php $_SERVER['HTTP_USER_AGENT'] 用法介绍
在php中HTTP_USER_AGENT是用来获取用户相关信息,包括了用户浏览器,操作系统工程,是否安装了alex toolbar条哦,等信息,有需要了解的朋友可参考.
1.用户访问服务器时,利用PHP的超级全局变量$_SERVER数组中字['HTTP_USER_AGENT'] 获取访问用户的所有信息
实例代码如下:
<?php echo $_SERVER['HTTP_USER_AGENT']; ?>
输出结果
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; InfoPath.2; AskTbPTV/5.17.0.25589; Alexa Toolbar)
2.利用正则表达式匹配以上字符串,用户的浏览器 操作系统信息
3.PHP根据匹配后的字符串(用户的浏览器 操作系统信息),分配需要的CSS文件,JS等等…返回给用户
我的浏览器 操作系统信息
Browser: Chrome 5.0
Platform: Windows 7
实例代码如下:
<?php //显示访问用户的浏览器信息 echo 'Browser: ' . determinebrowser($Agent) . '<BR>'; //显示访问用户的操作系统平台 echo 'Platform: ' . determineplatform($Agent) . '<BR>'; //正值表达式比对解析$_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,实例代码如下:
<?php $lang = substr($_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"].
教程链接:http://www.phprm.com/develop/fs1803.html
随意转载~但请保留教程地址★