PHP analytics function

php-analytics.php

function getAnalytics() {
    $user = $_SERVER['HTTP_USER_AGENT'];
    $browser = 'Unknown';
    $platform = 'Unknown';
    $version= '';

    // First get the platform?
    if(preg_match('/linux/i', $user)) {
        $platform = 'Linux';
    }
    else if(preg_match('/macintosh|mac os x/i', $user)) {
        $platform = 'Mac';
    }
    else if(preg_match('/windows|win32/i', $user)) {
        $platform = 'Windows';
    }

    // Next get the name of the useragent yes seperately and for good reason
    if(preg_match('/MSIE/i', $user) && !preg_match('/Opera/i', $user)) {
        $browser = 'Internet Explorer';
        $browserName = "MSIE";
    }
    else if(preg_match('/Firefox/i', $user)) {
        $browser = 'Mozilla Firefox';
        $browserName = "Firefox";
    }
    else if(preg_match('/Chrome/i', $user)) {
        $browser = 'Google Chrome';
        $browserName = "Chrome";
    }
    else if(preg_match('/Safari/i', $user)) {
        $browser = 'Apple Safari';
        $browserName = "Safari";
    }
    else if(preg_match('/Opera/i', $user)) {
        $browser = 'Opera';
        $browserName = "Opera";
    }
    else if(preg_match('/Netscape/i', $user)) {
        $browser = 'Netscape';
        $browserName = "Netscape";
    }

    // Finally get the correct version number
    $known = array('Version', $browserName, 'other');
    $pattern = '#(?<browser>' . join('|', $known).')[/ ]+(?<version>[0-9.|a-zA-Z.]*)#';
    if(!preg_match_all($pattern, $user, $matches)) {
        // We have no matching number just continue
    }

    // see how many we have
    $i = count($matches['browser']);
    if($i != 1) {
        // We will have two since we are not using 'other' argument yet
        // See if version is before or after the name
        if(strripos($user,"Version") < strripos($user,$browserName)){
            $version= $matches['version'][0];
        }
        else {
            $version= $matches['version'][1];
        }
    }
    else {
        $version= $matches['version'][0];
    }

    // check if we have a number
    if($version == null || $version== '') {
        $version="?";
    }

    $user = array(
        'userAgent' => $user,
        'browserName' => $browser,
        'browserVersion' => $version,
        'platform' => $platform,
        'language' => $_SERVER['HTTP_ACCEPT_LANGUAGE'],
    );

    $protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) ? 'https' : 'http';
    $port = '';
    if($_SERVER['SERVER_PORT'] != '80') {
        $port = ':'.$_SERVER['SERVER_PORT'];
    }

    $url = $protocol.'://'.$_SERVER['SERVER_NAME'].$port.$_SERVER['REQUEST_URI'];

    return array(
        'server' => array(
            'ipAddress' => $_SERVER['SERVER_ADDR'],
            'software' => $_SERVER['SERVER_SOFTWARE'],
        ),
        'request' => array(
            'method' => $_SERVER['REQUEST_METHOD'],
            'protocol' => $protocol,
            'host' => $_SERVER['SERVER_NAME'],
            'port' => $_SERVER['SERVER_PORT'],
            'path' => $_SERVER['REQUEST_URI'],
            'queryString' => $_SERVER['QUERY_STRING'],
            'url' => $protocol.'://'.$_SERVER['SERVER_NAME'].$_SERVER['REQUEST_URI'],
            'referrer' => isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : null,
            'time' => $_SERVER['REQUEST_TIME'],
        ),
        'user' => $user,
    );
}

Thanks for making this :D