Question

如何使用PHP获取浏览器名称？我觉得这会很简单吗？我需要做的只是区分IE和Firefox。

Answer 1

if (strpos($_SERVER['HTTP_USER_AGENT'], '(compatible; MSIE ')!==FALSE) {
    ...ie specific...
}

但是！ 不要！

很少有理由在服务器端嗅探用户代理。它带来了一系列问题，包括：

浏览器和其他用户代理，它们是谁，或者完全剥离用户代理标头，或者通常很难区分真正的浏览器与标题文本的区别。例如，上面的规则也将检测Opera欺骗IE和IEMobile（Windows Mobile），您可能会或可能不想要它，因为它是一个非常不同的桌面IE浏览器。
如果您在服务器端区分用户代理，则必须在响应中返回Vary: User-Agent标头，否则代理可以缓存页面版本并将其返回给其他浏览器不匹配。但是，包含此标题会产生在IE中搞乱缓存的副作用。

根据您尝试实现的目标，使用CSS hacks，JScript或conditional comments几乎总能有更好的方法来处理客户端IE和其他浏览器之间的差异。在您的情况下尝试检测IE的真正目的是什么？

Answer 2

试试这段代码......

<?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'];
echo $yourbrowser;

?>

Firefox的输出

Mozilla Firefox

Answer 3

$ _ SERVER [ 'HTTP_USER_AGENT']

Answer 4

<?php
var_dump($_SERVER['HTTP_USER_AGENT']);
var_dump(get_browser(null, true));
?>

打印：

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040803 Firefox/0.9.3

Array
(
    [browser_name_regex] => ^mozilla/5\.0 (windows; .; windows nt 5\.1; .*rv:.*) gecko/.* firefox/0\.9.*$
    [browser_name_pattern] => Mozilla/5.0 (Windows; ?; Windows NT 5.1; *rv:*) Gecko/* Firefox/0.9*
    [parent] => Firefox 0.9
    [platform] => WinXP
    [browser] => Firefox
    [version] => 0.9
    [majorver] => 0
    [minorver] => 9
    [cssversion] => 2
    [frames] => 1
    [iframes] => 1
    [tables] => 1
    [cookies] => 1
    [backgroundsounds] =>
    [vbscript] =>
    [javascript] => 1
    [javaapplets] => 1
    [activexcontrols] =>
    [cdf] =>
    [aol] =>
    [beta] => 1
    [win16] =>
    [crawler] =>
    [stripper] =>
    [wap] =>
    [netclr] =>
)

Answer 5

1）准确的探测器：BrowserDetection.php（Examples）

2）原始功能：

function get_user_browser()
{
    $u_agent = $_SERVER['HTTP_USER_AGENT'];        $ub = '';
    if(preg_match('/MSIE/i',$u_agent))          {   $ub = "ie";     }
    elseif(preg_match('/Firefox/i',$u_agent))   {   $ub = "firefox";    }
    elseif(preg_match('/Safari/i',$u_agent))    {   $ub = "safari"; }
    elseif(preg_match('/Chrome/i',$u_agent))    {   $ub = "chrome"; }
    elseif(preg_match('/Flock/i',$u_agent)) {   $ub = "flock";      }
    elseif(preg_match('/Opera/i',$u_agent)) {   $ub = "opera";      }
    return $ub;
}

PHP：获取浏览器名称

5 个答案: