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get_browser

(PHP 4, PHP 5)

get_browser — 获取浏览器具有的功能

说明

mixed get_browser ([ string $user_agent [, bool $return_array = false ]] )

通过查找 browscap.ini 文件中的浏览器信息，尝试检测用户的浏览器所具有的功能。

参数

user_agent

要分析的用户代理。默认使用HTTP头中User-Agent的值，不过，你可以通过传递该参数改变User-Agent。(比如查找另一个浏览器的信息)

你可以传递一个 NULL 来忽略该参数。

return_array

如果设置为 TRUE ，该函数会返回一个 array ，而不是 object 。

返回值

信息会以包含一系列数据的数组或者对象返回。例如：浏览器的主版本号、次版本号和ID字符串；框架、JavaScript、cookies等功能是否支持 TRUE / FALSE 的值。

cookies 的值仅意味着浏览器是否具有接收cookies的功能，不代表用户是否已允许启用cookies。测试的唯一办法，只有通过 setcookie() 设置一个cookie，刷新页面并检测该cookie的值。

更新日志

版本	说明
4.3.2	添加了可选参数 `return_array`。

范例

Example #1 列出所有用户浏览器的信息

  <?php
 echo  $_SERVER [ 'HTTP_USER_AGENT' ] .  "\n\n" ;

 $browser  =  get_browser ( null ,  true );
 print_r ( $browser );
 ?>

以上例程的输出类似于：

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040803 Firefox/0.9.3Array
(
    [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
//browsers
define("UNKNOWN", 0);
define("TRIDENT", 1);
define("GECKO", 2);
define("PRESTO", 3);
define("WEBKIT", 4);
define("VALIDATOR", 5);
define("ROBOTS", 6);

if(!isset($_SESSION["info"]['browser'])) {
    $_SESSION["info"]['browser']['engine'] = UNKNOWN;
    $_SESSION["info"]['browser']['version'] = UNKNOWN;
    $_SESSION["info"]['browser']['platform'] = 'Unknown';

    $navigator_user_agent = ' ' . strtolower($_SERVER['HTTP_USER_AGENT']);

    if (strpos($navigator_user_agent, 'linux')) :
        $_SESSION["info"]['browser']['platform'] = 'Linux';
    elseif (strpos($navigator_user_agent, 'mac')) :
        $_SESSION["info"]['browser']['platform'] = 'Mac';
    elseif (strpos($navigator_user_agent, 'win')) :
        $_SESSION["info"]['browser']['platform'] = 'Windows';
    endif;

    if (strpos($navigator_user_agent, "trident")) {
        $_SESSION["info"]['browser']['engine'] = TRIDENT;
        $_SESSION["info"]['browser']['version'] = floatval(substr($navigator_user_agent, strpos($navigator_user_agent, "trident/") + 8, 3));
    }
    elseif (strpos($navigator_user_agent, "webkit")) {
        $_SESSION["info"]['browser']['engine'] = WEBKIT;
        $_SESSION["info"]['browser']['version'] = floatval(substr($navigator_user_agent, strpos($navigator_user_agent, "webkit/") + 7, 8));
    }
        elseif (strpos($navigator_user_agent, "presto")) {
        $_SESSION["info"]['browser']['engine'] = PRESTO;
        $_SESSION["info"]['browser']['version'] = floatval(substr($navigator_user_agent, strpos($navigator_user_agent, "presto/") + 6, 7));
    }
    elseif (strpos($navigator_user_agent, "gecko")) {
        $_SESSION["info"]['browser']['engine'] = GECKO;
        $_SESSION["info"]['browser']['version'] = floatval(substr($navigator_user_agent, strpos($navigator_user_agent, "gecko/") + 6, 9));
    }
    elseif (strpos($navigator_user_agent, "robot"))
        $_SESSION["info"]['browser']['engine'] = ROBOTS;
    elseif (strpos($navigator_user_agent, "spider"))
        $_SESSION["info"]['browser']['engine'] = ROBOTS;
    elseif (strpos($navigator_user_agent, "bot"))
        $_SESSION["info"]['browser']['engine'] = ROBOTS;
    elseif (strpos($navigator_user_agent, "crawl"))
        $_SESSION["info"]['browser']['engine'] = ROBOTS;
    elseif (strpos($navigator_user_agent, "search"))
        $_SESSION["info"]['browser']['engine'] = ROBOTS;
    elseif (strpos($navigator_user_agent, "w3c_validator")) 
        $_SESSION["info"]['browser']['engine'] = VALIDATOR;
    elseif (strpos($navigator_user_agent, "jigsaw"))
        $_SESSION["info"]['browser']['engine'] = VALIDATOR;

echo "<pre>\n\nEngine detected: ".$_SESSION["info"]['browser']['engine'];
switch($_SESSION["info"]['browser']['engine']) {
    case UNKNOWN: echo " (unknown)";
    break;
    case TRIDENT: echo " (trident)";
    break;
    case GECKO: echo " (gecko)";
    break;
    case PRESTO: echo " (presto)";
    break;
    case WEBKIT: echo " (Webkit)";
    break;
    case VALIDATOR: echo " (validator)";
    break;
    case ROBOTS: echo " (robot)";
}
echo "\nEngine version: ".$_SESSION["info"]['browser']['version'];
echo "\nPlataform detected: ".$_SESSION["info"]['browser']['platform'];
echo " \n\n</pre>";
?>




PD: you can add more engines and use an array, I just removed that and put the most popular engines as example, and used elseif instead, this code maybe have errors because is just an example.

[#10] Anonymous [2011-07-11 06:52:06]

For those of you using this function to target MSIE, a better idea maybe to use MSIE specific conditional comments. More info: <http://msdn.microsoft.com/en-us/library/ms537512%28VS.85%29.aspx>.

For example to indicate your disregard for users of MSIE 6 or earlier:

[#11] Simeon [2010-12-09 05:27:43]

This code is for placing a box in the corner of IE user's page warning of the disregard the web-designer has for the website's appearance in IE.  Call the box with ie_box(). Style and position the box how you want using the iebox css class.

<?php function using_ie() {     $u_agent = $_SERVER['HTTP_USER_AGENT'];     $ub = False;     if(preg_match('/MSIE/i',$u_agent))     {         $ub = True;     }          return $ub; } function ie_box() {     if (using_ie()) {         ?>
<div class="iebox">
This page is not designed for Intenet Explorer.  If you want to see this webpage as intended, please use a standards compliant browser, such as <a href="http://www.google.com/chrome">Google Chrome</a>.
</div>
<?php     return;     } } ?>

[#12] ruudrp at live dot nl [2010-11-28 03:31:28]

To my surprise I found that none of the get_browser alternatives output the correct name / version combination that I was looking for using Opera or Chrome. They either give the wrong name eg Safari when in fact it should be Chrome and if the ua string includes a version number as with the latest versions of Chrome and Opera the wrong number is reported. So I took bits and pieces from the various examples and combined them and added a check for version.

<?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); ?>

[#13] henda dot exe at gmail dot com [2010-08-15 21:27:42]

Just a warning to anybody using the preg_match function to determine what browser the viewer is using. I found with google chrome the array contains the following entries;
(Windows; U; Windows NT 6.1; en-US) AppleWebKit/533.4 (KHTML, like Gecko) Chrome/5.0.375.126 Safari/533.4

As I was using preg_match('/Chrome/i',$u_agent)) and preg_match('/Safari/i',$u_agent)) i found my script was reporting browsers as safari when infact the browser in use was google chrome.

[#14] Becheru Petru-Ioan [2010-04-04 15:39:54]

IE has a nasty bug called the Peekaboo bug that affected my website. I found that printing a '_' before the html tag of the webpage gets rid of this nasty bug. Using code inspirated by comment bellow here is the code that detects if a visitor is using internet explorer:

<?php $known = array('msie', 'firefox', 'safari', 'webkit', 'opera', 'netscape', 'konqueror', 'gecko'); preg_match_all( '#(?<browser>' . join('|', $known) . ')[/ ]+(?<version>[0-9]+(?:\.[0-9]+)?)#', strtolower( $_SERVER[ 'HTTP_USER_AGENT ' ]), $browser ); if($browser['browser'][0]=='msie') print('_'); ?>

[#15] Brinley Ang [2010-04-02 07:38:47]

This is the latest format of the array returned from this call

Array
{
[browser_name_regex] => ^mozilla/5\.0 (x11; .*; .*linux.*; .*; rv:1\.9\..*) gecko/.* firefox/3\.5.*$
[browser_name_pattern] => Mozilla/5.0 (X11; *; *Linux*; *; rv:1.9.*) Gecko

// Various browser tests you can do with the returned array ...
if ($ua['firefox']) ... // true
if ($ua['firefox'] > 3) ... // true
if ($ua['firefox'] > 4) ... // false
if ($ua['browser'] == 'firefox') ... // true
if ($ua['version'] > 3.5) ... // true
if ($ua['msie']) ... // false ('msie' key not defined)
if ($ua['opera'] > 3) ... // false ('opera' key not defined)
if ($ua['safari'] < 3) ... // false also ('safari' key not defined)
?>

[#17] Steve Perkins [2009-06-21 16:11:26]

This is a simple class to detect the client browser and version using regular expressions.

<?PHP class Browser { private $props = array("Version" => "0.0.0", "Name" => "unknown", "Agent" => "unknown") ; public function __Construct() { $browsers = array("firefox", "msie", "opera", "chrome", "safari", "mozilla", "seamonkey", "konqueror", "netscape", "gecko", "navigator", "mosaic", "lynx", "amaya", "omniweb", "avant", "camino", "flock", "aol"); $this->Agent = strtolower($_SERVER['HTTP_USER_AGENT']); foreach($browsers as $browser) { if (preg_match("#($browser)[/ ]?([0-9.]*)#", $this->Agent, $match)) { $this->Name = $match[1] ; $this->Version = $match[2] ; break ; } } } public function __Get($name) { if (!array_key_exists($name, $this->props)) { die "No such property or function $name)" ; } return $this->props[$name] ; } public function __Set($name, $val) { if (!array_key_exists($name, $this->props)) { SimpleError("No such property or function.", "Failed to set $name", $this->props) ; die ; } $this->props[$name] = $val ; } } ?>

example code
<?PHP $browser = new Browser ; echo "$Browser->Name $Browser->Version" ; ?>
result when client using Firefox 3.0.11
firefox 3.0.11

result when client using unknown browser
unknown 0.0.0

etc etc

[#18] Steve Perkins [2009-06-21 09:42:30]

This is a simple class to detect the client browser and version using regular expressions.

<?PHP class Browser extends BaseObjects_PropertyArray { private $props = array("Version" => "0.0.0", "Name" => "unknown", "Agent" => "unknown", "AllowsHeaderRedirect" => true) ; public function __Construct() { $browsers = array("firefox", "msie", "opera", "chrome", "safari", "mozilla", "seamonkey", "konqueror", "netscape", "gecko", "navigator", "mosaic", "lynx", "amaya", "omniweb", "avant", "camino", "flock", "aol"); $this->Agent = strtolower($_SERVER['HTTP_USER_AGENT']); foreach($browsers as $browser) { if (preg_match("#($browser)[/ ]?([0-9.]*)#", $this->Agent, $match)) { $this->Name = $match[1] ; $this->Version = $match[2] ; break ; } } $this->AllowsHeaderRedirect = !($this->Name == "msie" && $this->Version < 7) ; } public function __Get($name) { if (!array_key_exists($name, $this->props)) { die "No such property or function $name)" ; } return $this->props[$name] ; } } ?>

example code
<?PHP $browser = new Browser ; echo "$Browser->Name $Browser->Version" ; ?>
result when client using Firefox 3.0.11
firefox 3.0.11

result when client using unknown browser
unknown 0.0.0

etc etc

[#19] Mattkun Koder [2009-04-28 07:00:00]

If you want to use: ceo /a/ mmg5 /./ com 's improved version and STILL detect Google Chrome you need to move CHROME earlier on the list Before Safari otherwise it will be detected as safari.

$browser_list = 'msie firefox chrome konqueror safari netscape navigator opera mosaic lynx amaya omniweb avant camino flock seamonkey aol mozilla gecko';

[#20] assadvirgo at gmail dot com [2009-02-13 04:40:04]

This is a very useful function to get user browser. A great utility function for those are fed up of get_browser() issues :)

<?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; } ?>

[#21] jesdisciple [at] gmail -dawt- com [2007-11-19 08:13:01]

Use this to ensure that the costly call in its standard form never needs to be repeated:
<?php function getBrowser(){ static $browser;//No accident can arise from depending on an unset variable. if(!isset($browser)){ $browser = get_browser($_SERVER['HTTP_USER_AGENT']); } return $browser; } ?>

[#22] Steffen [2007-10-19 03:59:04]

Keep in mind that get_browser(); really slows down your application. It takes about 22 ms to execute on an idle server with Ubuntu Linux, Apache 2, PHP 5.1.3.

[#23] digibrisk at gmail dot NOSPAM dot SPAMNO dot com [2007-10-06 05:20:47]

If the "browscap" directive isn't set in your server's php.ini, then an error warning is shown. Just in case, you could make a call to ini_get() to check if the browscap directive is set before using browser_get().

<?php if(ini_get("browscap")) { $browser = get_browse(null, true); } ?>

[#24] mike at mike-griffiths dot co dot uk [2007-07-23 02:41:10]

You should not rely on just this for cross-browser compatibility issues. Good practice would be to include HTML if-statements for IE stylesheets as well as dynamically checking the browser type.

[#25] ansar dot ahmed at impelsys dot com [2007-03-22 02:01:19]

We are using get_browser() function for useragent Mozilla/4.0 (compatible; MSIE 4.01; Windows NT) the get_browser function is returning as Default Browser and Platform = unknown.

So i added this to my browscap.ini manually:

[Mozilla/4.0 (compatible; MSIE 4.01; Windows NT)]
Parent=IE 4.01
Platform=WinNT

[#26] sam [2006-10-22 15:09:53]

I thought this function might be useful to those without access to the php.ini file (such as those on a shared hosting system):

<?php function php_get_browser($agent = NULL){ $agent=$agent?$agent:$_SERVER['HTTP_USER_AGENT']; $yu=array(); $q_s=array("#\.#","#\*#","#\?#"); $q_r=array("\.",".*",".?"); $brows=parse_ini_file("php_browscap.ini",true); foreach($brows as $k=>$t){ if(fnmatch($k,$agent)){ $yu['browser_name_pattern']=$k; $pat=preg_replace($q_s,$q_r,$k); $yu['browser_name_regex']=strtolower("^$pat$"); foreach($brows as $g=>$r){ if($t['Parent']==$g){ foreach($brows as $a=>$b){ if($r['Parent']==$a){ $yu=array_merge($yu,$b,$r,$t); foreach($yu as $d=>$z){ $l=strtolower($d); $hu[$l]=$z; } } } } } break; } } return $hu; } ?>

define the location of php_browscap.ini wherever you want
always returns an array, same functionality as get_browser(NULL,true)
Hope someone finds it useful!

[#27] adspeed.com [2005-09-02 10:06:48]

Here is what we do to fix the parsing error messages for php_browscap.ini downloaded from Gary's website.

<?php // fix the browsecap.ini for php $v= file_get_contents('php_browscap.ini'); $v= preg_replace("/\r/","",$v); $v= preg_replace('/="(.*)"/i','=\\1',$v); $v= preg_replace("/platform=(.*)/i","platform=\"\\1\"",$v); $v= preg_replace("/parent=(.*)/i","parent=\"\\1\"",$v); $v= preg_replace("/minorver=(.*)/i","minorver=\"\\1\"",$v); $v= preg_replace("/majorver=(.*)/i","majorver=\"\\1\"",$v); $v= preg_replace("/version=(.*)/i","version=\"\\1\"",$v); $v= preg_replace("/browser=(.*)/i","browser=\"\\1\"",$v); $v= str_replace("[*]","*",$v); file_put_contents('browscap.ini',$v); ?>

[#28] max at phpexpert dot de [2004-03-26 07:14:42]

Be aware of the fact that this function shows what a specific browser might be able to show, but NOT what the user has turned on/off.

So maybe this function tells you that the browser is abel to to javascript even when javascript is turned off by the user.

[#29] bishop [2003-08-05 11:46:53]

PHP is sensitive to characters outside the range [ A-Za-z0-9_] as values in .ini files.  For example

browser=Opera (Bork Version)

causes PHP to complain, as it doesn't like the parentheses.

If you place quotation marks around the values for all keys in the browscap.ini file, you'll save yourself parsing problems.  Do this in eg vi with %s/=$.*$/="\1"/g

You could of course use PHP itself to fixup the file.  Exercise left to the reader.

[#30] verx at implix dot com [2002-12-09 02:57:39]

Please keep in mind that you should somehow (for example in session) cache the required results of get_browser() because it really slows thinks down.

We have experienced that without querying for browser data our scripts would run 120-130% faster. the explanation is that over 200kb long file (browscap.ini) has to be loaded and parsed everytime someone access any page (we need browser results on all pages).

So keep results in session and expect a performance boost.

[#31] les at hazlewood dot com [2001-09-03 18:57:19]

phpSniff (noted in a few places above) is absolutely fantastic. I just installed it, and it is a godsend! It now handles all of my session information needed to go in my database. Thanks for you folks who posted that great Sourceforge resource! http://phpsniff.sourceforge.net/

[#32] nick at category4 dot com [2001-06-12 16:21:24]

Here's a quick way to test for a Netscape browser. IE and Konqueror and several others call themselves "Mozilla", but they always qualify it with the word "compatible."

$isns = stristr($HTTP_USER_AGENT, "Mozilla") && (!(stristr($HTTP_USER_AGENT, "compatible")));

[#33] triad at df dot lth dot se [2000-07-30 16:17:44]

The only way browscap examines the target browser is through the HTTP_USER_AGENT so there is no way you can determine installed plug-ins. The only way to do that is through client-side JavaScripts.