<?php
$user_agent = $_SERVER['HTTP_USER_AGENT'];
function getOS()
{
    global $user_agent;
    $os_platform = "Unknown OS Platform";
    $os_array    = array(
        '/windows nt 10/i' => 'Windows 10',
        '/windows nt 6.3/i' => 'Windows 8.1',
        '/windows nt 6.2/i' => 'Windows 8',
        '/windows nt 6.1/i' => 'Windows 7',
        '/windows nt 6.0/i' => 'Windows Vista',
        '/windows nt 5.2/i' => 'Windows Server 2003/XP x64',
        '/windows nt 5.1/i' => 'Windows XP',
        '/windows xp/i' => 'Windows XP',
        '/windows nt 5.0/i' => 'Windows 2000',
        '/windows me/i' => 'Windows ME',
        '/win98/i' => 'Windows 98',
        '/win95/i' => 'Windows 95',
        '/win16/i' => 'Windows 3.11',
        '/macintosh|mac os x/i' => 'Mac OS X',
        '/mac_powerpc/i' => 'Mac OS 9',
        '/linux/i' => 'Linux',
        '/ubuntu/i' => 'Ubuntu',
        '/iphone/i' => 'iPhone',
        '/ipod/i' => 'iPod',
        '/ipad/i' => 'iPad',
        '/android/i' => 'Android',
        '/blackberry/i' => 'BlackBerry',
        '/webos/i' => 'Mobile'
    );
    foreach ($os_array as $regex => $value) {
        if (preg_match($regex, $user_agent)) {
            $os_platform = $value;
        }
    }
    return $os_platform;
}
function getBrowser()
{
    global $user_agent;
    $browser       = "Unknown Browser";
    $browser_array = array(
        '/msie/i' => 'Internet Explorer',
        '/firefox/i' => 'Firefox',
        '/safari/i' => 'Safari',
        '/chrome/i' => 'Chrome',
        '/opera/i' => 'Opera',
        '/netscape/i' => 'Netscape',
        '/maxthon/i' => 'Maxthon',
        '/konqueror/i' => 'Konqueror',
        '/mobile/i' => 'Handheld Browser'
    );
    foreach ($browser_array as $regex => $value) {
        if (preg_match($regex, $user_agent)) {
            $browser = $value;
        }
    }
    return $browser;
}
$user_os        = getOS();
$user_browser   = getBrowser();
$device_details = "" . $user_os . " - " . $user_browser . "";
##############################################################################################################################################################
?>