Php Best Codes

Browser Information Detection

Written by @kerixa 18 September 2020
There exist some easy ways to detect the users' browsers information, such as its name, version, etc. However, you might have noticed that these simple codes do not work perfectly. Therefore, it is essential to develop a more complicated code. With the following PHP class, you will be able to quickly get useful information, not only about the visitors' browser, but also the platform (such as Windows, Mac, etc.) and the device used. You may like to save this class in a separate file and include it in your main script. Enjoy!
Code Snippet:

                                                
                                                <!-- this script is provided by www.phpfreecode.com coded by: Kerixa Inc. -->
<?php
$browser = new Browser();
if( $browser->getBrowser() == Browser::BROWSER_FIREFOX && $browser->getVersion() >= 2 ) {
    echo 'You have FireFox version 2 or greater';
}
var_dump($browser);

/////////////////////////////////////
class Browser
{
    private $_agent = '';
    private $_browser_name = '';
    private $_version = '';
    private $_platform = '';
    private $_os = '';
    private $_is_aol = false;
    private $_is_mobile = false;
    private $_is_tablet = false;
    private $_is_robot = false;
    private $_is_facebook = 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_EDGE = 'Edge'; // https://www.microsoft.com/edge
    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'; // https://www.mozilla.org/en-US/firefox/
    const BROWSER_BRAVE = 'Brave'; // https://brave.com/
    const BROWSER_PALEMOON = 'Palemoon'; // https://www.palemoon.org/
    const BROWSER_ICEWEASEL = 'Iceweasel'; // http://www.geticeweasel.org/
    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_IPAD = 'iPad'; // 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_CURL = 'cURL'; // https://en.wikipedia.org/wiki/CURL
    const BROWSER_WGET = 'Wget'; // https://en.wikipedia.org/wiki/Wget
    const BROWSER_UCBROWSER = 'UCBrowser'; // https://www.ucweb.com/


    const BROWSER_YANDEXBOT = 'YandexBot'; // http://yandex.com/bots
    const BROWSER_YANDEXIMAGERESIZER_BOT = 'YandexImageResizer'; // http://yandex.com/bots
    const BROWSER_YANDEXIMAGES_BOT = 'YandexImages'; // http://yandex.com/bots
    const BROWSER_YANDEXVIDEO_BOT = 'YandexVideo'; // http://yandex.com/bots
    const BROWSER_YANDEXMEDIA_BOT = 'YandexMedia'; // http://yandex.com/bots
    const BROWSER_YANDEXBLOGS_BOT = 'YandexBlogs'; // http://yandex.com/bots
    const BROWSER_YANDEXFAVICONS_BOT = 'YandexFavicons'; // http://yandex.com/bots
    const BROWSER_YANDEXWEBMASTER_BOT = 'YandexWebmaster'; // http://yandex.com/bots
    const BROWSER_YANDEXDIRECT_BOT = 'YandexDirect'; // http://yandex.com/bots
    const BROWSER_YANDEXMETRIKA_BOT = 'YandexMetrika'; // http://yandex.com/bots
    const BROWSER_YANDEXNEWS_BOT = 'YandexNews'; // http://yandex.com/bots
    const BROWSER_YANDEXCATALOG_BOT = 'YandexCatalog'; // http://yandex.com/bots

    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_NOKIA_S60 = 'Nokia S60 OSS Browser'; // http://en.wikipedia.org/wiki/Web_Browser_for_S60
    const BROWSER_NOKIA = 'Nokia Browser'; // * all other WAP-based browsers on the Nokia Platform
    const BROWSER_MSN = 'MSN Browser'; // http://explorer.msn.com/
    const BROWSER_MSNBOT = 'MSN Bot'; // http://search.msn.com/msnbot.htm
    const BROWSER_BINGBOT = 'Bing Bot'; // http://en.wikipedia.org/wiki/Bingbot
    const BROWSER_VIVALDI = 'Vivaldi'; // https://vivaldi.com/
    const BROWSER_YANDEX = 'Yandex'; // https://browser.yandex.ua/

    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 BROWSER_PLAYSTATION = "PlayStation";
    const BROWSER_SAMSUNG = "SamsungBrowser";
    const BROWSER_SILK = "Silk";
    const BROWSER_I_FRAME = "Iframely";
    const BROWSER_COCOA = "CocoaRestClient";

    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_IPAD = 'iPad';
    const PLATFORM_BLACKBERRY = 'BlackBerry';
    const PLATFORM_NOKIA = 'Nokia';
    const PLATFORM_FREEBSD = 'FreeBSD';
    const PLATFORM_OPENBSD = 'OpenBSD';
    const PLATFORM_NETBSD = 'NetBSD';
    const PLATFORM_SUNOS = 'SunOS';
    const PLATFORM_OPENSOLARIS = 'OpenSolaris';
    const PLATFORM_ANDROID = 'Android';
    const PLATFORM_PLAYSTATION = "Sony PlayStation";
    const PLATFORM_ROKU = "Roku";
    const PLATFORM_APPLE_TV = "Apple TV";
    const PLATFORM_TERMINAL = "Terminal";
    const PLATFORM_FIRE_OS = "Fire OS";
    const PLATFORM_SMART_TV = "SMART-TV";
    const PLATFORM_CHROME_OS = "Chrome OS";
    const PLATFORM_JAVA_ANDROID = "Java/Android";
    const PLATFORM_POSTMAN = "Postman";
    const PLATFORM_I_FRAME = "Iframely";

    const OPERATING_SYSTEM_UNKNOWN = 'unknown';

    /**
     * Class constructor
     * @param string $userAgent
     */
    public function __construct($userAgent = '')
    {
        if ($userAgent != '') {
            $this->setUserAgent($userAgent);
        } else {
            $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_tablet = false;
        $this->_is_robot = false;
        $this->_is_facebook = false;
        $this->_aol_version = self::VERSION_UNKNOWN;
    }

    /**
     * Check to see if the specific browser is valid
     * @param string $browserName
     * @return bool True if the browser is the specified browser
     */
    function isBrowser($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 $browser string The name of the Browser
     */
    public function setBrowser($browser)
    {
        $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 string $platform The name of the Platform
     */
    public function setPlatform($platform)
    {
        $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 string $version The version of the Browser
     */
    public function setVersion($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 string $version The version of AOL
     */
    public function setAolVersion($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 tablet device?
     * @return boolean True if the browser is from a tablet device otherwise false
     */
    public function isTablet()
    {
        return $this->_is_tablet;
    }

    /**
     * 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;
    }

    /**
     * Is the browser from facebook?
     * @return boolean True if the browser is from facebook otherwise false
     */
    public function isFacebook()
    {
        return $this->_is_facebook;
    }

    /**
     * Set the browser to be from AOL
     * @param $isAol
     */
    public function setAol($isAol)
    {
        $this->_is_aol = $isAol;
    }

    /**
     * Set the Browser to be mobile
     * @param boolean $value is the browser a mobile browser or not
     */
    protected function setMobile($value = true)
    {
        $this->_is_mobile = $value;
    }

    /**
     * Set the Browser to be tablet
     * @param boolean $value is the browser a tablet browser or not
     */
    protected function setTablet($value = true)
    {
        $this->_is_tablet = $value;
    }

    /**
     * Set the Browser to be a robot
     * @param boolean $value is the browser a robot or not
     */
    protected function setRobot($value = true)
    {
        $this->_is_robot = $value;
    }

    /**
     * Set the Browser to be a Facebook request
     * @param boolean $value is the browser a robot or not
     */
    protected function setFacebook($value = true)
    {
        $this->_is_facebook = $value;
    }

    /**
     * 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 string $agent_string The value for the User Agent
     */
    public function setUserAgent($agent_string)
    {
        $this->reset();
        $this->_agent = $agent_string;
        $this->determine();
    }

    /**
     * Used to determine if the browser is actually "chromeframe"
     * @since 1.7
     * @return boolean True if the browser is using chromeframe
     */
    public function isChromeFrame()
    {
        return (strpos($this->_agent, "chromeframe") !== false);
    }

    /**
     * Returns a formatted string with a summary of the details of the browser.
     * @return string formatted string with a summary of the browser
     */
    public function __toString()
    {
        return "<strong>Browser Name:</strong> {$this->getBrowser()}<br/>\n" .
            "<strong>Browser Version:</strong> {$this->getVersion()}<br/>\n" .
            "<strong>Browser User Agent String:</strong> {$this->getUserAgent()}<br/>\n" .
            "<strong>Platform:</strong> {$this->getPlatform()}<br/>";
    }

    /**
     * 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 (
            // well-known, well-used
            // Special Notes:
            // (1) Opera must be checked before FireFox due to the odd
            //     user agents used in some older versions of Opera
            // (2) WebTV is strapped onto Internet Explorer so we must
            //     check for WebTV before IE
            // (3) (deprecated) Galeon is based on Firefox and needs to be
            //     tested before Firefox is tested
            // (4) OmniWeb is based on Safari so OmniWeb check must occur
            //     before Safari
            // (5) Netscape 9+ is based on Firefox so Netscape checks
            //     before FireFox are necessary
            // (6) Vivaldi is UA contains both Firefox and Chrome so Vivaldi checks
            //     before Firefox and Chrome
            $this->checkBrowserWebTv() ||
            $this->checkBrowserBrave() ||
            $this->checkBrowserUCBrowser() ||
            $this->checkBrowserEdge() ||
            $this->checkBrowserInternetExplorer() ||
            $this->checkBrowserOpera() ||
            $this->checkBrowserGaleon() ||
            $this->checkBrowserNetscapeNavigator9Plus() ||
            $this->checkBrowserVivaldi() ||
            $this->checkBrowserYandex() ||
            $this->checkBrowserPalemoon() ||
            $this->checkBrowserFirefox() ||
            $this->checkBrowserChrome() ||
            $this->checkBrowserOmniWeb() ||

            // common mobile
            $this->checkBrowserAndroid() ||
            $this->checkBrowseriPad() ||
            $this->checkBrowseriPod() ||
            $this->checkBrowseriPhone() ||
            $this->checkBrowserBlackBerry() ||
            $this->checkBrowserNokia() ||

            // common bots
            $this->checkBrowserGoogleBot() ||
            $this->checkBrowserMSNBot() ||
            $this->checkBrowserBingBot() ||
            $this->checkBrowserSlurp() ||

            // Yandex bots
            $this->checkBrowserYandexBot() ||
            $this->checkBrowserYandexImageResizerBot() ||
            $this->checkBrowserYandexBlogsBot() ||
            $this->checkBrowserYandexCatalogBot() ||
            $this->checkBrowserYandexDirectBot() ||
            $this->checkBrowserYandexFaviconsBot() ||
            $this->checkBrowserYandexImagesBot() ||
            $this->checkBrowserYandexMediaBot() ||
            $this->checkBrowserYandexMetrikaBot() ||
            $this->checkBrowserYandexNewsBot() ||
            $this->checkBrowserYandexVideoBot() ||
            $this->checkBrowserYandexWebmasterBot() ||

            // check for facebook external hit when loading URL
            $this->checkFacebookExternalHit() ||

            // WebKit base check (post mobile and others)
            $this->checkBrowserSamsung() ||
            $this->checkBrowserSilk() ||
            $this->checkBrowserSafari() ||

            // everyone else
            $this->checkBrowserNetPositive() ||
            $this->checkBrowserFirebird() ||
            $this->checkBrowserKonqueror() ||
            $this->checkBrowserIcab() ||
            $this->checkBrowserPhoenix() ||
            $this->checkBrowserAmaya() ||
            $this->checkBrowserLynx() ||
            $this->checkBrowserShiretoko() ||
            $this->checkBrowserIceCat() ||
            $this->checkBrowserIceweasel() ||
            $this->checkBrowserW3CValidator() ||
            $this->checkBrowserCurl() ||
            $this->checkBrowserWget() ||
            $this->checkBrowserPlayStation() ||
            $this->checkBrowserIframely() ||
            $this->checkBrowserCocoa() ||
            $this->checkBrowserMozilla() /* Mozilla is such an open standard that you must check it last */);
    }

    /**
     * Determine if the user is using a BlackBerry (last updated 1.7)
     * @return boolean True if the browser is the BlackBerry browser otherwise false
     */
    protected function checkBrowserBlackBerry()
    {
        if (stripos($this->_agent, 'blackberry') !== false) {
            $aresult = explode('/', stristr($this->_agent, "BlackBerry"));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion($aversion[0]);
                $this->_browser_name = self::BROWSER_BLACKBERRY;
                $this->setMobile(true);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the user is using an AOL User Agent (last updated 1.7)
     * @return boolean True if the browser is from AOL otherwise false
     */
    protected function checkForAol()
    {
        $this->setAol(false);
        $this->setAolVersion(self::VERSION_UNKNOWN);

        if (stripos($this->_agent, 'aol') !== false) {
            $aversion = explode(' ', stristr($this->_agent, 'AOL'));
            if (isset($aversion[1])) {
                $this->setAol(true);
                $this->setAolVersion(preg_replace('/[^0-9\.a-z]/i', '', $aversion[1]));
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is the GoogleBot or not (last updated 1.7)
     * @return boolean True if the browser is the GoogletBot otherwise false
     */
    protected function checkBrowserGoogleBot()
    {
        if (stripos($this->_agent, 'googlebot') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'googlebot'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion(str_replace(';', '', $aversion[0]));
                $this->_browser_name = self::BROWSER_GOOGLEBOT;
                $this->setRobot(true);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is the YandexBot or not
     * @return boolean True if the browser is the YandexBot otherwise false
     */
    protected function checkBrowserYandexBot()
    {
        if (stripos($this->_agent, 'YandexBot') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'YandexBot'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion(str_replace(';', '', $aversion[0]));
                $this->_browser_name = self::BROWSER_YANDEXBOT;
                $this->setRobot(true);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is the YandexImageResizer or not
     * @return boolean True if the browser is the YandexImageResizer otherwise false
     */
    protected function checkBrowserYandexImageResizerBot()
    {
        if (stripos($this->_agent, 'YandexImageResizer') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'YandexImageResizer'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion(str_replace(';', '', $aversion[0]));
                $this->_browser_name = self::BROWSER_YANDEXIMAGERESIZER_BOT;
                $this->setRobot(true);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is the YandexCatalog or not
     * @return boolean True if the browser is the YandexCatalog otherwise false
     */
    protected function checkBrowserYandexCatalogBot()
    {
        if (stripos($this->_agent, 'YandexCatalog') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'YandexCatalog'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion(str_replace(';', '', $aversion[0]));
                $this->_browser_name = self::BROWSER_YANDEXCATALOG_BOT;
                $this->setRobot(true);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is the YandexNews or not
     * @return boolean True if the browser is the YandexNews otherwise false
     */
    protected function checkBrowserYandexNewsBot()
    {
        if (stripos($this->_agent, 'YandexNews') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'YandexNews'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion(str_replace(';', '', $aversion[0]));
                $this->_browser_name = self::BROWSER_YANDEXNEWS_BOT;
                $this->setRobot(true);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is the YandexMetrika or not
     * @return boolean True if the browser is the YandexMetrika otherwise false
     */
    protected function checkBrowserYandexMetrikaBot()
    {
        if (stripos($this->_agent, 'YandexMetrika') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'YandexMetrika'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion(str_replace(';', '', $aversion[0]));
                $this->_browser_name = self::BROWSER_YANDEXMETRIKA_BOT;
                $this->setRobot(true);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is the YandexDirect or not
     * @return boolean True if the browser is the YandexDirect otherwise false
     */
    protected function checkBrowserYandexDirectBot()
    {
        if (stripos($this->_agent, 'YandexDirect') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'YandexDirect'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion(str_replace(';', '', $aversion[0]));
                $this->_browser_name = self::BROWSER_YANDEXDIRECT_BOT;
                $this->setRobot(true);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is the YandexWebmaster or not
     * @return boolean True if the browser is the YandexWebmaster otherwise false
     */
    protected function checkBrowserYandexWebmasterBot()
    {
        if (stripos($this->_agent, 'YandexWebmaster') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'YandexWebmaster'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion(str_replace(';', '', $aversion[0]));
                $this->_browser_name = self::BROWSER_YANDEXWEBMASTER_BOT;
                $this->setRobot(true);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is the YandexFavicons or not
     * @return boolean True if the browser is the YandexFavicons otherwise false
     */
    protected function checkBrowserYandexFaviconsBot()
    {
        if (stripos($this->_agent, 'YandexFavicons') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'YandexFavicons'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion(str_replace(';', '', $aversion[0]));
                $this->_browser_name = self::BROWSER_YANDEXFAVICONS_BOT;
                $this->setRobot(true);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is the YandexBlogs or not
     * @return boolean True if the browser is the YandexBlogs otherwise false
     */
    protected function checkBrowserYandexBlogsBot()
    {
        if (stripos($this->_agent, 'YandexBlogs') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'YandexBlogs'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion(str_replace(';', '', $aversion[0]));
                $this->_browser_name = self::BROWSER_YANDEXBLOGS_BOT;
                $this->setRobot(true);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is the YandexMedia or not
     * @return boolean True if the browser is the YandexMedia otherwise false
     */
    protected function checkBrowserYandexMediaBot()
    {
        if (stripos($this->_agent, 'YandexMedia') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'YandexMedia'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion(str_replace(';', '', $aversion[0]));
                $this->_browser_name = self::BROWSER_YANDEXMEDIA_BOT;
                $this->setRobot(true);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is the YandexVideo or not
     * @return boolean True if the browser is the YandexVideo otherwise false
     */
    protected function checkBrowserYandexVideoBot()
    {
        if (stripos($this->_agent, 'YandexVideo') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'YandexVideo'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion(str_replace(';', '', $aversion[0]));
                $this->_browser_name = self::BROWSER_YANDEXVIDEO_BOT;
                $this->setRobot(true);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is the YandexImages or not
     * @return boolean True if the browser is the YandexImages otherwise false
     */
    protected function checkBrowserYandexImagesBot()
    {
        if (stripos($this->_agent, 'YandexImages') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'YandexImages'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion(str_replace(';', '', $aversion[0]));
                $this->_browser_name = self::BROWSER_YANDEXIMAGES_BOT;
                $this->setRobot(true);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is the MSNBot or not (last updated 1.9)
     * @return boolean True if the browser is the MSNBot otherwise false
     */
    protected function checkBrowserMSNBot()
    {
        if (stripos($this->_agent, "msnbot") !== false) {
            $aresult = explode("/", stristr($this->_agent, "msnbot"));
            if (isset($aresult[1])) {
                $aversion = explode(" ", $aresult[1]);
                $this->setVersion(str_replace(";", '', $aversion[0]));
                $this->_browser_name = self::BROWSER_MSNBOT;
                $this->setRobot(true);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is the BingBot or not (last updated 1.9)
     * @return boolean True if the browser is the BingBot otherwise false
     */
    protected function checkBrowserBingBot()
    {
        if (stripos($this->_agent, "bingbot") !== false) {
            $aresult = explode("/", stristr($this->_agent, "bingbot"));
            if (isset($aresult[1])) {
                $aversion = explode(" ", $aresult[1]);
                $this->setVersion(str_replace(";", '', $aversion[0]));
                $this->_browser_name = self::BROWSER_BINGBOT;
                $this->setRobot(true);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is the W3C Validator or not (last updated 1.7)
     * @return boolean True if the browser is the W3C Validator otherwise false
     */
    protected function checkBrowserW3CValidator()
    {
        if (stripos($this->_agent, 'W3C-checklink') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'W3C-checklink'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion($aversion[0]);
                $this->_browser_name = self::BROWSER_W3CVALIDATOR;
                return true;
            }
        } else if (stripos($this->_agent, 'W3C_Validator') !== false) {
            // Some of the Validator versions do not delineate w/ a slash - add it back in
            $ua = str_replace("W3C_Validator ", "W3C_Validator/", $this->_agent);
            $aresult = explode('/', stristr($ua, 'W3C_Validator'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion($aversion[0]);
                $this->_browser_name = self::BROWSER_W3CVALIDATOR;
                return true;
            }
        } else if (stripos($this->_agent, 'W3C-mobileOK') !== false) {
            $this->_browser_name = self::BROWSER_W3CVALIDATOR;
            $this->setMobile(true);
            return true;
        }
        return false;
    }

    /**
     * Determine if the browser is the Yahoo! Slurp Robot or not (last updated 1.7)
     * @return boolean True if the browser is the Yahoo! Slurp Robot otherwise false
     */
    protected function checkBrowserSlurp()
    {
        if (stripos($this->_agent, 'slurp') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'Slurp'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion($aversion[0]);
                $this->_browser_name = self::BROWSER_SLURP;
                $this->setRobot(true);
                $this->setMobile(false);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is Brave or not
     * @return boolean True if the browser is Brave otherwise false
     */
    protected function checkBrowserBrave()
    {
        if (stripos($this->_agent, 'Brave/') !== false) {
            $aResult = explode('/', stristr($this->_agent, 'Brave'));
            if (isset($aResult[1])) {
                $aversion = explode(' ', $aResult[1]);
                $this->setVersion($aversion[0]);
                $this->setBrowser(self::BROWSER_BRAVE);
                return true;
            }
        } elseif (stripos($this->_agent, ' Brave ') !== false) {
            $this->setBrowser(self::BROWSER_BRAVE);
            // this version of the UA did not ship with a version marker
            // e.g. Mozilla/5.0 (Linux; Android 7.0; SM-G955F Build/NRD90M) AppleWebKit/537.36 (KHTML, like Gecko) Brave Chrome/68.0.3440.91 Mobile Safari/537.36
            $this->setVersion('');
            return true;
        }
        return false;
    }

    /**
     * Determine if the browser is Edge or not
     * @return boolean True if the browser is Edge otherwise false
     */
    protected function checkBrowserEdge()
    {
        if ($name = (stripos($this->_agent, 'Edge/') !== false ? 'Edge' : ((stripos($this->_agent, 'Edg/') !== false || stripos($this->_agent, 'EdgA/') !== false) ? 'Edg' : false))) {
            $aresult = explode('/', stristr($this->_agent, $name));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion($aversion[0]);
                $this->setBrowser(self::BROWSER_EDGE);
                if (stripos($this->_agent, 'Windows Phone') !== false || stripos($this->_agent, 'Android') !== false) {
                    $this->setMobile(true);
                }
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is Internet Explorer or not (last updated 1.7)
     * @return boolean True if the browser is Internet Explorer otherwise false
     */
    protected function checkBrowserInternetExplorer()
    {
        //  Test for IE11
        if (stripos($this->_agent, 'Trident/7.0; rv:11.0') !== false) {
            $this->setBrowser(self::BROWSER_IE);
            $this->setVersion('11.0');
            return true;
        } // Test for v1 - v1.5 IE
        else if (stripos($this->_agent, 'microsoft internet explorer') !== false) {
            $this->setBrowser(self::BROWSER_IE);
            $this->setVersion('1.0');
            $aresult = stristr($this->_agent, '/');
            if (preg_match('/308|425|426|474|0b1/i', $aresult)) {
                $this->setVersion('1.5');
            }
            return true;
        } // Test for versions > 1.5
        else if (stripos($this->_agent, 'msie') !== false && stripos($this->_agent, 'opera') === false) {
            // See if the browser is the odd MSN Explorer
            if (stripos($this->_agent, 'msnb') !== false) {
                $aresult = explode(' ', stristr(str_replace(';', '; ', $this->_agent), 'MSN'));
                if (isset($aresult[1])) {
                    $this->setBrowser(self::BROWSER_MSN);
                    $this->setVersion(str_replace(array('(', ')', ';'), '', $aresult[1]));
                    return true;
                }
            }
            $aresult = explode(' ', stristr(str_replace(';', '; ', $this->_agent), 'msie'));
            if (isset($aresult[1])) {
                $this->setBrowser(self::BROWSER_IE);
                $this->setVersion(str_replace(array('(', ')', ';'), '', $aresult[1]));
                if (stripos($this->_agent, 'IEMobile') !== false) {
                    $this->setBrowser(self::BROWSER_POCKET_IE);
                    $this->setMobile(true);
                }
                return true;
            }
        } // Test for versions > IE 10
        else if (stripos($this->_agent, 'trident') !== false) {
            $this->setBrowser(self::BROWSER_IE);
            $result = explode('rv:', $this->_agent);
            if (isset($result[1])) {
                $this->setVersion(preg_replace('/[^0-9.]+/', '', $result[1]));
                $this->_agent = str_replace(array("Mozilla", "Gecko"), "MSIE", $this->_agent);
            }
        } // Test for Pocket IE
        else if (stripos($this->_agent, 'mspie') !== false || stripos($this->_agent, 'pocket') !== false) {
            $aresult = explode(' ', stristr($this->_agent, 'mspie'));
            if (isset($aresult[1])) {
                $this->setPlatform(self::PLATFORM_WINDOWS_CE);
                $this->setBrowser(self::BROWSER_POCKET_IE);
                $this->setMobile(true);

                if (stripos($this->_agent, 'mspie') !== false) {
                    $this->setVersion($aresult[1]);
                } else {
                    $aversion = explode('/', $this->_agent);
                    if (isset($aversion[1])) {
                        $this->setVersion($aversion[1]);
                    }
                }
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is Opera or not (last updated 1.7)
     * @return boolean True if the browser is Opera otherwise false
     */
    protected function checkBrowserOpera()
    {
        if (stripos($this->_agent, 'opera mini') !== false) {
            $resultant = stristr($this->_agent, 'opera mini');
            if (preg_match('/\//', $resultant)) {
                $aresult = explode('/', $resultant);
                if (isset($aresult[1])) {
                    $aversion = explode(' ', $aresult[1]);
                    $this->setVersion($aversion[0]);
                }
            } else {
                $aversion = explode(' ', stristr($resultant, 'opera mini'));
                if (isset($aversion[1])) {
                    $this->setVersion($aversion[1]);
                }
            }
            $this->_browser_name = self::BROWSER_OPERA_MINI;
            $this->setMobile(true);
            return true;
        } else if (stripos($this->_agent, 'opera') !== false) {
            $resultant = stristr($this->_agent, 'opera');
            if (preg_match('/Version\/(1*.*)$/', $resultant, $matches)) {
                $this->setVersion($matches[1]);
            } else if (preg_match('/\//', $resultant)) {
                $aresult = explode('/', str_replace("(", " ", $resultant));
                if (isset($aresult[1])) {
                    $aversion = explode(' ', $aresult[1]);
                    $this->setVersion($aversion[0]);
                }
            } else {
                $aversion = explode(' ', stristr($resultant, 'opera'));
                $this->setVersion(isset($aversion[1]) ? $aversion[1] : '');
            }
            if (stripos($this->_agent, 'Opera Mobi') !== false) {
                $this->setMobile(true);
            }
            $this->_browser_name = self::BROWSER_OPERA;
            return true;
        } else if (stripos($this->_agent, 'OPR') !== false) {
            $resultant = stristr($this->_agent, 'OPR');
            if (preg_match('/\//', $resultant)) {
                $aresult = explode('/', str_replace("(", " ", $resultant));
                if (isset($aresult[1])) {
                    $aversion = explode(' ', $aresult[1]);
                    $this->setVersion($aversion[0]);
                }
            }
            if (stripos($this->_agent, 'Mobile') !== false) {
                $this->setMobile(true);
            }
            $this->_browser_name = self::BROWSER_OPERA;
            return true;
        }
        return false;
    }

    /**
     * Determine if the browser is Chrome or not (last updated 1.7)
     * @return boolean True if the browser is Chrome otherwise false
     */
    protected function checkBrowserChrome()
    {
        if (stripos($this->_agent, 'Chrome') !== false) {
            $aresult = preg_split('/[\/;]+/', stristr($this->_agent, 'Chrome'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion($aversion[0]);
                $this->setBrowser(self::BROWSER_CHROME);
                //Chrome on Android
                if (stripos($this->_agent, 'Android') !== false) {
                    if (stripos($this->_agent, 'Mobile') !== false) {
                        $this->setMobile(true);
                    } else {
                        $this->setTablet(true);
                    }
                }
                return true;
            }
        }
        return false;
    }


    /**
     * Determine if the browser is WebTv or not (last updated 1.7)
     * @return boolean True if the browser is WebTv otherwise false
     */
    protected function checkBrowserWebTv()
    {
        if (stripos($this->_agent, 'webtv') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'webtv'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion($aversion[0]);
                $this->setBrowser(self::BROWSER_WEBTV);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is NetPositive or not (last updated 1.7)
     * @return boolean True if the browser is NetPositive otherwise false
     */
    protected function checkBrowserNetPositive()
    {
        if (stripos($this->_agent, 'NetPositive') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'NetPositive'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion(str_replace(array('(', ')', ';'), '', $aversion[0]));
                $this->setBrowser(self::BROWSER_NETPOSITIVE);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is Galeon or not (last updated 1.7)
     * @return boolean True if the browser is Galeon otherwise false
     */
    protected function checkBrowserGaleon()
    {
        if (stripos($this->_agent, 'galeon') !== false) {
            $aresult = explode(' ', stristr($this->_agent, 'galeon'));
            $aversion = explode('/', $aresult[0]);
            if (isset($aversion[1])) {
                $this->setVersion($aversion[1]);
                $this->setBrowser(self::BROWSER_GALEON);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is Konqueror or not (last updated 1.7)
     * @return boolean True if the browser is Konqueror otherwise false
     */
    protected function checkBrowserKonqueror()
    {
        if (stripos($this->_agent, 'Konqueror') !== false) {
            $aresult = explode(' ', stristr($this->_agent, 'Konqueror'));
            $aversion = explode('/', $aresult[0]);
            if (isset($aversion[1])) {
                $this->setVersion($aversion[1]);
                $this->setBrowser(self::BROWSER_KONQUEROR);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is iCab or not (last updated 1.7)
     * @return boolean True if the browser is iCab otherwise false
     */
    protected function checkBrowserIcab()
    {
        if (stripos($this->_agent, 'icab') !== false) {
            $aversion = explode(' ', stristr(str_replace('/', ' ', $this->_agent), 'icab'));
            if (isset($aversion[1])) {
                $this->setVersion($aversion[1]);
                $this->setBrowser(self::BROWSER_ICAB);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is OmniWeb or not (last updated 1.7)
     * @return boolean True if the browser is OmniWeb otherwise false
     */
    protected function checkBrowserOmniWeb()
    {
        if (stripos($this->_agent, 'omniweb') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'omniweb'));
            $aversion = explode(' ', isset($aresult[1]) ? $aresult[1] : '');
            $this->setVersion($aversion[0]);
            $this->setBrowser(self::BROWSER_OMNIWEB);
            return true;
        }
        return false;
    }

    /**
     * Determine if the browser is Phoenix or not (last updated 1.7)
     * @return boolean True if the browser is Phoenix otherwise false
     */
    protected function checkBrowserPhoenix()
    {
        if (stripos($this->_agent, 'Phoenix') !== false) {
            $aversion = explode('/', stristr($this->_agent, 'Phoenix'));
            if (isset($aversion[1])) {
                $this->setVersion($aversion[1]);
                $this->setBrowser(self::BROWSER_PHOENIX);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is Firebird or not (last updated 1.7)
     * @return boolean True if the browser is Firebird otherwise false
     */
    protected function checkBrowserFirebird()
    {
        if (stripos($this->_agent, 'Firebird') !== false) {
            $aversion = explode('/', stristr($this->_agent, 'Firebird'));
            if (isset($aversion[1])) {
                $this->setVersion($aversion[1]);
                $this->setBrowser(self::BROWSER_FIREBIRD);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is Netscape Navigator 9+ or not (last updated 1.7)
     * NOTE: (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()
    {
        if (stripos($this->_agent, 'Firefox') !== false && preg_match('/Navigator\/([^ ]*)/i', $this->_agent, $matches)) {
            $this->setVersion($matches[1]);
            $this->setBrowser(self::BROWSER_NETSCAPE_NAVIGATOR);
            return true;
        } else if (stripos($this->_agent, 'Firefox') === false && preg_match('/Netscape6?\/([^ ]*)/i', $this->_agent, $matches)) {
            $this->setVersion($matches[1]);
            $this->setBrowser(self::BROWSER_NETSCAPE_NAVIGATOR);
            return true;
        }
        return false;
    }

    /**
     * Determine if the browser is Shiretoko or not (https://wiki.mozilla.org/Projects/shiretoko) (last updated 1.7)
     * @return boolean True if the browser is Shiretoko otherwise false
     */
    protected function checkBrowserShiretoko()
    {
        if (stripos($this->_agent, 'Mozilla') !== false && preg_match('/Shiretoko\/([^ ]*)/i', $this->_agent, $matches)) {
            $this->setVersion($matches[1]);
            $this->setBrowser(self::BROWSER_SHIRETOKO);
            return true;
        }
        return false;
    }

    /**
     * Determine if the browser is Ice Cat or not (http://en.wikipedia.org/wiki/GNU_IceCat) (last updated 1.7)
     * @return boolean True if the browser is Ice Cat otherwise false
     */
    protected function checkBrowserIceCat()
    {
        if (stripos($this->_agent, 'Mozilla') !== false && preg_match('/IceCat\/([^ ]*)/i', $this->_agent, $matches)) {
            $this->setVersion($matches[1]);
            $this->setBrowser(self::BROWSER_ICECAT);
            return true;
        }
        return false;
    }

    /**
     * Determine if the browser is Nokia or not (last updated 1.7)
     * @return boolean True if the browser is Nokia otherwise false
     */
    protected function checkBrowserNokia()
    {
        if (preg_match("/Nokia([^\/]+)\/([^ SP]+)/i", $this->_agent, $matches)) {
            $this->setVersion($matches[2]);
            if (stripos($this->_agent, 'Series60') !== false || strpos($this->_agent, 'S60') !== false) {
                $this->setBrowser(self::BROWSER_NOKIA_S60);
            } else {
                $this->setBrowser(self::BROWSER_NOKIA);
            }
            $this->setMobile(true);
            return true;
        }
        return false;
    }

    /**
     * Determine if the browser is Palemoon or not
     * @return boolean True if the browser is Palemoon otherwise false
     */
    protected function checkBrowserPalemoon()
    {
        if (stripos($this->_agent, 'safari') === false) {
            if (preg_match("/Palemoon[\/ \(]([^ ;\)]+)/i", $this->_agent, $matches)) {
                $this->setVersion($matches[1]);
                $this->setBrowser(self::BROWSER_PALEMOON);
                return true;
            } else if (preg_match("/Palemoon([0-9a-zA-Z\.]+)/i", $this->_agent, $matches)) {
                $this->setVersion($matches[1]);
                $this->setBrowser(self::BROWSER_PALEMOON);
                return true;
            } else if (preg_match("/Palemoon/i", $this->_agent, $matches)) {
                $this->setVersion('');
                $this->setBrowser(self::BROWSER_PALEMOON);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is UCBrowser or not
     * @return boolean True if the browser is UCBrowser otherwise false
     */
    protected function checkBrowserUCBrowser()
    {
        if (preg_match('/UC ?Browser\/?([\d\.]+)/', $this->_agent, $matches)) {
            if (isset($matches[1])) {
                $this->setVersion($matches[1]);
            }
            if (stripos($this->_agent, 'Mobile') !== false) {
                $this->setMobile(true);
            } else {
                $this->setTablet(true);
            }
            $this->setBrowser(self::BROWSER_UCBROWSER);
            return true;
        }
        return false;
    }

    /**
     * Determine if the browser is Firefox or not
     * @return boolean True if the browser is Firefox otherwise false
     */
    protected function checkBrowserFirefox()
    {
        if (stripos($this->_agent, 'safari') === false) {
            if (preg_match("/Firefox[\/ \(]([^ ;\)]+)/i", $this->_agent, $matches)) {
                $this->setVersion($matches[1]);
                $this->setBrowser(self::BROWSER_FIREFOX);
                //Firefox on Android
                if (stripos($this->_agent, 'Android') !== false || stripos($this->_agent, 'iPhone') !== false) {
                    if (stripos($this->_agent, 'Mobile') !== false || stripos($this->_agent, 'Tablet') !== false) {
                        $this->setMobile(true);
                    } else {
                        $this->setTablet(true);
                    }
                }
                return true;
            } else if (preg_match("/Firefox([0-9a-zA-Z\.]+)/i", $this->_agent, $matches)) {
                $this->setVersion($matches[1]);
                $this->setBrowser(self::BROWSER_FIREFOX);
                return true;
            } else if (preg_match("/Firefox$/i", $this->_agent, $matches)) {
                $this->setVersion('');
                $this->setBrowser(self::BROWSER_FIREFOX);
                return true;
            }
        } elseif (preg_match("/FxiOS[\/ \(]([^ ;\)]+)/i", $this->_agent, $matches)) {
            $this->setVersion($matches[1]);
            $this->setBrowser(self::BROWSER_FIREFOX);
            //Firefox on Android
            if (stripos($this->_agent, 'Android') !== false || stripos($this->_agent, 'iPhone') !== false) {
                if (stripos($this->_agent, 'Mobile') !== false || stripos($this->_agent, 'Tablet') !== false) {
                    $this->setMobile(true);
                } else {
                    $this->setTablet(true);
                }
            }
            return true;
        }
        return false;
    }

    /**
     * Determine if the browser is Firefox or not (last updated 1.7)
     * @return boolean True if the browser is Firefox otherwise false
     */
    protected function checkBrowserIceweasel()
    {
        if (stripos($this->_agent, 'Iceweasel') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'Iceweasel'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion($aversion[0]);
                $this->setBrowser(self::BROWSER_ICEWEASEL);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is Mozilla or not (last updated 1.7)
     * @return boolean True if the browser is Mozilla otherwise false
     */
    protected function checkBrowserMozilla()
    {
        if (stripos($this->_agent, 'mozilla') !== false && preg_match('/rv:[0-9].[0-9][a-b]?/i', $this->_agent) && stripos($this->_agent, 'netscape') === false) {
            $aversion = explode(' ', stristr($this->_agent, 'rv:'));
            preg_match('/rv:[0-9].[0-9][a-b]?/i', $this->_agent, $aversion);
            $this->setVersion(str_replace('rv:', '', $aversion[0]));
            $this->setBrowser(self::BROWSER_MOZILLA);
            return true;
        } else if (stripos($this->_agent, 'mozilla') !== false && preg_match('/rv:[0-9]\.[0-9]/i', $this->_agent) && stripos($this->_agent, 'netscape') === false) {
            $aversion = explode('', stristr($this->_agent, 'rv:'));
            $this->setVersion(str_replace('rv:', '', $aversion[0]));
            $this->setBrowser(self::BROWSER_MOZILLA);
            return true;
        } else if (stripos($this->_agent, 'mozilla') !== false && preg_match('/mozilla\/([^ ]*)/i', $this->_agent, $matches) && stripos($this->_agent, 'netscape') === false) {
            $this->setVersion($matches[1]);
            $this->setBrowser(self::BROWSER_MOZILLA);
            return true;
        }
        return false;
    }

    /**
     * Determine if the browser is Lynx or not (last updated 1.7)
     * @return boolean True if the browser is Lynx otherwise false
     */
    protected function checkBrowserLynx()
    {
        if (stripos($this->_agent, 'lynx') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'Lynx'));
            $aversion = explode(' ', (isset($aresult[1]) ? $aresult[1] : ''));
            $this->setVersion($aversion[0]);
            $this->setBrowser(self::BROWSER_LYNX);
            return true;
        }
        return false;
    }

    /**
     * Determine if the browser is Amaya or not (last updated 1.7)
     * @return boolean True if the browser is Amaya otherwise false
     */
    protected function checkBrowserAmaya()
    {
        if (stripos($this->_agent, 'amaya') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'Amaya'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion($aversion[0]);
                $this->setBrowser(self::BROWSER_AMAYA);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is Safari or not (last updated 1.7)
     * @return boolean True if the browser is Safari otherwise false
     */
    protected function checkBrowserSafari()
    {
        if (
            stripos($this->_agent, 'Safari') !== false
            && stripos($this->_agent, 'iPhone') === false
            && stripos($this->_agent, 'iPod') === false
        ) {

            $aresult = explode('/', stristr($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);
            return true;
        }
        return false;
    }

    protected function checkBrowserSamsung()
    {
        if (stripos($this->_agent, 'SamsungBrowser') !== false) {

            $aresult = explode('/', stristr($this->_agent, 'SamsungBrowser'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion($aversion[0]);
            } else {
                $this->setVersion(self::VERSION_UNKNOWN);
            }
            $this->setBrowser(self::BROWSER_SAMSUNG);
            return true;
        }
        return false;
    }

    protected function checkBrowserSilk()
    {
        if (stripos($this->_agent, 'Silk') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'Silk'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion($aversion[0]);
            } else {
                $this->setVersion(self::VERSION_UNKNOWN);
            }
            $this->setBrowser(self::BROWSER_SILK);
            return true;
        }
        return false;
    }

    protected function checkBrowserIframely()
    {
        if (stripos($this->_agent, 'Iframely') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'Iframely'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion($aversion[0]);
            } else {
                $this->setVersion(self::VERSION_UNKNOWN);
            }
            $this->setBrowser(self::BROWSER_I_FRAME);
            return true;
        }
        return false;
    }

    protected function checkBrowserCocoa()
    {
        if (stripos($this->_agent, 'CocoaRestClient') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'CocoaRestClient'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion($aversion[0]);
            } else {
                $this->setVersion(self::VERSION_UNKNOWN);
            }
            $this->setBrowser(self::BROWSER_COCOA);
            return true;
        }
        return false;
    }

    /**
     * Detect if URL is loaded from FacebookExternalHit
     * @return boolean True if it detects FacebookExternalHit otherwise false
     */
    protected function checkFacebookExternalHit()
    {
        if (stristr($this->_agent, 'FacebookExternalHit')) {
            $this->setRobot(true);
            $this->setFacebook(true);
            return true;
        }
        return false;
    }

    /**
     * Detect if URL is being loaded from internal Facebook browser
     * @return boolean True if it detects internal Facebook browser otherwise false
     */
    protected function checkForFacebookIos()
    {
        if (stristr($this->_agent, 'FBIOS')) {
            $this->setFacebook(true);
            return true;
        }
        return false;
    }

    /**
     * Detect Version for the Safari browser on iOS devices
     * @return boolean True if it detects the version correctly otherwise false
     */
    protected function getSafariVersionOnIos()
    {
        $aresult = explode('/', stristr($this->_agent, 'Version'));
        if (isset($aresult[1])) {
            $aversion = explode(' ', $aresult[1]);
            $this->setVersion($aversion[0]);
            return true;
        }
        return false;
    }

    /**
     * Detect Version for the Chrome browser on iOS devices
     * @return boolean True if it detects the version correctly otherwise false
     */
    protected function getChromeVersionOnIos()
    {
        $aresult = explode('/', stristr($this->_agent, 'CriOS'));
        if (isset($aresult[1])) {
            $aversion = explode(' ', $aresult[1]);
            $this->setVersion($aversion[0]);
            $this->setBrowser(self::BROWSER_CHROME);
            return true;
        }
        return false;
    }

    /**
     * Determine if the browser is iPhone or not (last updated 1.7)
     * @return boolean True if the browser is iPhone otherwise false
     */
    protected function checkBrowseriPhone()
    {
        if (stripos($this->_agent, 'iPhone') !== false) {
            $this->setVersion(self::VERSION_UNKNOWN);
            $this->setBrowser(self::BROWSER_IPHONE);
            $this->getSafariVersionOnIos();
            $this->getChromeVersionOnIos();
            $this->checkForFacebookIos();
            $this->setMobile(true);
            return true;
        }
        return false;
    }

    /**
     * Determine if the browser is iPad or not (last updated 1.7)
     * @return boolean True if the browser is iPad otherwise false
     */
    protected function checkBrowseriPad()
    {
        if (stripos($this->_agent, 'iPad') !== false) {
            $this->setVersion(self::VERSION_UNKNOWN);
            $this->setBrowser(self::BROWSER_IPAD);
            $this->getSafariVersionOnIos();
            $this->getChromeVersionOnIos();
            $this->checkForFacebookIos();
            $this->setTablet(true);
            return true;
        }
        return false;
    }

    /**
     * Determine if the browser is iPod or not (last updated 1.7)
     * @return boolean True if the browser is iPod otherwise false
     */
    protected function checkBrowseriPod()
    {
        if (stripos($this->_agent, 'iPod') !== false) {
            $this->setVersion(self::VERSION_UNKNOWN);
            $this->setBrowser(self::BROWSER_IPOD);
            $this->getSafariVersionOnIos();
            $this->getChromeVersionOnIos();
            $this->checkForFacebookIos();
            $this->setMobile(true);
            return true;
        }
        return false;
    }

    /**
     * Determine if the browser is Android or not (last updated 1.7)
     * @return boolean True if the browser is Android otherwise false
     */
    protected function checkBrowserAndroid()
    {
        if (stripos($this->_agent, 'Android') !== false) {
            $aresult = explode(' ', stristr($this->_agent, 'Android'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion($aversion[0]);
            } else {
                $this->setVersion(self::VERSION_UNKNOWN);
            }
            if (stripos($this->_agent, 'Mobile') !== false) {
                $this->setMobile(true);
            } else {
                $this->setTablet(true);
            }
            $this->setBrowser(self::BROWSER_ANDROID);
            return true;
        }
        return false;
    }

    /**
     * Determine if the browser is Vivaldi
     * @return boolean True if the browser is Vivaldi otherwise false
     */
    protected function checkBrowserVivaldi()
    {
        if (stripos($this->_agent, 'Vivaldi') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'Vivaldi'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion($aversion[0]);
                $this->setBrowser(self::BROWSER_VIVALDI);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is Yandex
     * @return boolean True if the browser is Yandex otherwise false
     */
    protected function checkBrowserYandex()
    {
        if (stripos($this->_agent, 'YaBrowser') !== false) {
            $aresult = explode('/', stristr($this->_agent, 'YaBrowser'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion($aversion[0]);
                $this->setBrowser(self::BROWSER_YANDEX);

                if (stripos($this->_agent, 'iPad') !== false) {
                    $this->setTablet(true);
                } elseif (stripos($this->_agent, 'Mobile') !== false) {
                    $this->setMobile(true);
                } elseif (stripos($this->_agent, 'Android') !== false) {
                    $this->setTablet(true);
                }

                return true;
            }
        }

        return false;
    }

    /**
     * Determine if the browser is a PlayStation
     * @return boolean True if the browser is PlayStation otherwise false
     */
    protected function checkBrowserPlayStation()
    {
        if (stripos($this->_agent, 'PlayStation ') !== false) {
            $aresult = explode(' ', stristr($this->_agent, 'PlayStation '));
            $this->setBrowser(self::BROWSER_PLAYSTATION);
            if (isset($aresult[0])) {
                $aversion = explode(')', $aresult[2]);
                $this->setVersion($aversion[0]);
                if (stripos($this->_agent, 'Portable)') !== false || stripos($this->_agent, 'Vita') !== false) {
                    $this->setMobile(true);
                }
                return true;
            }
        }
        return false;
    }

    /**
     * Determine if the browser is Wget or not (last updated 1.7)
     * @return boolean True if the browser is Wget otherwise false
     */
    protected function checkBrowserWget()
    {
        if (preg_match("!^Wget/([^ ]+)!i", $this->_agent, $aresult)) {
            $this->setVersion($aresult[1]);
            $this->setBrowser(self::BROWSER_WGET);
            return true;
        }
        return false;
    }
    /**
     * Determine if the browser is cURL or not (last updated 1.7)
     * @return boolean True if the browser is cURL otherwise false
     */
    protected function checkBrowserCurl()
    {
        if (strpos($this->_agent, 'curl') === 0) {
            $aresult = explode('/', stristr($this->_agent, 'curl'));
            if (isset($aresult[1])) {
                $aversion = explode(' ', $aresult[1]);
                $this->setVersion($aversion[0]);
                $this->setBrowser(self::BROWSER_CURL);
                return true;
            }
        }
        return false;
    }

    /**
     * Determine the user's platform (last updated 2.0)
     */
    protected function checkPlatform()
    {
        if (stripos($this->_agent, 'windows') !== false) {
            $this->_platform = self::PLATFORM_WINDOWS;
        } else if (stripos($this->_agent, 'iPad') !== false) {
            $this->_platform = self::PLATFORM_IPAD;
        } else if (stripos($this->_agent, 'iPod') !== false) {
            $this->_platform = self::PLATFORM_IPOD;
        } else if (stripos($this->_agent, 'iPhone') !== false) {
            $this->_platform = self::PLATFORM_IPHONE;
        } elseif (stripos($this->_agent, 'mac') !== false) {
            $this->_platform = self::PLATFORM_APPLE;
        } elseif (stripos($this->_agent, 'android') !== false) {
            $this->_platform = self::PLATFORM_ANDROID;
        } elseif (stripos($this->_agent, 'Silk') !== false) {
            $this->_platform = self::PLATFORM_FIRE_OS;
        } elseif (stripos($this->_agent, 'linux') !== false && stripos($this->_agent, 'SMART-TV') !== false) {
            $this->_platform = self::PLATFORM_LINUX . '/' . self::PLATFORM_SMART_TV;
        } elseif (stripos($this->_agent, 'linux') !== false) {
            $this->_platform = self::PLATFORM_LINUX;
        } else if (stripos($this->_agent, 'Nokia') !== false) {
            $this->_platform = self::PLATFORM_NOKIA;
        } else if (stripos($this->_agent, 'BlackBerry') !== false) {
            $this->_platform = self::PLATFORM_BLACKBERRY;
        } elseif (stripos($this->_agent, 'FreeBSD') !== false) {
            $this->_platform = self::PLATFORM_FREEBSD;
        } elseif (stripos($this->_agent, 'OpenBSD') !== false) {
            $this->_platform = self::PLATFORM_OPENBSD;
        } elseif (stripos($this->_agent, 'NetBSD') !== false) {
            $this->_platform = self::PLATFORM_NETBSD;
        } elseif (stripos($this->_agent, 'OpenSolaris') !== false) {
            $this->_platform = self::PLATFORM_OPENSOLARIS;
        } elseif (stripos($this->_agent, 'SunOS') !== false) {
            $this->_platform = self::PLATFORM_SUNOS;
        } elseif (stripos($this->_agent, 'OS\/2') !== false) {
            $this->_platform = self::PLATFORM_OS2;
        } elseif (stripos($this->_agent, 'BeOS') !== false) {
            $this->_platform = self::PLATFORM_BEOS;
        } elseif (stripos($this->_agent, 'win') !== false) {
            $this->_platform = self::PLATFORM_WINDOWS;
        } elseif (stripos($this->_agent, 'Playstation') !== false) {
            $this->_platform = self::PLATFORM_PLAYSTATION;
        } elseif (stripos($this->_agent, 'Roku') !== false) {
            $this->_platform = self::PLATFORM_ROKU;
        } elseif (stripos($this->_agent, 'iOS') !== false) {
            $this->_platform = self::PLATFORM_IPHONE . '/' . self::PLATFORM_IPAD;
        } elseif (stripos($this->_agent, 'tvOS') !== false) {
            $this->_platform = self::PLATFORM_APPLE_TV;
        } elseif (stripos($this->_agent, 'curl') !== false) {
            $this->_platform = self::PLATFORM_TERMINAL;
        } elseif (stripos($this->_agent, 'CrOS') !== false) {
            $this->_platform = self::PLATFORM_CHROME_OS;
        } elseif (stripos($this->_agent, 'okhttp') !== false) {
            $this->_platform = self::PLATFORM_JAVA_ANDROID;
        } elseif (stripos($this->_agent, 'PostmanRuntime') !== false) {
            $this->_platform = self::PLATFORM_POSTMAN;
        } elseif (stripos($this->_agent, 'Iframely') !== false) {
            $this->_platform = self::PLATFORM_I_FRAME;
        }
    }
}
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