/libs/Browser.php

<?php

	/**

	 * File: Browser.php

	 * Author: Chris Schuld (http://chrisschuld.com/)

	 * Last Modified: November 08, 2009

	 * @version 1.6

	 * @package PegasusPHP

	 * 

	 * Copyright (C) 2008-2009 Chris Schuld  (chris@chrisschuld.com)

	 *

	 * This program is free software; you can redistribute it and/or

	 * modify it under the terms of the GNU General Public License as

	 * published by the Free Software Foundation; either version 2 of

	 * the License, or (at your option) any later version.

	 *

	 * This program is distributed in the hope that it will be useful,

	 * but WITHOUT ANY WARRANTY; without even the implied warranty of

	 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

	 * GNU General Public License for more details at:

	 * http://www.gnu.org/copyleft/gpl.html

	 *

	 *

	 * Typical Usage:

	 * 

	 *   $browser = new Browser();

	 *   if( $browser->getBrowser() == Browser::BROWSER_FIREFOX && $browser->getVersion() >= 2 ) {

	 *   	echo 'You have FireFox version 2 or greater';

	 *   }

	 *

	 * User Agents Sampled from: http://www.useragentstring.com/

	 * 

	 * This implementation is based on the original work from Gary White

	 * http://apptools.com/phptools/browser/

	 * 

	 * Gary White noted: "Since browser detection is so unreliable, I am

	 * no longer maintaining this script. You are free to use and or

	 * modify/update it as you want, however the author assumes no

	 * responsibility for the accuracy of the detected values."

	 * 

	 * Anyone experienced with Gary's script might be interested in these notes:

	 * 

	 *   Added class constants

	 *   Added detection and version detection for Google's Chrome

	 *   Updated the version detection for Amaya

	 *   Updated the version detection for Firefox

	 *   Updated the version detection for Lynx

	 *   Updated the version detection for WebTV

	 *   Updated the version detection for NetPositive

	 *   Updated the version detection for IE

	 *   Updated the version detection for OmniWeb

	 *   Updated the version detection for iCab

	 *   Updated the version detection for Safari

	 *   Updated Safari to remove mobile devices (iPhone)

	 *   Added detection for iPhone

	 *   Added detection for robots

	 *   Added detection for mobile devices

	 *   Added detection for BlackBerry

	 *   Removed Netscape checks (matches heavily with firefox & mozilla)

	 * 

	 * 

	 * ADDITIONAL UPDATES:

	 * 

	 * 2008-11-07:

	 *  + Added Google's Chrome to the detection list

	 *  + Added isBrowser(string) to the list of functions special thanks to

	 *    Daniel 'mavrick' Lang for the function concept (http://mavrick.id.au)

	 * 

	 * 2008-12-09:

	 *  + Removed unused constant

	 *

	 * 2009-02-16: (Rick Hale)

	 *  + Added version detection for Android phones.

	 * 

	 * 2009-03-14:

	 *  + Added detection for iPods.

	 *  + Added Platform detection for iPhones

	 *  + Added Platform detection for iPods

	 * 

	 * 2009-04-22:

	 *  + Added detection for GoogleBot

	 *  + Added detection for the W3C Validator.

	 *  + Added detection for Yahoo! Slurp

	 * 

	 * 2009-04-27:

	 *  + Updated the IE check to remove a typo and bug (thanks John)

	 *  

	 * 2009-08-18:

	 *  + Updated to support PHP 5.3 - removed all deprecated function calls

	 *  + Updated to remove all double quotes (") -- converted to single quotes (')

	 *  
     * 2009-11-08:

     *  + PHP 5.3 Support
     *  + Added support for BlackBerry OS and BlackBerry browser
     *  + Added support for the Opera Mini browser

     *  + Added additional documenation

     *  + Added support for isRobot() and isMobile()

     *  + Added support for Opera version 10

     *  + Added support for deprecated Netscape Navigator version 9

     *  + Added support for IceCat

     *  + Added support for Shiretoko

     */



	class Browser {

		private $_agent = '';

		private $_browser_name = '';

		private $_version = '';

		private $_platform = '';

		private $_os = '';

		private $_is_aol = false;
        private $_is_mobile = false;
        private $_is_robot = false;

		private $_aol_version = '';



		const BROWSER_UNKNOWN = 'unknown';

		const VERSION_UNKNOWN = 'unknown';

		

		const BROWSER_OPERA = 'Opera';                            // http://www.opera.com/
        const BROWSER_OPERA_MINI = 'Opera Mini';                  // http://www.opera.com/mini/

		const BROWSER_WEBTV = 'WebTV';                            // http://www.webtv.net/pc/

		const BROWSER_IE = 'Internet Explorer';                   // http://www.microsoft.com/ie/

		const BROWSER_POCKET_IE = 'Pocket Internet Explorer';     // http://en.wikipedia.org/wiki/Internet_Explorer_Mobile

		const BROWSER_KONQUEROR = 'Konqueror';                    // http://www.konqueror.org/

		const BROWSER_ICAB = 'iCab';                              // http://www.icab.de/

		const BROWSER_OMNIWEB = 'OmniWeb';                        // http://www.omnigroup.com/applications/omniweb/

		const BROWSER_FIREBIRD = 'Firebird';                      // http://www.ibphoenix.com/

		const BROWSER_FIREFOX = 'Firefox';                        // http://www.mozilla.com/en-US/firefox/firefox.html

		const BROWSER_SHIRETOKO = 'Shiretoko';                    // http://wiki.mozilla.org/Projects/shiretoko

		const BROWSER_MOZILLA = 'Mozilla';                        // http://www.mozilla.com/en-US/

		const BROWSER_AMAYA = 'Amaya';                            // http://www.w3.org/Amaya/

		const BROWSER_LYNX = 'Lynx';                              // http://en.wikipedia.org/wiki/Lynx

		const BROWSER_SAFARI = 'Safari';                          // http://apple.com

		const BROWSER_IPHONE = 'iPhone';                          // http://apple.com

        const BROWSER_IPOD = 'iPod';                              // http://apple.com 

		const BROWSER_CHROME = 'Chrome';                          // http://www.google.com/chrome

        const BROWSER_ANDROID = 'Android';                        // http://www.android.com/

        const BROWSER_GOOGLEBOT = 'GoogleBot';                    // http://en.wikipedia.org/wiki/Googlebot

        const BROWSER_SLURP = 'Yahoo! Slurp';                     // http://en.wikipedia.org/wiki/Yahoo!_Slurp

        const BROWSER_W3CVALIDATOR = 'W3C Validator';             // http://validator.w3.org/
        const BROWSER_BLACKBERRY = 'BlackBerry';                  // http://www.blackberry.com/

        const BROWSER_ICECAT = 'IceCat';                          // http://en.wikipedia.org/wiki/GNU_IceCat

		

        const BROWSER_NETSCAPE_NAVIGATOR = 'Netscape Navigator';  // http://browser.netscape.com/ (DEPRECATED)

		const BROWSER_GALEON = 'Galeon';                          // http://galeon.sourceforge.net/ (DEPRECATED)

		const BROWSER_NETPOSITIVE = 'NetPositive';                // http://en.wikipedia.org/wiki/NetPositive (DEPRECATED)

		const BROWSER_PHOENIX = 'Phoenix';                        // http://en.wikipedia.org/wiki/History_of_Mozilla_Firefox (DEPRECATED)

        

		const PLATFORM_UNKNOWN = 'unknown';

		const PLATFORM_WINDOWS = 'Windows';

		const PLATFORM_WINDOWS_CE = 'Windows CE';

		const PLATFORM_APPLE = 'Apple';

		const PLATFORM_LINUX = 'Linux';

		const PLATFORM_OS2 = 'OS/2';

		const PLATFORM_BEOS = 'BeOS';

		const PLATFORM_IPHONE = 'iPhone';

		const PLATFORM_IPOD = 'iPod';
        const PLATFORM_BLACKBERRY = 'BlackBerry';

		

		const OPERATING_SYSTEM_UNKNOWN = 'unknown';

		

		public function __construct() {

			$this->reset();

			$this->determine();

		}

		/**

		 * Reset all properties

		 */

		public function reset() {

			$this->_agent = isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : "";

			$this->_browser_name = self::BROWSER_UNKNOWN;

			$this->_version = self::VERSION_UNKNOWN;

			$this->_platform = self::PLATFORM_UNKNOWN;

			$this->_os = self::OPERATING_SYSTEM_UNKNOWN;

			$this->_is_aol = false;
            $this->_is_mobile = false;
            $this->_is_robot = false;

			$this->_aol_version = self::VERSION_UNKNOWN;

		}

		

		/**

		 * Check to see if the specific browser is valid

		 * @param string $browserName

		 * @return True if the browser is the specified browser

		 */

		function isBrowser($browserName) { return( 0 == strcasecmp($this->_browser_name, trim($browserName))); }



		/**

		 * The name of the browser.  All return types are from the class contants

		 * @return string Name of the browser

		 */

		public function getBrowser() { return $this->_browser_name; }

		/**

		 * Set the name of the browser

		 * @param $browser The name of the Browser

		 */

		public function setBrowser($browser) { return $this->_browser_name = $browser; }

		/**

		 * The name of the platform.  All return types are from the class contants

		 * @return string Name of the browser

		 */

		public function getPlatform() { return $this->_platform; }

		/**

		 * Set the name of the platform

		 * @param $platform The name of the Platform

		 */

		public function setPlatform($platform) { return $this->_platform = $platform; }

		/**

		 * The version of the browser.

		 * @return string Version of the browser (will only contain alpha-numeric characters and a period)

		 */

		public function getVersion() { return $this->_version; }

		/**

		 * Set the version of the browser

		 * @param $version The version of the Browser

		 */

		public function setVersion($version) { $this->_version = preg_replace('[^0-9,.,a-z,A-Z]','',$version); }

		/**

		 * The version of AOL.

		 * @return string Version of AOL (will only contain alpha-numeric characters and a period)

		 */

		public function getAolVersion() { return $this->_aol_version; }

		/**

		 * Set the version of AOL

		 * @param $version The version of AOL

		 */

		public function setAolVersion($version) { $this->_aol_version = preg_replace('[^0-9,.,a-z,A-Z]','',$version); }

		/**
		 * Is the browser from AOL?
		 * @return boolean True if the browser is from AOL otherwise false
		 */
		public function isAol() { return $this->_is_aol; }
		/**
		 * Is the browser from a mobile device?
		 * @return boolean True if the browser is from a mobile device otherwise false
		 */
		public function isMobile() { return $this->_is_mobile; }
		/**
		 * Is the browser from a robot (ex Slurp,GoogleBot)?
		 * @return boolean True if the browser is from a robot otherwise false
		 */
		public function isRobot() { return $this->_is_robot; }
		/**

		 * Set the browser to be from AOL

		 * @param $isAol

		 */

		public function setAol($isAol) { $this->_is_aol = $isAol; }

		/**

		 * Get the user agent value in use to determine the browser

		 * @return string The user agent from the HTTP header

		 */

		public function getUserAgent() { return $this->_agent; }

		/**

		 * Set the user agent value (the construction will use the HTTP header value - this will overwrite it)

		 * @param $agent_string The value for the User Agent

		 */

		public function setUserAgent($agent_string) {

			$this->reset();

			$this->_agent = $agent_string;

			$this->determine();

		}
        protected function setMobile($value=true) {
            $this->_is_mobile = $value;
        }
        protected function setRobot($value=true) {
            $this->_is_robot = $value;
        }

		/**

		 * Protected routine to calculate and determine what the browser is in use (including platform)

		 */

		protected function determine() {

			$this->checkPlatform();

			$this->checkBrowsers();

			$this->checkForAol();

		}



		/**

		 * Protected routine to determine the browser type

		 * @return boolean True if the browser was detected otherwise false

		 */

		protected function checkBrowsers() {
			return (

						$this->checkBrowserGoogleBot() ||

						$this->checkBrowserSlurp() ||

						$this->checkBrowserInternetExplorer() ||

						$this->checkBrowserShiretoko() ||

						$this->checkBrowserIceCat() ||

						$this->checkBrowserNetscapeNavigator9Plus() ||

						$this->checkBrowserFirefox() ||

						$this->checkBrowserChrome() ||

                        $this->checkBrowserAndroid() ||

						$this->checkBrowserSafari() ||

						$this->checkBrowserOpera() ||

						$this->checkBrowserNetPositive() ||

						$this->checkBrowserFirebird() ||

						$this->checkBrowserGaleon() ||

						$this->checkBrowserKonqueror() ||

						$this->checkBrowserIcab() ||

						$this->checkBrowserOmniWeb() ||

						$this->checkBrowserPhoenix() ||

						$this->checkBrowserWebTv() ||

						$this->checkBrowserAmaya() ||

						$this->checkBrowserLynx() ||

						$this->checkBrowseriPhone() ||

						$this->checkBrowseriPod() ||
                        $this->checkBrowserBlackBerry() ||

						$this->checkBrowserW3CValidator() ||

						$this->checkBrowserMozilla() /* Mozilla is such an open standard that you must check it last */	

						);

		}


		/**

		 * Determine if the user is using a BlackBerry

		 * @return boolean True if the browser is the BlackBerry browser otherwise false

		 */
		protected function checkBrowserBlackBerry() {
			$retval = false;
			if( preg_match('/blackberry/i',$this->_agent) ) {
				$aresult = explode("/",stristr($this->_agent,"BlackBerry"));
				$aversion = explode(' ',$aresult[1]);
				$this->setVersion($aversion[0]);
				$this->_browser_name = self::BROWSER_BLACKBERRY;
				$this->setMobile();
				$retval = true;
			}
			return $retval;
		}



		/**

		 * Determine if the user is using an AOL User Agent

		 * @return boolean True if the browser is from AOL otherwise false

		 */

		protected function checkForAol() {

			$retval = false;

			if( preg_match('/aol/i', $this->_agent) ) {

				$aversion = explode(' ',stristr($this->_agent, 'AOL'));

				$this->setAol(true);

				$this->setAolVersion(preg_replace('/[^0-9\.a-z]/i', '', $aversion[1]));

				$retval = true;

			}

			else {

				$this->setAol(false);

				$this->setAolVersion(self::VERSION_UNKNOWN);

				$retval = true;

			}

			return $retval;

		}

		

		/**

		 * Determine if the browser is the GoogleBot or not

		 * @return boolean True if the browser is the GoogletBot otherwise false

		 */

		protected function checkBrowserGoogleBot() {

			$retval = false;

			if( preg_match('/googlebot/i',$this->_agent) ) {

				$aresult = explode('/',stristr($this->_agent,'googlebot'));

				$aversion = explode(' ',$aresult[1]);

				$this->setVersion(str_replace(';','',$aversion[0]));

				$this->_browser_name = self::BROWSER_GOOGLEBOT;
                $this->setRobot();

				$retval = true;

			}

			return $retval;

		}

				

		/**

		 * Determine if the browser is the W3C Validator or not

		 * @return boolean True if the browser is the W3C Validator otherwise false

		 */

		protected function checkBrowserW3CValidator() {

			$retval = false;

			if( preg_match('/W3C-checklink/i',$this->_agent) ) {

				$aresult = explode('/',stristr($this->_agent,'W3C-checklink'));

				$aversion = explode(' ',$aresult[1]);

				$this->setVersion($aversion[0]);

				$this->_browser_name = self::BROWSER_W3CVALIDATOR;

				$retval = true;

			}

			return $retval;

		}

		

		/**

		 * Determine if the browser is the W3C Validator or not

		 * @return boolean True if the browser is the W3C Validator otherwise false

		 */

		protected function checkBrowserSlurp() {

			$retval = false;

			if( preg_match('/Slurp/i',$this->_agent) ) {

				$aresult = explode('/',stristr($this->_agent,'Slurp'));

				$aversion = explode(' ',$aresult[1]);

				$this->setVersion($aversion[0]);

				$this->_browser_name = self::BROWSER_SLURP;
                $this->setRobot();

				$retval = true;

			}

			return $retval;

		}

		

		/**

		 * Determine if the browser is Internet Explorer or not

		 * @return boolean True if the browser is Internet Explorer otherwise false

		 */

		protected function checkBrowserInternetExplorer() {

			$retval = false;



			// Test for v1 - v1.5 IE

			if( preg_match('/microsoft internet explorer/i', $this->_agent) ) {

				$this->setBrowser(self::BROWSER_IE);

				$this->setVersion('1.0');

				$aresult = stristr($this->_agent, '/');

				if( preg_match('/308|425|426|474|0b1/i', $aresult) ) {

					$this->setVersion('1.5');

				}

				$retval = true;

			}

			// Test for versions > 1.5

			else if( preg_match('/msie/i',$this->_agent) && !preg_match('/opera/i',$this->_agent) ) {

				$aresult = explode(' ',stristr(str_replace(';','; ',$this->_agent),'msie'));

				$this->setBrowser( self::BROWSER_IE );

				$this->setVersion(str_replace(array('(',')',';'),'',$aresult[1]));

				$retval = true;

			}

			// Test for Pocket IE

			else if( preg_match('/mspie/i',$this->_agent) || preg_match('/pocket/i', $this->_agent) ) {

				$aresult = explode(' ',stristr($this->_agent,'mspie'));

				$this->setPlatform( self::PLATFORM_WINDOWS_CE );

				$this->setBrowser( self::BROWSER_POCKET_IE );

				$this->setMobile();

				

				if( preg_match('/mspie/i', $this->_agent) ) {

					$this->setVersion($aresult[1]);

				}

				else {

					$aversion = explode('/',$this->_agent);

					$this->setVersion($aversion[1]);

				}

				$retval = true;

			}

			return $retval;

		}

		

		/**

		 * Determine if the browser is Opera or not

		 * @return boolean True if the browser is Opera otherwise false

		 */

		protected function checkBrowserOpera() {

			$retval = false;

			if( preg_match('/opera mini/i',$this->_agent) ) {
				$resultant = stristr($this->_agent, 'opera mini');
				if( preg_match('/\//',$resultant) ) {
					$aresult = explode('/',$resultant);
					$aversion = explode(' ',$aresult[1]); 
					$this->setVersion($aversion[0]);
					$this->_browser_name = self::BROWSER_OPERA_MINI;

					$this->setMobile();
                    $retval = true;
				}
				else {
					$aversion = explode(' ',stristr($resultant,'opera mini'));
					$this->setVersion($aversion[1]);
					$this->_browser_name = self::BROWSER_OPERA_MINI;

					$this->setMobile();
					$retval = true;
				}
			}
			else if( preg_match('/opera/i',$this->_agent) ) {
				$resultant = stristr($this->_agent, 'opera');
				if( preg_match('/Version\/(10.*)$/',$resultant,$matches) ) {

					$this->setVersion($matches[1]);

					$this->_browser_name = self::BROWSER_OPERA;

					$retval = true;

				}

				else if( preg_match('/\//',$resultant) ) {

					$aresult = explode('/',$resultant);
					$aversion = explode(' ',$aresult[1]); 
					$this->setVersion($aversion[0]);
					$this->_browser_name = self::BROWSER_OPERA;
					$retval = true;
				}
				else {
					$aversion = explode(' ',stristr($resultant,'opera'));
					$this->setVersion($aversion[1]);
					$this->_browser_name = self::BROWSER_OPERA;
					$retval = true;
				}
			}
			return $retval;

		}

		

		/**

		 * Determine if the browser is WebTv or not

		 * @return boolean True if the browser is WebTv otherwise false

		 */

		protected function checkBrowserWebTv() {

			$retval = false;

			if( preg_match('/webtv/i',$this->_agent) ) {

				$aresult = explode('/',stristr($this->_agent,'webtv'));

				$aversion = explode(' ',$aresult[1]);

				$this->setVersion($aversion[0]);

				$this->_browser_name = self::BROWSER_WEBTV;

				$retval = true;

			}

			return $retval;

		}

				

		/**

		 * Determine if the browser is NetPositive or not

		 * @return boolean True if the browser is NetPositive otherwise false

		 */

		protected function checkBrowserNetPositive() {

			$retval = false;

			if( preg_match('/NetPositive/i',$this->_agent) ) {

				$aresult = explode('/',stristr($this->_agent,'NetPositive'));

				$aversion = explode(' ',$aresult[1]);

				$this->setVersion(str_replace(array('(',')',';'),'',$aversion[0]));

				$this->_browser_name = self::BROWSER_NETPOSITIVE;

				$this->_platform = self::PLATFORM_BEOS;

				$retval = true;

			}

			return $retval;

		}

			

		/**

		 * Determine if the browser is Galeon or not

		 * @return boolean True if the browser is Galeon otherwise false

		 */

		protected function checkBrowserGaleon() {

			$retval = false;

			if( preg_match('/galeon/i',$this->_agent) ) {

				$aresult = explode(' ',stristr($this->_agent,'galeon'));

				$aversion = explode('/',$aresult[0]);

				$this->setVersion($aversion[1]);

				$this->setBrowser(self::BROWSER_GALEON);

				$retval = true;

			}

			return $retval;

		}

			

		/**

		 * Determine if the browser is Konqueror or not

		 * @return boolean True if the browser is Konqueror otherwise false

		 */

		protected function checkBrowserKonqueror() {

			$retval = false;

			if( preg_match('/Konqueror/i',$this->_agent) ) {

				$aresult = explode(' ',stristr($this->_agent,'Konqueror'));

				$aversion = explode('/',$aresult[0]);

				$this->setVersion($aversion[1]);

				$this->setBrowser(self::BROWSER_KONQUEROR);

				$retval = true;

			}

			return $retval;

		}

			

		/**

		 * Determine if the browser is iCab or not

		 * @return boolean True if the browser is iCab otherwise false

		 */

		protected function checkBrowserIcab() {

			$retval = false;

			if( preg_match('/icab/i',$this->_agent) ) {

				$aversion = explode(' ',stristr(str_replace('/',' ',$this->_agent),'icab'));

				$this->setVersion($aversion[1]);

				$this->setBrowser(self::BROWSER_ICAB);

				$retval = true;

			}

			return $retval;

		}

			

		/**

		 * Determine if the browser is OmniWeb or not

		 * @return boolean True if the browser is OmniWeb otherwise false

		 */

		protected function checkBrowserOmniWeb() {

			$retval = false;

			if( preg_match('/omniweb/i',$this->_agent) ) {

				$aresult = explode('/',stristr($this->_agent,'omniweb'));

				$aversion = explode(' ',$aresult[1]);

				$this->setVersion($aversion[0]);

				$this->setBrowser(self::BROWSER_OMNIWEB);

				$retval = true;

			}

			return $retval;

		}

			

		/**

		 * Determine if the browser is Phoenix or not

		 * @return boolean True if the browser is Phoenix otherwise false

		 */

		protected function checkBrowserPhoenix() {

			$retval = false;

			if( preg_match('/Phoenix/i',$this->_agent) ) {

				$aversion = explode('/',stristr($this->_agent,'Phoenix'));

				$this->setVersion($aversion[1]);

				$this->setBrowser(self::BROWSER_PHOENIX);

				$retval = true;

			}

			return $retval;

		}

		

		/**

		 * Determine if the browser is Firebird or not

		 * @return boolean True if the browser is Firebird otherwise false

		 */

		protected function checkBrowserFirebird() {

			$retval = false;

			if( preg_match('/Firebird/i',$this->_agent) ) {

				$aversion = explode('/',stristr($this->_agent,'Firebird'));

				$this->setVersion($aversion[1]);

				$this->setBrowser(self::BROWSER_FIREBIRD);

				$retval = true;

			}

			return $retval;

		}

		

		/**

		 * Determine if the browser is Netscape Navigator 9+ or not (http://browser.netscape.com/ - Official support ended on March 1st, 2008)

		 * @return boolean True if the browser is Netscape Navigator 9+ otherwise false

		 */

		protected function checkBrowserNetscapeNavigator9Plus() {

			$retval = false;

			if( preg_match('/Firefox/i',$this->_agent) && preg_match('/Navigator\/([^ ]*)/i',$this->_agent,$matches) ) {

				$this->setVersion($matches[1]);

				$this->setBrowser(self::BROWSER_NETSCAPE_NAVIGATOR);

				$retval = true;

			}

			return $retval;

		}

		

		/**

		 * Determine if the browser is Shiretoko or not (https://wiki.mozilla.org/Projects/shiretoko)

		 * @return boolean True if the browser is Shiretoko otherwise false

		 */

		protected function checkBrowserShiretoko() {

			$retval = false;

			if( preg_match('/Mozilla/i',$this->_agent) && preg_match('/Shiretoko\/([^ ]*)/i',$this->_agent,$matches) ) {

				$this->setVersion($matches[1]);

				$this->setBrowser(self::BROWSER_SHIRETOKO);

				$retval = true;

			}

			return $retval;

		}

		

		/**

		 * Determine if the browser is Ice Cat or not (http://en.wikipedia.org/wiki/GNU_IceCat)

		 * @return boolean True if the browser is Ice Cat otherwise false

		 */

		protected function checkBrowserIceCat() {

			$retval = false;

			if( preg_match('/Mozilla/i',$this->_agent) && preg_match('/IceCat\/([^ ]*)/i',$this->_agent,$matches) ) {

				$this->setVersion($matches[1]);

				$this->setBrowser(self::BROWSER_ICECAT);

				$retval = true;

			}

			return $retval;

		}

		

		/**

		 * Determine if the browser is Firefox or not

		 * @return boolean True if the browser is Firefox otherwise false

		 */

		protected function checkBrowserFirefox() {

			$retval = false;

			if( preg_match('/Firefox/i',$this->_agent) ) {

				$aresult = explode('/',stristr($this->_agent,'Firefox'));

				$aversion = explode(' ',$aresult[1]);

				$this->setVersion($aversion[0]);

				$this->setBrowser(self::BROWSER_FIREFOX);

				$retval = true;

			}

			return $retval;

		}

		

		/**

		 * Determine if the browser is Mozilla or not

		 * @return boolean True if the browser is Mozilla otherwise false

		 */

		protected function checkBrowserMozilla() {

			$retval = false;

			if( preg_match('/mozilla/i',$this->_agent) && preg_match('/rv:[0-9].[0-9][a-b]?/i',$this->_agent) && !preg_match('/netscape/i',$this->_agent)) {

				$aversion = explode(' ',stristr($this->_agent,'rv:'));

				preg_match('/rv:[0-9].[0-9][a-b]?/i',$this->_agent,$aversion);

				$this->setVersion(str_replace('rv:','',$aversion[0]));

				$this->setBrowser(self::BROWSER_MOZILLA);

				$retval = true;

			}

			else if( preg_match('/mozilla/i',$this->_agent) && preg_match('/rv:[0-9]\.[0-9]/i',$this->_agent) && !preg_match('/netscape/i',$this->_agent) ) {

				$aversion = explode('',stristr($this->_agent,'rv:'));

            	preg_match('/rv:[0-9]\.[0-9]\.[0-9]/i',$this->_agent,$aversion);

            	echo 

				$this->setVersion(str_replace('rv:','',$aversion[0]));

				$this->setBrowser(self::BROWSER_MOZILLA);

				$retval = true;

			}

			return $retval;

		}



		/**

		 * Determine if the browser is Lynx or not

		 * @return boolean True if the browser is Lynx otherwise false

		 */

		protected function checkBrowserLynx() {

			$retval = false;

			if( preg_match('/libwww/i',$this->_agent) && preg_match('/lynx/i', $this->_agent) ) {

				$aresult = explode('/',stristr($this->_agent,'Lynx'));

				$aversion = explode(' ',$aresult[1]);

				$this->setVersion($aversion[0]);

				$this->setBrowser(self::BROWSER_LYNX);

				$retval = true;

			}

			return $retval;

		}

			

		/**

		 * Determine if the browser is Amaya or not

		 * @return boolean True if the browser is Amaya otherwise false

		 */

		protected function checkBrowserAmaya() {

			$retval = false;

			if( preg_match('/libwww/i',$this->_agent) && preg_match('/amaya/i', $this->_agent) ) {

				$aresult = explode('/',stristr($this->_agent,'Amaya'));

				$aversion = explode(' ',$aresult[1]);

				$this->setVersion($aversion[0]);

				$this->setBrowser(self::BROWSER_AMAYA);

				$retval = true;

			}

			return $retval;

		}

			

		/**

		 * Determine if the browser is Chrome or not

		 * @return boolean True if the browser is Chrome otherwise false

		 */

		protected function checkBrowserChrome() {

			$retval = false;

			if( preg_match('/Chrome/i',$this->_agent) ) {

				$aresult = explode('/',stristr($this->_agent,'Chrome'));

				$aversion = explode(' ',$aresult[1]);

				$this->setVersion($aversion[0]);

				$this->setBrowser(self::BROWSER_CHROME);

				$retval = true;

			}

			return $retval;

		}		

		

		/**

		 * Determine if the browser is Safari or not

		 * @return boolean True if the browser is Safari otherwise false

		 */

		protected function checkBrowserSafari() {

			$retval = false;

			if( preg_match('/Safari/i',$this->_agent) && ! preg_match('/iPhone/i',$this->_agent) && ! preg_match('/iPod/i',$this->_agent) ) {

				$aresult = explode('/',stristr($this->_agent,'Version'));

				if( isset($aresult[1]) ) {

					$aversion = explode(' ',$aresult[1]);

					$this->setVersion($aversion[0]);

				}

				else {

					$this->setVersion(self::VERSION_UNKNOWN);

				}

				$this->setBrowser(self::BROWSER_SAFARI);

				$retval = true;

			}

			return $retval;

		}		

		

		/**

		 * Determine if the browser is iPhone or not

		 * @return boolean True if the browser is iPhone otherwise false

		 */

		protected function checkBrowseriPhone() {

			$retval = false;

			if( preg_match('/iPhone/i',$this->_agent) ) {

				$aresult = explode('/',stristr($this->_agent,'Version'));

				if( isset($aresult[1]) ) {

					$aversion = explode(' ',$aresult[1]);

					$this->setVersion($aversion[0]);

				}

				else {

					$this->setVersion(self::VERSION_UNKNOWN);

				}

				$this->setMobile();

				$this->setBrowser(self::BROWSER_IPHONE);

				$retval = true;

			}

			return $retval;

		}		



		/**

		 * Determine if the browser is iPod or not

		 * @return boolean True if the browser is iPod otherwise false

		 */

		protected function checkBrowseriPod() {

			$retval = false;

			if( preg_match('/iPod/i',$this->_agent) ) {

				$aresult = explode('/',stristr($this->_agent,'Version'));

				if( isset($aresult[1]) ) {

					$aversion = explode(' ',$aresult[1]);

					$this->setVersion($aversion[0]);

				}

				else {

					$this->setVersion(self::VERSION_UNKNOWN);

				}

				$this->setMobile();

				$this->setBrowser(self::BROWSER_IPOD);

				$retval = true;

			}

			return $retval;

		}		



		/**

		 * Determine if the browser is Android or not

		 * @return boolean True if the browser is Android otherwise false

		 */

		protected function checkBrowserAndroid() {

			$retval = false;

			if( preg_match('/Android/i',$this->_agent) ) {

				$aresult = explode('/',stristr($this->_agent,'Version'));

				if( isset($aresult[1]) ) {

					$aversion = explode(' ',$aresult[1]);

					$this->setVersion($aversion[0]);

				}

				else {

					$this->setVersion(self::VERSION_UNKNOWN);

				}

				$this->setMobile();

				$this->setBrowser(self::BROWSER_ANDROID);

				$retval = true;

			}

			return $retval;

		}		



		/**

		 * Determine the user's platform

		 */

		protected function checkPlatform() {

			if( preg_match('/iPhone/i', $this->_agent) ) {

				$this->_platform = self::PLATFORM_IPHONE;

			}

			else if( preg_match('/iPod/i', $this->_agent) ) {

				$this->_platform = self::PLATFORM_IPOD;

			}

			else if( preg_match('/BlackBerry/i', $this->_agent) ) {

				$this->_platform = self::PLATFORM_BLACKBERRY;

			}

			else if( preg_match('/win/i', $this->_agent) ) {

				$this->_platform = self::PLATFORM_WINDOWS;

			}

			elseif( preg_match('/mac/i', $this->_agent) ) {

				$this->_platform = self::PLATFORM_APPLE;

			}

			elseif( preg_match('/linux/i', $this->_agent) ) {

				$this->_platform = self::PLATFORM_LINUX;

			}

			elseif( preg_match('/OS\/2/i', $this->_agent) ) {

				$this->_platform = self::PLATFORM_OS2;

			}

			elseif( preg_match('/BeOS/i', $this->_agent) ) {

				$this->_platform = self::PLATFORM_BEOS;

			}

		}

	}

?>