Googlebot is shown as iPhone #29

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

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

        $this->checkBrowserWebTv() ||
        $this->checkBrowserInternetExplorer() ||
        $this->checkBrowserOpera() ||
        $this->checkBrowserGaleon() ||
        $this->checkBrowserNetscapeNavigator9Plus() ||
        $this->checkBrowserFirefox() ||
        $this->checkBrowserChrome() ||
        $this->checkBrowserOmniWeb() ||

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

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

        // WebKit base check (post mobile and others)
        $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->checkBrowserMozilla() /* Mozilla is such an open standard that you must check it last */
    );
}