如何使用PHP或JavaScript检测浏览器？

Question

如何使用JavaScript或PHP检测用户是否未使用Chrome、Firefox或Internet Explorer浏览器？

- Web Worm

---

我想指出的是，只有在代理字符串没有被修改的情况下，了解浏览器才有用...不过我猜你已经知道了。 - jcolebrand

Answer 1

我发现在JS中做到这一点的最佳方法是在Quirksmode上。我为PHP制作了一个可以与常见浏览器一起使用的方法：

  $browser = array(
    'version'   => '0.0.0',
    'majorver'  => 0,
    'minorver'  => 0,
    'build'     => 0,
    'name'      => 'unknown',
    'useragent' => ''
  );

  $browsers = array(
    'firefox', 'msie', 'opera', 'chrome', 'safari', 'mozilla', 'seamonkey', 'konqueror', 'netscape',
    'gecko', 'navigator', 'mosaic', 'lynx', 'amaya', 'omniweb', 'avant', 'camino', 'flock', 'aol'
  );

  if (isset($_SERVER['HTTP_USER_AGENT'])) {
    $browser['useragent'] = $_SERVER['HTTP_USER_AGENT'];
    $user_agent = strtolower($browser['useragent']);
    foreach($browsers as $_browser) {
      if (preg_match("/($_browser)[\/ ]?([0-9.]*)/", $user_agent, $match)) {
        $browser['name'] = $match[1];
        $browser['version'] = $match[2];
        @list($browser['majorver'], $browser['minorver'], $browser['build']) = explode('.', $browser['version']);
        break;
      }
    }
  }

- Fabien Ménager

---

所以我查阅了一些资料，发现无论是 PHP 还是 JavaScript，它们都通过 HTTP 头部获取浏览器信息，就像 Apache 一样。如果我有错误，请纠正。 - Muhammad Umer

Answer 2

这里是JavaScript代码，通过它您可以轻松地检测浏览器。

    var userAgent = navigator.userAgent.toLowerCase();

    // Figure out what browser is being used.
    var Browser = {
        Version: (userAgent.match(/.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/) || [])[1],
        Chrome: /chrome/.test(userAgent),
        Safari: /webkit/.test(userAgent),
        Opera: /opera/.test(userAgent),
        IE: /msie/.test(userAgent) && !/opera/.test(userAgent),
        Mozilla: /mozilla/.test(userAgent) && !/(compatible|webkit)/.test(userAgent),
        Check: function() { alert(userAgent); }
    };

    if (Browser.Chrome || Browser.Mozilla) {
        // Do your stuff for Firefox and Chrome.
    }
    else if (Browser.IE) {
        // Do something related to Internet Explorer.
    }
    else {
        // The browser is Safari, Opera or some other.
    }

- Zain Shaikh

Answer 3

实际上，PHP中有一个函数可以做到这一点，get_browser。

- txyoji

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非常有趣，我不知道这个函数。谢谢你提供的信息。 - user103219

该函数需要 browsecap.ini 文件，这不是 PHP 的核心部分。 - Oz.

这是一个纯PHP版本的函数，它可以自动更新browsecap文件。http://code.google.com/p/phpbrowscap/ - txyoji

Answer 4

我完全能够使用get_browser()函数的PHP代码，这很好；）

<?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 separately 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);
?>

- mwafi

Answer 5

1) 99.9% 准确的检测器: BrowserDetection.php (示例)

2) 最简单的函数（但易受欺骗）:

<?php
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;
}
?>

- user2131877

Answer 6

在 JavaScript 中完成了这个类

function CSystemInfo(){
    var self = this;

    self.nScreenWidth = 0;
    self.nScreenHeight = 0;
    self.sPlatform = "Unknown";
    self.sBrowser = "Unknown";

    var init = function(){
        self.nScreenWidth = screen.width;
        self.nScreenHeight = screen.height;
        self.sPlatform = navigator.platform;
        self.sBrowser = getBrowser();
    }

    var getBrowser = function(){
        var userAgent = navigator.userAgent;
        var version = "UNKNOWN VERSION";

        if (userAgent.toLowerCase().indexOf('msie') > -1) {
            var ieversionreg = /(MSIE ([0-9]{1,2}\.[0-9]{1,2}))/;
            if(ieversionreg.test(userAgent)){
                version = ieversionreg.exec(userAgent)[2];
            }
            return 'Internet Explorer '+version;
        }
        else if (userAgent.toLowerCase().indexOf('firefox') > -1){
            var ffversionreg = /(Firefox\/(.+))/;
            if(ffversionreg.test(userAgent)){
                version = ffversionreg.exec(userAgent)[2];
            }
            return 'Firefox '+version;
        }
        else if (userAgent.toLowerCase().indexOf('chrome') > -1){
            var chromereg = /Chrome\/([0-9]{1,2})/;
            if(chromereg.test(userAgent)){
                version = chromereg.exec(userAgent)[1];
            }
            return 'Google Chrome '+version;
        }
        else return 'Unknown';
    }

    init();
}

通过调用实例化它

var oInfo = new CSystemInfo();
// Retrieve infos
oInfo.sBrowser; // Google Chrome 21

- ianaz

Answer 7

我在 PHP 中使用 浏览器检测 类。

- Digital Craft Studios

Answer 8

在PHP中，我使用$_SERVER['HTTP_USER_AGENT']值，并使用正则表达式或stristr进行攻击。

- Oz.

Answer 9

这可能是一种简单的方法来判断浏览器是否未使用IE、Chrome或FF。

if (navigator.userAgent.indexOf("Chrome") != -1)
    BName = "Chrome";
if (navigator.userAgent.indexOf("Firefox") != -1)
    BName = "Firefox";
if (navigator.userAgent.indexOf("MSIE") != -1)
    BName = "IE";

if(BName=='Chrome' || BName=='Firefox' || BName=='IE') 
    BName="Not other";
else BName="other";
alert(BName);

- vusan

Answer 10

用JavaScript实现最简单的方式是：

<script language="Javascript">
    location.href = 'URL_TO_FORWARD_TO';
</script>

在 location.href 中，你可以这样使用 PHP 变量：

<script language="Javascript">
    location.href = '<?php echo $_SERVER['QUERY_STRING']; ?>';
</script>

这将接受作为查询给定的URL到PHP脚本并转发到该URL。脚本将被调用如下：

http://your-server/path-to-script/script.php?URL_TO_FORWARD_TO

祝你好运。

- bng44270