php檢測useragent版本樣本

 這篇文章主要介紹了php檢測useragent版本的樣本,需要的朋友可以參考下

  代碼如下:<?phpdefine('IE', 1);define('FIREFOX', 2);define('CHROME', 3);define('OPERA', 4);class UserAgentDetect{    static $version = array();     static $userAgent = '';     static function getUserAgent()    {        $header = getallheaders();        self :: $userAgent = $header['User-Agent'];    }   function findUserAgentByKey($ua, $key)    {        $len = strlen($key);        $start = strpos($ua, $key);         $pos = strpos($ua, ' ', $start + $len + 1);         return substr($ua, $start + $len, $pos - $len - $start);    }     static function detectUserAgent()    {         self :: getUserAgent();         if (strpos(self :: $userAgent, 'MSIE') != null)        {            self :: $version[] = IE;            self :: $version[] =self:: findUserAgentByKey(self :: $userAgent, 'MSIE');        }         else if (strpos(self :: $userAgent, 'Gecko/') != null)        {             self :: $version[] = FIREFOX;            self :: $version[] =self::  findUserAgentByKey(self :: $userAgent, 'Firefox/');        }         else if (strpos(self :: $userAgent, 'AppleWebKit/') != null)        {            self :: $version[] = CHROME;            self :: $version[] = self:: findUserAgentByKey(self :: $userAgent, 'Chrome/');        }         else if (strpos(self :: $userAgent, 'Presto/') != null)        {            self :: $version[] = OPERA;            self :: $version[] = self:: findUserAgentByKey(self :: $userAgent, 'Opera/');        }         else        {        }          return self :: $version;    }       function matchUserAgent($ua, $key)    {        preg_match("/$key.([^s]*?)s/", $ua, $out);         return $out[1];    } } $ua=UserAgentDetect::detectUserAgent(); print_r($ua);