isRobot

function isRobot($agent)
{
	$robots = array(
		"bot",
		"abcdatos",
		"acme",
		"ahoy",
		"alkaline",
		"almaden",
		"amfibibot",
		"ananzi",
		"answerbus",
		"anthill",
		"appie",
		"appie1.1",
		"arachnophilia",
		"arale",
		"araneo",
		"araybot",
		"architext",
		"architextspider",
		"aretha",
		"argus",
		"ariadne",
		"arks",
		"ask jeeves",
		"aspider",
		"aspseek",
		"asterias2.0",
		"atomz",
		"augurfind",
		"ai_archiver",
		"auresys",
		"avantgo",
		"backrub",
		"baiduspider",
		"bannana_bot",
		"bbot",
		"bdcindexer",
		"bdfetch",
		"becomebot",
		"big brother",
		"bjaaland",
		"blackwidow",
		"bloodhound",
		"boitho",
		"bordermanager",
		"borg-bot",
		"botlink",
		"boxseabot",
		"bruinbot",
		"bspider",
		"cactvs chemistry spider",
		"cassandra",
		"checkbot",
		"christcrawler",
		"churl",
		"cienciaficcion.net",
		"clushbot",
		"collective",
		"computingsite robi/1.0",
		"confuzzledbot",
		"converacrawler",
		"coolbot",
		"crawler",
		"crawler@fast",
		"cyberspyder",
		"cydralspider",
		"docomo",
		"dienstspider",
		"digger",
		"digimarc marcspider",
		"digimarc marcspider/cgi",
		"digital integrity robot",
		"direct hit grabber",
		"dnabot",
		"dragonbot",
		"dumbot",
		"ecollector",
		"eit link verifier robot",
		"elfinbot",
		"emailsiphon",
		"esculapio",
		"exabot",
		"e-societyrobot",
		"fast enterprise crawler",
		"fastbug",
		"fastcrawler",
		"fast-webcrawler",
		"fetchrover",
		"filangy",
		"findlinks",
		"fish search",
		"fluffy the spider",
		"fluid dynamics search engine robot",
		"focusedcrawler",
		"fouineur",
		"freecrawl",
		"frooglebot",
		"funnelweb",
		"fusionbot",
		"fyberspider",
		"gaisbot",
		"gammaspider",
		"gcreep",
		"geobot",
		"geonabot",
		"getbot",
		"getterroboplus",
		"gigabot",
		"girafabot",
		"goldfire server",
		"golembot",
		"googlebot",
		"grapnel/0.01 experiment",
		"griffon",
		"gromit",
		"grub-client",
		"gulliver",
		"gulperbot",
		"hambot",
		"harvest",
		"henrythemiragorobot",
		"htmlgobble",
		"httpget",
		"httrack",
		"hyper-decontextualizer",
		"ia_archiver",
		"iajabot",
		"ibm_planetwide",
		"ichiro",
		"iconsurf",
		"iltrovatore-setaccio",
		"imagelock",
		"incywincy",
		"inelabot",
		"informant",
		"infoseek",
		"infoseek robot 1.0",
		"infoseek sidewinder",
		"infoseek sidewinder 2.0b",
		"infospiders",
		"ingridbot",
		"inktomi slurp",
		"inktomisearch",
		"inspectorbot",
		"intelliagentbot",
		"internet cruiser robot",
		"internet shinchakubin",
		"internetlinkagent",
		"irlbot",
		"irobot",
		"iron33",
		"israeli-search",
		"istarthere",
		"javabee",
		"jbot java web robot",
		"jcrawler",
		"jobo",
		"jobot",
		"joebot",
		"jubii indexing robot",
		"jumpstation",
		"jetbot",
		"katipo",
		"kilroy",
		"kit-fireball",
		"knowledge",
		"ko_yappo_robot",
		"labelgrabber",
		"lachesis",
		"larbin",
		"libwww-mget",
		"libwww-perl",
		"limebot",
		"link validator",
		"linklint-checkonly",
		"linknzbot",
		"linkscan",
		"linkwalker",
		"lnspiderguy",
		"lockon",
		"lycos_spider",
		"magpie",
		"mantraagent",
		"mattiebot",
		"mediafox",
		"mediapartners",
		"mercator",
		"merzscope",
		"mindcrawler",
		"mnogosearch",
		"moget",
		"moget/1.0",
		"momspider",
		"monsterbot",
		"msiecrawler",
		"msnbot",
		"msproxy",
		"muncher bot",
		"muninn",
		"muscatferret",
		"mysterybot",
		"nationaldirectory",
		"naverbot",
		"naverbot_dloader",
		"naverrobot",
		"ndspider",
		"nec-meshexplorer",
		"nederland.zoek",
		"netcarta webmap engine",
		"netmechanic",
		"netnosecrawler",
		"netresearchserver",
		"netscoop",
		"newscan-online",
		"nextgensearchbot",
		"northstar robot",
		"npbot",
		"nusearch spider",
		"nutchbot",
		"nwi robot",
		"nzexplorer",
		"ncsa beta",
		"ng/1.0",
		"objectssearch",
		"obot",
		"occam",
		"ocelli",
		"omniexplorer_bot",
		"ontospider",
		"openbot",
		"openfind data gatherer",
		"orb search",
		"osis-project",
		"pack rat",
		"pageboy",
		"panscient",
		"parasite",
		"patric",
		"patwebbot",
		"peerbot",
		"pegasus",
		"peregrinator",
		"perlcrawler 1.0",
		"phantom",
		"phpdig",
		"piltdownman",
		"pimptrain.com's robot",
		"pipeliner",
		"plumtreewebaccessor",
		"polybot",
		"pompos",
		"poodle predictor 1.0",
		"poppi",
		"popular iconoclast",
		"portal juice spider",
		"portal manager",
		"portalb spider",
		"psbot",
		"python robot",
		"quepasacreep",
		"raven search",
		"rbse spider",
		"resume robot",
		"rixbot",
		"road runner",
		"roadhouse crawling system",
		"robbie the robot",
		"robocrawl spider",
		"robofox",
		"robopal",
		"robot",
		"robot francoroute",
		"robozilla",
		"roverbot",
		"rpt-httpclient",
		"safaribookmarkchecker",
		"safetynet robot",
		"scooter",
		"scrubby",
		"search agent",
		"search.aus-au.com",
		"searchprocess",
		"seekbot",
		"senrigan",
		"sensis.au web crawler",
		"seventwentyfour",
		"sg-scout",
		"shagseeker",
		"shai'hulud",
		"shopwiki",
		"sidewinder",
		"sift",
		"simmany robot ver1.0",
		"sitetech-rover",
		"skymob.com",
		"slcrawler",
		"sleek",
		"sleek spider",
		"slurp",
		"slurp/si",
		"[email protected]",
		"smart spider",
		"snooper",
		"sohu-search",
		"suchtop-bot",
		"solbot",
		"speedy spider",
		"speedyspider",
		"spider",
		"spider_monkey",
		"spiderbot",
		"spiderline crawler",
		"spiderman",
		"spiderview(tm)",
		"spry wizard robot",
		"spurlbot",
		"sqworm",
		"steeler/1.3",
		"suke",
		"suntek search engine",
		"sven",
		"sygol",
		"szukacz",
		"tach black widow",
		"tarantula",
		"tarspider",
		"techbot",
		"templeton",
		"teoma",
		"thesubot",
		"thumbshots-de-bot",
		"t-h-u-n-d-e-r-s-t-o-n-e",
		"titin",
		"tlspider",
		"tulipchain",
		"turnitinbot",
		"tutorgigbot",
		"tutorial crawler",
		"teomaagent",
		"ucsd crawl",
		"udmsearch",
		"ultraseek",
		"unchaos_crawler",
		"uptimebot",
		"usyd-nlp-spider",
		"vagabondo",
		"valkyrie",
		"verticrawl",
		"vision-search",
		"void-bot",
		"voilabot",
		"voyager",
		"vspider",
		"vwbot",
		"walhello appie",
		"wallpaper",
		"webbandit web spider",
		"webcatcher",
		"webcopy",
		"webcore / roots",
		"webfetcher",
		"webfoot robot",
		"webinator",
		"webinator-indexer",
		"weblayers",
		"weblinker",
		"webmirror",
		"webmoose",
		"webquest",
		"webrace",
		"webreaper",
		"websauger",
		"websearch",
		"websnarf",
		"webspider",
		"webstolperer",
		"webvac",
		"webwalk",
		"webwalker",
		"webwatch",
		"webwombat",
		"webwombat",
		"webyield robot",
		"webzinger",
		"whatuseek",
		"whowhere robot",
		"wildferret",
		"worio",
		"wisenut",
		"webcrawler",
		"xenu link sleuth",
		"xenu link sleuth 1.2d",
		"xenu link sleuth 1.2e",
		"xget",
		"xyleme robot",
		"yahoo! slurp",
		"yahoo-mmcrawler",
		"yottacars_bot",
		"yahooseeker",
		"zao/0",
		"zao-crawler",
		"zipppbot",
		"zoomspider",
		"zyborg",
		"zyborg/1.0",
	);

	$agent = strtolower($agent);
	foreach ($robots as $bot) {
		if (strpos($agent, strtolower($bot)) !== FALSE) {
			return TRUE;
		}
	}

	return FALSE;
}