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<?php

/**
 * CrawlerDetect is a PHP class for detecting bots/crawlers/spiders via the user agent. 
 * 
 * @link: https://github.com/JayBizzle/Crawler-Detect
 * 
 */
/*
  The MIT License (MIT)

Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  SOFTWARE.
 */

namespace Jaybizzle\CrawlerDetect;

class CrawlerDetect {

protected $userAgent = null;
    protected $httpHeaders = array();
    protected $matches = array();
    protected static $crawlers = array(
        '007ac9 Crawler',
        '008\\/',
        '360Spider',
        'A6-Indexer',
        'ABACHOBot',
        'AbiLogicBot',
        'Aboundex',
        'Accoona-AI-Agent',
        'acoon',
        'AddSugarSpiderBot',
        'AddThis',
        'Adidxbot',
        'ADmantX',
        'AdvBot',
        'ahrefsbot',
        'aihitbot',
        'Airmail',
        'AISearchBot',
        'Anemone',
        'antibot',
        'AnyApexBot',
        'Applebot',
        'arabot',
        'Arachmo',
        'archive-com',
        'archive.org_bot',
        'B-l-i-t-z-B-O-T',
        'backlinkcrawler',
        'baiduspider',
        'BecomeBot',
        'BeslistBot',
        'bibnum\.bnf',
        'biglotron',
        'BillyBobBot',
        'Bimbot',
        'bingbot',
        'binlar',
        'blekkobot',
        'blexbot',
        'BlitzBOT',
        'bl\.uk_lddc_bot',
        'bnf\.fr_bot',
        'boitho\.com-dc',
        'boitho\.com-robot',
        'brainobot',
        'btbot',
        'BUbiNG',
        'Butterfly\/',
        'buzzbot',
        'careerbot',
        'CatchBot',
        'CC Metadata Scaper',
        'ccbot',
        'Cerberian Drtrs',
        'changedetection',
        'Charlotte',
        'CloudFlare-AlwaysOnline',
        'citeseerxbot',
        'coccoc',
        'classbot',
        'Commons-HttpClient',
        'content crawler spider',
        'Content Crawler',
        'convera',
        'ConveraCrawler',
        'CoPubbot',
        'cosmos',
        'Covario-IDS',
        'CrawlBot',
        'crawler4j',
        'CrystalSemanticsBot',
        'curl',
        'cXensebot',
        'CyberPatrol',
        'DataparkSearch',
        'dataprovider',
        'DiamondBot',
        'Digg',
        'discobot',
        'DomainAppender',
        'domaincrawler',
        'Domain Re-Animator Bot',
        'dotbot',
        'drupact',
        'DuckDuckBot',
        'EARTHCOM',
        'EasouSpider',
        'ec2linkfinder',
        'edisterbot',
        'ElectricMonk',
        'elisabot',
        'emailmarketingrobot',
        'EmeraldShield\.com WebBot',
        'envolk\[ITS\]spider',
        'EsperanzaBot',
        'europarchive\.org',
        'exabot',
        'ezooms',
        'facebookexternalhit',
        'Facebot',
        'FAST Enteprise Crawler',
        'FAST Enterprise Crawler',
        'FAST-WebCrawler',
        'FDSE robot',
        'Feedfetcher-Google',
        'FindLinks',
        'findlink',
        'findthatfile',
        'findxbot',
        'Flamingo_SearchEngine',
        'fluffy',
        'fr-crawler',
        'FRCrawler',
        'FurlBot',
        'FyberSpider',
        'g00g1e\.net',
        'GigablastOpenSource',
        'grub-client',
        'g2crawler',
        'Gaisbot',
        'GalaxyBot',
        'genieBot',
        'Genieo',
        'GermCrawler',
        'gigabot',
        'GingerCrawler',
        'Girafabot',
        'Gluten Free Crawler',
        'gnam gnam spider',
        'Googlebot-Image',
        'Googlebot-Mobile',
        'Googlebot',
        'GrapeshotCrawler',
        'gslfbot',
        'GurujiBot',
        'HappyFunBot',
        'Healthbot',
        'heritrix',
        'hl_ftien_spider',
        'Holmes',
        'htdig',
        'httpunit',
        'httrack',
        'ia_archiver',
        'iaskspider',
        'iCCrawler',
        'ichiro',
        'igdeSpyder',
        'iisbot',
        'InAGist',
        'InfoWizards Reciprocal Link System PRO',
        'Insitesbot',
        'integromedb',
        'intelium_bot',
        'InterfaxScanBot',
        'IODC',
        'IOI',
        'ip-web-crawler\.com',
        'ips-agent',
        'IRLbot',
        'IssueCrawler',
        'IstellaBot',
        'it2media-domain-crawler',
        'iZSearch',
        'Jaxified Bot',
        'JOC Web Spider',
        'jyxobot',
        'KoepaBot',
        'L\.webis',
        'LapozzBot',
        'Larbin',
        'lb-spider',
        'LDSpider',
        'LexxeBot',
        'libwww',
        'Linguee Bot',
        'Link Valet',
        'linkdex',
        'LinkExaminer',
        'LinksManager\.com_bot',
        'LinkpadBot',
        'LinksCrawler',
        'LinkWalker',
        'Lipperhey Link Explorer',
        'Lipperhey SEO Service',
        'Livelapbot',
        'lmspider',
        'lssbot',
        'lssrocketcrawler',
        'ltx71',
        'lufsbot',
        'lwp-trivial',
        'Mail\.RU_Bot',
        'MegaIndex\.ru',
        'mabontland',
        'magpie-crawler',
        'Mediapartners-Google',
        'memorybot',
        'MetaURI',
        'MJ12bot',
        'mlbot',
        'Mnogosearch',
        'mogimogi',
        'MojeekBot',
        'Moreoverbot',
        'Morning Paper',
        'Mrcgiguy',
        'MSIECrawler',
        'msnbot',
        'msrbot',
        'MVAClient',
        'mxbot',
        'NerdByNature\.Bot',
        'NerdyBot',
        'netEstate NE Crawler',
        'netresearchserver',
        'NetSeer Crawler',
        'NewsGator',
        'NextGenSearchBot',
        'NG-Search',
        'ngbot',
        'nicebot',
        'niki-bot',
        'Notifixious',
        'noxtrumbot',
        'Nusearch Spider',
        'nutch',
        'NutchCVS',
        'Nymesis',
        'obot',
        'oegp',
        'ocrawler',
        'omgilibot',
        'OmniExplorer_Bot',
        'online link validator',
        'Online Website Link Checker',
        'OOZBOT',
        'openindexspider',
        'OpenWebSpider',
        'OrangeBot',
        'Orbiter',
        'ow\.ly',
        'PaperLiBot',
        'Pingdom\.com_bot',
        'Ploetz \+ Zeller',
        'page2rss',
        'PageBitesHyperBot',
        'panscient',
        'Peew',
        'PercolateCrawler',
        'phpcrawl',
        'Pizilla',
        'Plukkie',
        'polybot',
        'Pompos',
        'PostPost',
        'postrank',
        'proximic',
        'psbot',
        'purebot',
        'PycURL',
        'python-requests',
        'Python-urllib',
        'Qseero',
        'QuerySeekerSpider',
        'Qwantify',
        'Radian6',
        'RAMPyBot',
        'REL Link Checker',
        'RetrevoPageAnalyzer',
        'Riddler',
        'Robosourcer',
        'rogerbot',
        'RufusBot',
        'SandCrawler',
        'SBIder',
        'ScoutJet',
        'Scrapy',
        'ScreenerBot',
        'scribdbot',
        'Scrubby',
        'SearchmetricsBot',
        'SearchSight',
        'seekbot',
        'semanticdiscovery',
        'SemrushBot',
        'Sensis Web Crawler',
        'SEOChat::Bot',
        'seokicks-robot',
        'SEOstats',
        'Seznam screenshot-generator',
        'seznambot',
        'Shim-Crawler',
        'ShopWiki',
        'Shoula robot',
        'ShowyouBot',
        'SimpleCrawler',
        'sistrix crawler',
        'SiteBar',
        'sitebot',
        'siteexplorer\.info',
        'SklikBot',
        'slider\.com',
        'slurp',
        'smtbot',
        'Snappy',
        'sogou spider',
        'sogou',
        'Sosospider',
        'spbot',
        'Speedy Spider',
        'speedy',
        'SpiderMan',
        'Sqworm',
        'SSL-Crawler',
        'StackRambler',
        'suggybot',
        'summify',
        'SurdotlyBot',
        'SurveyBot',
        'SynooBot',
        'tagoobot',
        'teoma',
        'TerrawizBot',
        'TheSuBot',
        'Thumbnail\.CZ robot',
        'TinEye',
        'toplistbot',
        'trendictionbot',
        'TrueBot',
        'truwoGPS',
        'turnitinbot',
        'TweetedTimes Bot',
        'TweetmemeBot',
        'twengabot',
        'Twitterbot',
        'uMBot',
        'UnisterBot',
        'UnwindFetchor',
        'updated',
        'urlappendbot',
        'Urlfilebot',
        'urlresolver',
        'UsineNouvelleCrawler',
        'Vagabondo',
        'Vivante Link Checker',
        'voilabot',
        'Vortex',
        'voyager\\/',
        'VYU2',
        'web-archive-net\.com\.bot',
        'Websquash\.com',
        'WeSEE:Ads\/PageBot',
        'wbsearchbot',
        'webcollage',
        'webcompanycrawler',
        'webcrawler',
        'webmon ',
        'WeSEE:Search',
        'wf84',
        'wget',
        'wocbot',
        'WoFindeIch Robot',
        'WomlpeFactory',
        'woriobot',
        'wotbox',
        'Xaldon_WebSpider',
        'Xenu Link Sleuth',
        'xintellibot',
        'XML Sitemaps Generator',
        'XoviBot',
        'Y!J-ASR',
        'yacy',
        'yacybot',
        'Yahoo Link Preview',
        'Yahoo! Slurp China',
        'Yahoo! Slurp',
        'YahooSeeker',
        'YahooSeeker-Testing',
        'YandexBot',
        'YandexImages',
        'YandexMetrika',
        'yandex',
        'yanga',
        'Yasaklibot',
        'yeti',
        'YioopBot',
        'YisouSpider',
        'YodaoBot',
        'yoogliFetchAgent',
        'yoozBot',
        'YoudaoBot',
        'Zao',
        'Zealbot',
        'zspider',
        'ZyBorg',
        '[a-z0-9\\-_]*((?<!cu)bot|crawler|archiver|transcoder|spider)',
    );

/**
     * All possible HTTP headers that represent the
     * User-Agent string.
     *
     * @var array
     */
    protected static $uaHttpHeaders = array(
        // The default User-Agent string.
        'HTTP_USER_AGENT',
        // Header can occur on devices using Opera Mini.
        'HTTP_X_OPERAMINI_PHONE_UA',
        // Vodafone specific header: http://www.seoprinciple.com/mobile-web-community-still-angry-at-vodafone/24/
        'HTTP_X_DEVICE_USER_AGENT',
        'HTTP_X_ORIGINAL_USER_AGENT',
        'HTTP_X_SKYFIRE_PHONE',
        'HTTP_X_BOLT_PHONE_UA',
        'HTTP_DEVICE_STOCK_UA',
        'HTTP_X_UCBROWSER_DEVICE_UA',
    );

/**
     * Class constructor.
     */
    public function __construct(array $headers = null, $userAgent = null)
    {
        $this->setHttpHeaders($headers);
        $this->setUserAgent($userAgent);
    }

public function setHttpHeaders($httpHeaders = null)
    {
        // use global _SERVER if $httpHeaders aren't defined
        if (!is_array($httpHeaders) || !count($httpHeaders))
        {
            $httpHeaders = $_SERVER;
        }
        // clear existing headers
        $this->httpHeaders = array();
        // Only save HTTP headers. In PHP land, that means only _SERVER vars that
        // start with HTTP_.
        foreach ($httpHeaders as $key => $value)
        {
            if (substr($key, 0, 5) === 'HTTP_')
            {
                $this->httpHeaders[$key] = $value;
            }
        }
    }

public function getUaHttpHeaders()
    {
        return self::$uaHttpHeaders;
    }

public function setUserAgent($userAgent = null)
    {
        if (false === empty($userAgent))
        {
            return $this->userAgent = $userAgent;
        } else
        {
            $this->userAgent = null;
            foreach ($this->getUaHttpHeaders() as $altHeader)
            {
                if (false === empty($this->httpHeaders[$altHeader]))
                { // @todo: should use getHttpHeader(), but it would be slow. (Serban)
                    $this->userAgent .= $this->httpHeaders[$altHeader] . ' ';
                }
            }

return $this->userAgent = (!empty($this->userAgent) ? trim($this->userAgent) : null);
        }
    }

public function getRegex()
    {
        return '(' . implode('|', self::$crawlers) . ')';
    }

public function isCrawler($userAgent = null)
    {
        $agent = is_null($userAgent) ? $this->userAgent : $userAgent;

$result = preg_match('/' . $this->getRegex() . '/i', $agent, $matches);

if ($matches)
        {
            $this->matches = $matches;
        }

return (bool) $result;
    }

public function getMatches()
    {
        return $this->matches[0];
    }

}

[+] ..
[-] index.php [edit]
[-] CVarDumper.php [edit]
[-] CrawlerDetect.php [edit]