Browser::checkPlatform PHP Method

    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, '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;
                            }
                        }
                    }
                }
            }
        }
    }