<?php
class userAgent {
  // userAgent PHP class
  // get user agent and tell us what Browser is accessing
  //
  // function userAgent([$ua_string])
  //   CONSTRUCTOR; reads UA string (or takes the optional given UA string) and gets info from that into our variables.
  //
  // var $uastring
  //   the plain User Agent string
  // var $brand
  //   returns the User Agent brand name
  // var $version
  //   the User Agent version
  // var $bot
  //   bool: true if this agent is a bot
  //
  // function getBrand()
  //   returns the User Agent Brand Name
  // function getVersion()
  //   returns the User Agent version
  //
  // function isbot()
  //   returns true if User Agent seems to be a bot
  // function isns()
  //   returns true if User Agent seems to be Netscape brand, false if not
  // function isns4()
  //   returns true if User Agent seems to be Netscape Communicator 4.x, false if not
  // function isie()
  //   returns true if User Agent seems to be a version of Internet Exploder, false if not
  // function geckobased()
  //   returns true if User Agent seems to be a Gecko-based browser, false if not
  // function geckodate()
  //   returns the Gecko date when it's a Gecko-based browser, 0 if not
  // function khtmlbased()
  //   returns true if User Agent seems to be a KHTML-based browser, false if not

  // collection of some known User Agent Strings:
  // Mozilla/5.0 (compatible; Konqueror/3; Linux 2.4.18; X11; i686)
  // Mozilla/5.0 (X11; U; Linux i686; de-AT; rv:1.3b) Gecko/20030114
  // Mozilla/4.0 (compatible; MSIE 5.0; Windows 95; DigExt)
  // Mozilla/4.0 (compatible; MSIE 6.0; Windows 98; Win 9x 4.90)
  // Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
  // Mozilla/4.75 [de] (Win98; U)
  // Opera/5.12 (Windows 2000; U)  [de]
  // Mozilla/5.0 (Windows; U; Win 9x 4.90; de-DE; m18) Gecko/20010131 Netscape6/6.01
  // Mozilla/5.0 (Windows; U; Windows NT 5.1; de-DE; rv:1.0.1) Gecko/20020823 Netscape/7.0
  // Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en) AppleWebKit/51 (like Gecko) Safari/51
  // Lynx/2.8.4rel.1 libwww-FM/2.14 SSL-MM/1.4.1 OpenSSL/0.9.6g
  // Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en-US; rv:1.0.1) Gecko/20021109 Chimera/0.6+
  // Mozilla/5.0 (Windows; U; Win 9x 4.90; en-US; rv:1.3a) Gecko/20021207 Phoenix/0.5
  // Mozilla/5.0 Galeon/1.2.7 (X11; Linux i686; U;) Gecko/20021204
  // Mozilla/4.0 (compatible; MSIE 5.0; Windows XP) Opera 6.05 [ja]
  // Mozilla/4.0 (compatible; MSIE 5.12; Mac_PowerPC) OmniWeb/4.1.1-v424.6
  // Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4b) Gecko/20030516 Mozilla Firebird/0.6
  // Mozilla/5.0 (Windows; U; WinNT4.0; en-US; rv:1.5a) Gecko/20030728 Mozilla Firebird/0.6.1
  // Python-urllib/1.15
  // *** search bots: ***
  // Scooter/3.3
  // Spinne/2.0 med_AH
  // Vagabondo/2.0 MT (webagent at wise-guys dot nl)
  // TurnitinBot/1.5 ( ">http://www.turnitin.com/robot/crawlerinfo.html)
  // FAST-WebCrawler/3.x Multimedia (mm dash crawler at fast dot no)
  // Firefly/1.0 (compatible; Mozilla 4.0; MSIE 5.5)
  // Googlebot/2.1 (+ ">http://www.googlebot.com/bot.html)
  // Scrubby/2.2 ( ">http://www.scrubtheweb.com/)
  // psbot/0.1 (+ ">http://www.picsearch.com/bot.html)
  // NG/1.0
  // URL_Spider_Pro/3.0 ( ">http://www.innerprise.net/usp-spider.asp)"
  // Pompos/1.3 ">http://dir.com/pompos.html
  // Szukacz/1.5 (robot; www.szukacz.pl/jakdzialarobot.html; info@szukacz.pl)
  // ASPseek/1.2.10
  // NPBot-1/2.0
  // NetResearchServer/2.7(loopimprovements.com/robot.html)
  // dloader(NaverRobot)/1.0
  // Mozilla/4.0 compatible ZyBorg/1.0 Daily Refresh Beta-d03 (wn.zyborg@looksmart.net;
  // Mozilla/2.0 (compatible; Ask Jeeves/Teoma)
  // Mozilla/5.0 (Slurp/si; slurp@inktomi.com; ">http://www.inktomi.com/slurp.html)
  // Mozilla/5.0 [en] (compatible; Gulper Web Bot 0.2.4 www.ecsl.cs.sunysb.edu/~maxim/cgi-bin/Link/GulperBot)
  // Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; Girafabot; girafabot at girafa dot com;
  // Mozilla/4.0 (efp@gmx.net)
  // Mozilla/4.5 (compatible; HTTrack 3.0x; Windows 98)
  // PingALink Monitoring Services 1.0 (http://www.pingalink.com)
  // IlTrovatore-Setaccio (+ ">http://www.iltrovatore.it)
  // Mercator-2.0
  // appie 1.1 (www.walhello.com)
  // larbin_2.6.2 (larbin2.6.2@unspecified.mail)
  // OWR_Crawler 0.1
  // search.ch V1.4.2 (spiderman@search.ch;
  // WebFilter Robot 1.0
  // Openfind data gatherer, Openbot/3.0+(robot-response@openfind.com.tw;+
  // LinkWalker
  // Internet Explorer 5.5
  // BaiDuSpider
  // Mozilla/4.0 (compatible; B-l-i-t-z-B-O-T)
  // B l i t z B O T @ t r i c u s . n e t (Mozilla compatible)
  // sitecheck.internetseer.com (For more info see: ">http://sitecheck.internetseer.com)
  // http://www.almaden.ibm.com/cs/crawler   [c01]
  // ia_archiver
  // Nutch
  // Mozilla
  // HeinrichderMiragoRobot
  // dumbBot

  var $uastring;
  var $brand;
  var $version;
  var $bot = false;

  function userAgent($ua_string = "") {
    // *** constructor ***
    if (strlen($ua_string)) {
      $this->uastring = $ua_string;
    }
    else {
      // read raw UA string
      $this->uastring = $_SERVER["HTTP_USER_AGENT"];
    }

    // get UA brand and version
    $this->brand = "Unknown"; $this->version = 0;
    if (ereg("([0-9a-zA-Z\.()-]+)/([0-9a-zA-Z\.+]+)", $this->uastring, $regs)) {
      $this->brand = $regs[1]; // this is a reasonable default :)
      $this->version = $regs[2]; // this is a reasonable default :)
    }
    if (ereg("Netscape6/([0-9a-zA-Z\.+]+)", $this->uastring, $regs)) {
      $this->brand = "Netscape";
      $this->version = $regs[1];
    }
    elseif (ereg("Netscape/([0-9a-zA-Z\.+]+)", $this->uastring, $regs)) {
      $this->brand = "Netscape";
      $this->version = $regs[1];
    }
    elseif (ereg("Chimera/([0-9a-zA-Z\.+]+)", $this->uastring, $regs)) {
      $this->brand = "Chimera";
      $this->version = $regs[1];
    }
    elseif (ereg("Phoenix/([0-9a-zA-Z\.+]+)", $this->uastring, $regs)) {
      $this->brand = "Phoenix";
      $this->version = $regs[1];
    }
    elseif (ereg("Mozilla Firebird/([0-9a-zA-Z\.+]+)", $this->uastring, $regs)) {
      $this->brand = "Mozilla Firebird";
      $this->version = $regs[1];
    }
    elseif (ereg("Galeon/([0-9a-zA-Z\.+]+)", $this->uastring, $regs)) {
      $this->brand = "Galeon";
      $this->version = $regs[1];
    }
    elseif (ereg("rv:([0-9a-zA-Z\.+]+)", $this->uastring, $regs) && strstr($this->uastring, "Mozilla/") && strstr($this->uastring, "Gecko/")) {
      $this->brand = "Mozilla";
      $this->version = $regs[1];
    }
    elseif (ereg("Opera[ /]([0-9a-zA-Z\.+]+)", $this->uastring, $regs)) {
      $this->brand = "Opera";
      $this->version = $regs[1];
    }
    elseif (ereg("OmniWeb/([0-9a-zA-Z\.+]+)", $this->uastring, $regs)) {
      $this->brand = "OmniWeb";
      $this->version = $regs[1];
    }
    elseif (ereg("Konqueror/([0-9a-zA-Z\.+]+)", $this->uastring, $regs)) {
      $this->brand = "Konqueror";
      $this->version = $regs[1];
    }
    elseif (ereg("Safari/([0-9a-zA-Z\.+]+)", $this->uastring, $regs)) {
      $this->brand = "Safari";
      $this->version = $regs[1];
    }
    elseif (ereg("AppleWebKit/([0-9a-zA-Z\.+]+)", $this->uastring, $regs)) {
      $this->brand = "AppleWebKit";
      $this->version = $regs[1];
    }
    elseif (ereg("ZyBorg/([0-9a-zA-Z\.+]+)", $this->uastring, $regs)) {
      $this->brand = "ZyBorg";
      $this->version = $regs[1];
      $this->bot = true;
    }
    elseif (ereg("Ask Jeeves/([0-9a-zA-Z\.+]+)", $this->uastring, $regs)) {
      $this->brand = "Ask Jeeves";
      $this->version = $regs[1];
      $this->bot = true;
    }
    elseif (ereg("Slurp/([0-9a-zA-Z\.+]+)", $this->uastring, $regs)) {
      $this->brand = "Slurp";
      $this->version = $regs[1];
      $this->bot = true;
    }
    elseif (ereg("Openbot/([0-9a-zA-Z\.+]+)", $this->uastring, $regs)) {
      $this->brand = "Openbot";
      $this->version = $regs[1];
      $this->bot = true;
    }
    elseif (ereg("Mercator-([0-9a-zA-Z\.+]+)", $this->uastring, $regs)) {
      $this->brand = "Mercator";
      $this->version = $regs[1];
      $this->bot = true;
    }
    elseif (ereg("appie ([0-9a-zA-Z\.+]+)", $this->uastring, $regs)) {
      $this->brand = "appie";
      $this->version = $regs[1];
      $this->bot = true;
    }
    elseif (ereg("larbin_([0-9a-zA-Z\.+]+)", $this->uastring, $regs)) {
      $this->brand = "larbin";
      $this->version = $regs[1];
      $this->bot = true;
    }
    elseif (ereg("Gulper Web Bot ([0-9a-zA-Z\.+]+)", $this->uastring, $regs)) {
      $this->brand = "Gulper Web Bot";
      $this->version = $regs[1];
      $this->bot = true;
    }
    elseif (ereg("HTTrack ([0-9a-zA-Z\.+]+)", $this->uastring, $regs)) {
      $this->brand = "HTTrack";
      $this->version = $regs[1];
      $this->bot = true;
    }
    elseif (ereg("OWR_Crawler ([0-9a-zA-Z\.+]+)", $this->uastring, $regs)) {
      $this->brand = "OWR_Crawler";
      $this->version = $regs[1];
      $this->bot = true;
    }
    elseif (ereg("search.ch ([0-9a-zA-Z\.+]+)", $this->uastring, $regs)) {
      $this->brand = "search.ch";
      $this->version = $regs[1];
      $this->bot = true;
    }
    elseif (ereg("WebFilter Robot ([0-9a-zA-Z\.+]+)", $this->uastring, $regs)) {
      $this->brand = "WebFilter Robot";
      $this->version = $regs[1];
      $this->bot = true;
    }
    elseif (ereg("^LinkWalker", $this->uastring)) {
      $this->brand = "LinkWalker";
      $this->version = "";
      $this->bot = true;
    }
    elseif (ereg("^Internet Explorer 5.5", $this->uastring)) {
      $this->brand = "Unknown bot (IE5.5)";
      $this->version = "";
      $this->bot = true;
    }
    elseif (ereg("^Mozilla[\s ]*$", $this->uastring)) {
      $this->brand = "Unknown bot (Mozilla)";
      $this->version = "";
      $this->bot = true;
    }
    elseif (ereg("^BaiDuSpider", $this->uastring)) {
      $this->brand = "BaiDuSpider";
      $this->version = "";
      $this->bot = true;
    }
    elseif (ereg("^ia_archiver", $this->uastring)) {
      $this->brand = "ia_archiver";
      $this->version = "";
      $this->bot = true;
    }
    elseif (ereg("^PingALink", $this->uastring)) {
      $this->brand = "PingALink";
      $this->version = "";
      $this->bot = true;
    }
    elseif (ereg("^IlTrovatore-Setaccio", $this->uastring)) {
      $this->brand = "IlTrovatore-Setaccio";
      $this->version = "";
      $this->bot = true;
    }
    elseif (ereg("^Nutch", $this->uastring)) {
      $this->brand = "Nutch";
      $this->version = "";
      $this->bot = true;
    }
    elseif (ereg("^dumbBot", $this->uastring)) {
      $this->brand = "dumbBot";
      $this->version = "";
      $this->bot = true;
    }
    elseif (ereg("http://www.almaden.ibm.com/cs/crawler", $this->uastring)) {
      $this->brand = "almaden crawler";
      $this->version = "";
      $this->bot = true;
    }
    elseif (ereg("B-l-i-t-z-B-O-T", $this->uastring) || ereg("B l i t z B O T @ t r i c u s . n e t", $this->uastring)) {
      $this->brand = "BlitzBOT";
      $this->version = "";
      $this->bot = true;
    }
    elseif (ereg("sitecheck.internetseer.com", $this->uastring)) {
      $this->brand = "internetseer";
      $this->version = "";
      $this->bot = true;
    }
    elseif (ereg("Girafabot", $this->uastring)) {
      $this->brand = "Girafabot";
      $this->version = "";
      $this->bot = true;
    }
    elseif (ereg("efp@gmx.net", $this->uastring)) {
      $this->brand = "efp";
      $this->version = "";
      $this->bot = true;
    }
    elseif (ereg("HeinrichderMiragoRobot", $this->uastring)) {
      $this->brand = "HeinrichderMiragoRobot";
      $this->version = "";
      $this->bot = true;
    }
    elseif (ereg("MSIE ([0-9a-zA-Z\.+]+)", $this->uastring, $regs)) {
      $this->brand = "Microsoft Internet Explorer";
      $this->version = $regs[1];
    }
    elseif (ereg("Mozilla/([0-9a-zA-Z\.+]+)", $this->uastring, $regs) && !strstr($this->uastring, "compatible;") && !strstr($this->uastring, "Gecko/")) {
      $this->brand = "Netscape";
      $this->version = $regs[1];
      if (intval($this->version) == 4) { $this->brand .= " Communicator"; }
    }

    $botArray = array("Scooter","Spinne","Vagabondo","TurnitinBot","FAST-WebCrawler","Firefly","Googlebot",
                      "Scrubby","psbot","NG","URL_Spider_Pro","Pompos","Szukacz","ASPseek","NPBot-1",
                      "dloader(NaverRobot)","NetResearchServer","","","","","","","");

    if (in_array($this->brand, $botArray)) {
      $this->bot = true;
    }
  }

  function getBrand() { return $this->brand; }
  function getVersion() { return $this->version; }
  function isbot() { return $this->bot; }

  function isns() {
    // set it static so that we don't have to call it that often
    static $is_ns;
    if (!isset($is_ns)) {
      $is_ns = false;
      if (strstr($this->brand, "Netscape")) {
        $is_ns = true;
      }
    }
  return $is_ns;
  }

  function isns4() {
    // set it static so that we don't have to call it that often
    static $is_ns4;
    if (!isset($is_ns4)) {
      $is_ns4 = false;
      if (strstr($this->brand, "Netscape") && (intval($this->version) == 4)) {
        $is_ns4 = true;
      }
    }
  return $is_ns4;
  }

  function isie() {
    // set it static so that we don't have to call it that often
    static $is_ie;
    if (!isset($is_ie)) {
      $is_ie = false;
      if (strstr($this->brand, "Internet Explorer")) {
        $is_ie = true;
      }
    }
  return $is_ie;
  }

  function geckobased() {
    // set it static so that we don't have to call it that often
    static $is_gecko;
    if (!isset($is_gecko)) {
      $is_gecko = false;
      if (strstr($this->uastring, "Gecko/")) {
        $is_gecko = true;
      }
    }
  return $is_gecko;
  }

  function geckodate() {
    // set it static so that we don't have to call it that often
    static $gdate;
    if (!isset($gdate)) {
      $gdate = 0;
      if (ereg("Gecko/([0-9]+)", $this->uastring, $regs)) {
        $gdate = $regs[1];
      }
    }
  return $gdate;
  }

  function khtmlbased() {
    // set it static so that we don't have to call it that often
    static $is_khtml;
    if (!isset($is_khtml)) {
      $is_khtml = false;
      if (strstr($this->brand, "Konqueror") || strstr($this->brand, "Safari") || strstr($this->brand, "AppleWebKit")) {
        $is_khtml = true;
      }
    }
  return $is_khtml;
  }
}
?>