Get Browser name, version and operating system name in php

Hello.

Recently I want to know about user's details. SO I use these code for geting browser name, version and operating system name.

Output: 

Browser Name: Google Chrome
Browser Version: 116.0.0.0
Operating System: Windows 10

Code:

$userAgent = $_SERVER['HTTP_USER_AGENT'];

function getBrowserVersion($userAgent, $browserName) {

    $pattern = "";

    switch ($browserName) {

        case "Internet Explorer":

            $pattern = '/MSIE|Trident\/.*rv:([\d\.]+)/';

            break;

        case "Mozilla Firefox":

            $pattern = '/Firefox\/([\d\.]+)/';

            break;

        case "Microsoft Edge":

            $pattern = '/Edge\/([\d\.]+)/';

            break;

        case "Google Chrome":

            $pattern = '/Chrome\/([\d\.]+)/';

            break;

        case "Apple Safari":

            $pattern = '/Version\/([\d\.]+)/';

            break;

        case "Opera":

            $pattern = '/Opera\/([\d\.]+)/';

            break;

    }

    if (preg_match($pattern, $userAgent, $matches)) {

        return $matches[1];

    }

    return "Unknown";

}

function getBrowserInfo($userAgent) {

    if (preg_match('/MSIE|Trident/i', $userAgent)) {

        return "Internet Explorer";

    } elseif (preg_match('/Firefox/i', $userAgent)) {

        return "Mozilla Firefox";

    } elseif (preg_match('/Edge/i', $userAgent)) {

        return "Microsoft Edge";

    } elseif (preg_match('/Chrome/i', $userAgent)) {

        return "Google Chrome";

    } elseif (preg_match('/Safari/i', $userAgent)) {

        return "Apple Safari";

    } elseif (preg_match('/Opera/i', $userAgent)) {

        return "Opera";

    }

    return "Unknown";

}

function getOperatingSystem($userAgent) {

    $os = "Unknown";

    if (preg_match('/Windows NT 10/i', $userAgent)) {

        $os = "Windows 10";

    } elseif (preg_match('/Windows NT 6.3/i', $userAgent)) {

        $os = "Windows 8.1";

    } elseif (preg_match('/Windows NT 6.2/i', $userAgent)) {

        $os = "Windows 8";

    } elseif (preg_match('/Windows NT 6.1/i', $userAgent)) {

        $os = "Windows 7";

    } elseif (preg_match('/Windows NT 6.0/i', $userAgent)) {

        $os = "Windows Vista";

    } elseif (preg_match('/Windows NT 5.1/i', $userAgent) || preg_match('/Windows XP/i', $userAgent)) {

        $os = "Windows XP";

    } elseif (preg_match('/Windows NT 5.0/i', $userAgent)) {

        $os = "Windows 2000";

    } elseif (preg_match('/Windows NT 4.0/i', $userAgent)) {

        $os = "Windows NT 4.0";

    } elseif (preg_match('/Macintosh|Mac OS X/i', $userAgent)) {

        $os = "Mac OS X";

    } elseif (preg_match('/Linux/i', $userAgent)) {

        $os = "Linux";

    } elseif (preg_match('/Unix/i', $userAgent)) {

        $os = "Unix";

    } elseif (preg_match('/Ubuntu/i', $userAgent)) {

        $os = "Ubuntu";

    }

    return $os;

}

$operatingSystem = getOperatingSystem($userAgent);

$browserName = getBrowserInfo($userAgent);

$browserVersion = getBrowserVersion($userAgent, $browserName);

echo "Browser Name: " . $browserName . "<br>";

echo "Browser Version: " . $browserVersion;

echo "<br>Operating System: " . $operatingSystem;