua-list/bot-detail?bot=WASALive-Bot
Mozilla/5.0 (compatible; Apercite; +http://www.apercite.fr/robot/index.html)
urlfan-bot/1.0; +http://www.urlfan.com/site/bot/350.html
SeznamBot/3.0 (+http://fulltext.sblog.cz/)
Yeti/1.0 (NHN Corp.;
Mozilla/5.0 (Windows; U; Windows NT 6.0; en-GB; rv:1.0; trendictionbot0.4.2; trendiction media ssppiiddeerr; http://www.trendiction.com/bot/; please let us know of any problems; ssppiiddeerr at trendiction.com) Gecko/20071127 Firefox/2.0.0.11
yacybot (freeworld/global; amd64 Linux 2.6.35-24-generic; java 1.6.0_20; Asia/en) http://yacy.net/bot.html
Mozilla/5.0 (compatible; suggybot v0.01a,
ssearch_bot (sSearch Crawler; http://www.semantissimo.de)
Mozilla/5.0 (compatible; Linux; Socialradarbot/2.0; en-US; crawler@infegy.com)
wikiwix-bot-3.0
Mozilla/5.0 (compatible; AhrefsBot/1.0; +http://ahrefs.com/robot/)
Mozilla/5.0 (compatible; DotBot/1.1; , crawler@dotnetdotcom.org)
GarlikCrawler/1.1 (http://garlik.com/, crawler@garik.com)
Mozilla/5.0 (compatible; SISTRIX Crawler; http://crawler.sistrix.net/)
Mozilla/5.0 (compatible; 008/0.83; Gecko/2008032620
PostPost/1.0 (+http://postpo.st/crawlers)
Aghaven/Nutch-1.2 (www.aghaven.com)
SBIder/Nutch-1.0-dev (http://www.sitesell.com/sbider.html)
Mozilla/5.0 (compatible; ScoutJet; +http://www.scoutjet.com/)
Soup/2011-05-11Z11-51-38–soup–production-2-g251c1f9d/251c1f9d6cdff8491e0b49f4ba3288ec7f3de903 (http://soup.io/)
Trapit/1.1
Jakarta Commons-HttpClient/3.1
Readability/0.1
kame-rt (support@backtype.com)
Mozilla/5.0 (compatible; Topix.net;
Megite2.0 https://techcrunch.com/tag/megite/)
SkyGrid/1.0 (+http://skygrid.com/partners)
Netvibes (http://www.netvibes.com)
Zemanta Aggregator/0.7 +http://www.zemanta.com
Owlin.com/1.3 (http://owlin.com/)
Mozilla/5.0 (compatible; Twitturls; +http://twitturls.com)
Tumblr/1.0 RSS syndication (+http://www.tumblr.com/) (support@tumblr.com)
Mozilla/4.0 (compatible; www.euro-directory.com; urlchecker1.0)
Covario-IDS/1.0 (Covario; ; support at covario dot com)

Fuente: http://www.phacks.net