Question

I have also added Chrome but removed it right now because it had no effect at all.
In MySQL where the information is stored it shows mozilla for Mozilla and for Chrome. Why? Does Chrome have his own code?

function getBrowserType () {
    if (!empty($_SERVER['HTTP_USER_AGENT']))
    {
       $HTTP_USER_AGENT = $_SERVER['HTTP_USER_AGENT'];
    }
    else if (!empty($HTTP_SERVER_VARS['HTTP_USER_AGENT']))
    {
       $HTTP_USER_AGENT = $HTTP_SERVER_VARS['HTTP_USER_AGENT'];
    }
    else if (!isset($HTTP_USER_AGENT))
    {
       $HTTP_USER_AGENT = '';
    }
    if (preg_match('/Opera(\/| )([0-9].[0-9]{1,2})/', $HTTP_USER_AGENT, $log_version))
    {
       $browser_version = $log_version[2];
       $browser_agent = 'opera';
    }
    else if (preg_match('/MSIE ([0-9].[0-9]{1,2})/', $HTTP_USER_AGENT, $log_version))
    {
       $browser_version = $log_version[1];
       $browser_agent = 'ie';
    }
    else if (preg_match('/OmniWeb\/([0-9].[0-9]{1,2})/', $HTTP_USER_AGENT, $log_version))
    {
       $browser_version = $log_version[1];
       $browser_agent = 'omniweb';
    }
    else if (preg_match('/Netscape([0-9]{1})/', $HTTP_USER_AGENT, $log_version))
    {
       $browser_version = $log_version[1];
       $browser_agent = 'netscape';
    }
    else if (preg_match('/Mozilla\/([0-9].[0-9]{1,2})/', $HTTP_USER_AGENT, $log_version))
    {
       $browser_version = $log_version[1];
       $browser_agent = 'mozilla';
    }
    else if (preg_match('/Konqueror\/([0-9].[0-9]{1,2})/', $HTTP_USER_AGENT, $log_version))
    {
       $browser_version = $log_version[1];
       $browser_agent = 'konqueror';
    }
    else
    {
       $browser_version = 0;
       $browser_agent = 'other';
    }
    return $browser_agent;
    }

Answer 1

http://php.net/manual/en/function.get-browser.php
This code I found here works great, tested it.

<?php
function getBrowser() 
{ 
    $u_agent = $_SERVER['HTTP_USER_AGENT']; 
    $bname = 'Unknown';
    $platform = 'Unknown';
    $version= "";

    //First get the platform?
    if (preg_match('/linux/i', $u_agent)) {
        $platform = 'linux';
    }
    elseif (preg_match('/macintosh|mac os x/i', $u_agent)) {
        $platform = 'mac';
    }
    elseif (preg_match('/windows|win32/i', $u_agent)) {
        $platform = 'windows';
    }

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

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

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

    return array(
        'userAgent' => $u_agent,
        'name'      => $bname,
        'version'   => $version,
        'platform'  => $platform,
        'pattern'    => $pattern
    );
} 

// now try it
$ua=getBrowser();
$yourbrowser= "Your browser: " . $ua['name'] . " " . $ua['version'] . " on " .$ua['platform'] . " reports: <br >" . $ua['userAgent'];
print_r($yourbrowser);
?>