function getBrowserType（）为什么Chrome显示为Mozilla？

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;
    }

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);
?>

Many browsers have Mozilla/5.0 or something at the beginning of their user agents. So if you are going to detect browsers like that, there could be problem. You can however use this get_browser() function to do that for you. It is quite accurate and you won't have to bother yourself with so many regexes (which you will also need to keep updating )

http://php.net/manual/en/function.get-browser.php

It can be implemented like this:

<?php
$browser = get_browser($_SERVER['HTTP_USER_AGENT'], true);
if($browser['browser'] == 'Mozilla'){
    echo 'Mozilla';
}else if($browser['browser'] == 'Chrome'){
    echo 'Chrome';
}
?>