php $_SERVER['HTTP_USER_AGENT'] 用法介绍-php手册-php.cn

Home

php教程

php手册

php $_SERVER['HTTP_USER_AGENT'] 用法介绍

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

Jun 13, 2016 am 10:16 AM

agenthttpphpserveruserintroduceexistyesuseusage

在php中HTTP_USER_AGENT是用来获取用户相关信息，包括了用户浏览器，操作系统工程，是否安装了alex toolbar条哦，等信息，有需要了解的朋友可参考。

1.用户访问服务器时,利用PHP的超级全局变量$_SERVER数组中字段['HTTP_USER_AGENT'] 获取访问用户的所有信息

代码如下	复制代码
echo $_SERVER['HTTP_USER_AGENT']; ?>

输出结果

Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; InfoPath.2; AskTbPTV/5.17.0.25589; Alexa Toolbar)

2.利用正则表达式匹配以上字符串,用户的浏览器操作系统信息

3.PHP根据匹配后的字符串(用户的浏览器操作系统信息),分配需要的CSS文件,JS等等…返回给用户

我的浏览器操作系统信息
Browser: Chrome 5.0

Platform: Windows 7

代码如下

复制代码

//显示访问用户的浏览器信息
echo 'Browser: ' . determinebrowser($Agent) . '
';
//显示访问用户的操作系统平台
echo 'Platform: ' . determineplatform($Agent). '
';

//正值表达式比对解析$_SERVER['HTTP_USER_AGENT']中的字符串获取访问用户的浏览器的信息
function determinebrowser ($Agent) {
$browseragent=""; //浏览器
$browserversion=""; //浏览器的版本
if (ereg('MSIE ([0-9].[0-9]{1,2})',$Agent,$version)) {
$browserversion=$version[1];
$browseragent="Internet Explorer";
} else if (ereg( 'Opera/([0-9]{1,2}.[0-9]{1,2})',$Agent,$version)) {
$browserversion=$version[1];
$browseragent="Opera";
} else if (ereg( 'Firefox/([0-9.]{1,5})',$Agent,$version)) {
$browserversion=$version[1];
$browseragent="Firefox";
}else if (ereg( 'Chrome/([0-9.]{1,3})',$Agent,$version)) {
$browserversion=$version[1];
$browseragent="Chrome";
}
else if (ereg( 'Safari/([0-9.]{1,3})',$Agent,$version)) {
$browseragent="Safari";
$browserversion="";
}
else {
$browserversion="";
$browseragent="Unknown";
}
return $browseragent." ".$browserversion;
}

// 同理获取访问用户的浏览器的信息
function determineplatform ($Agent) {
$browserplatform=='';
if (eregi('win',$Agent) && strpos($Agent, '95')) {
$browserplatform="Windows 95";
}
elseif (eregi('win 9x',$Agent) && strpos($Agent, '4.90')) {
$browserplatform="Windows ME";
}
elseif (eregi('win',$Agent) && ereg('98',$Agent)) {
$browserplatform="Windows 98";
}
elseif (eregi('win',$Agent) && eregi('nt 5.0',$Agent)) {
$browserplatform="Windows 2000";
}
elseif (eregi('win',$Agent) && eregi('nt 5.1',$Agent)) {
$browserplatform="Windows XP";
}
elseif (eregi('win',$Agent) && eregi('nt 6.0',$Agent)) {
$browserplatform="Windows Vista";
}
elseif (eregi('win',$Agent) && eregi('nt 6.1',$Agent)) {
$browserplatform="Windows 7";
}
elseif (eregi('win',$Agent) && ereg('32',$Agent)) {
$browserplatform="Windows 32";
}
elseif (eregi('win',$Agent) && eregi('nt',$Agent)) {
$browserplatform="Windows NT";
}elseif (eregi('Mac OS',$Agent)) {
$browserplatform="Mac OS";
}
elseif (eregi('linux',$Agent)) {
$browserplatform="Linux";
}
elseif (eregi('unix',$Agent)) {
$browserplatform="Unix";
}
elseif (eregi('sun',$Agent) && eregi('os',$Agent)) {
$browserplatform="SunOS";
}
elseif (eregi('ibm',$Agent) && eregi('os',$Agent)) {
$browserplatform="IBM OS/2";
}
elseif (eregi('Mac',$Agent) && eregi('PC',$Agent)) {
$browserplatform="Macintosh";
}
elseif (eregi('PowerPC',$Agent)) {
$browserplatform="PowerPC";
}
elseif (eregi('AIX',$Agent)) {
$browserplatform="AIX";
}
elseif (eregi('HPUX',$Agent)) {
$browserplatform="HPUX";
}
elseif (eregi('NetBSD',$Agent)) {
$browserplatform="NetBSD";
}
elseif (eregi('BSD',$Agent)) {
$browserplatform="BSD";
}
elseif (ereg('OSF1',$Agent)) {
$browserplatform="OSF1";
}
elseif (ereg('IRIX',$Agent)) {
$browserplatform="IRIX";
}
elseif (eregi('FreeBSD',$Agent)) {
$browserplatform="FreeBSD";
}
if ($browserplatform=='') {$browserplatform = "Unknown"; }
return $browserplatform;
}

判断浏览器语言的具体程序如下

代码如下

复制代码

$lang = substr($_SERVER['HTTP_ACCEPT_LANGUAGE'], 0, 4); //只取前4位，这样只判断最优先的语言。如果取前5位，可能出现en,zh的情况，影响判断。
if (preg_match("/zh-c/i", $lang))
echo "简体中文";
else if (preg_match("/zh/i", $lang))
echo "繁?中文";
else if (preg_match("/en/i", $lang))
echo "English";
else if (preg_match("/fr/i", $lang))
echo "French";
else if (preg_match("/de/i", $lang))
echo "German";
else if (preg_match("/jp/i", $lang))
echo "Japanese";
else if (preg_match("/ko/i", $lang))
echo "Korean";
else if (preg_match("/es/i", $lang))
echo "Spanish";
else if (preg_match("/sv/i", $lang))
echo "Swedish";
else echo $_SERVER["HTTP_ACCEPT_LANGUAGE"];
?>

判断浏览器类型主要是靠分析_SERVER["HTTP_USER_AGENT"]的内容，而分析浏览器语言则是分析_SERVER["HTTP_ACCEPT_LANGUAGE"]。

Statement

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn