PHP Test useragent Version sample

  This article mainly introduces the PHP detection useragent version of the example, the need for friends can refer to the following

    Code as follows: <?php define (' IE ', 1); Define (' FIREFOX ', 2); Define (' CHROME ', 3); Define (' OPERA ', 4); Class Useragentdetect {    static $version = Array ()       static $userAgent = ';   &nbsp ;   static function getuseragent ()    :         $header = Getallheaders ();         Self:: $userAgent = $header [' user-agent '];    }    function Finduseragentbykey ($ua, $key)     {        $len = str Len ($key);         $start = Strpos ($ua, $key);           $pos = Strpos ($ua, ', $start + $len + 1);           return substr ($ua, $start + $len, $pos-$len-$start);    }      static function detectuseragent ()     {         se LF:: Getuseragent ();           if (Strpos (self:: $userAgent, ' MSIE ')!= null)         {            self:: $version [] = IE;       &NB Sp     Self:: $version [] =self:: Finduseragentbykey (self:: $userAgent, ' msie ');        }          ELSE if (Strpos (self:: $userAgent, ' gecko/')!= null &NB Sp       {     ,         self:: $version [] = FIREFOX             Self:: $version [] =self::  finduseragentbykey (self:: $userAgent, ' firefox/');        }          ELSE if Strpos (self:: $userAgent, ' applewebkit/')!= nul L)         {            self:: $version [] = CHROME;     &NBS P       Self:: $version [] = self:: Finduseragentbykey (self:: $userAgent, ' chrome/');        }          ELSE if (Strpos (selF:: $userAgent, ' presto/')!= null)         {            self:: $vers Ion[] = OPERA;             self:: $version [] = self:: Finduseragentbykey (self:: $userAgent, ' opera/');        }          else         {      &N Bsp }            return self:: $version;    }          function matchuseragent ($ua, $key)     {        Preg_match ("/$key. ( [^s]*?] S/", $ua, $out);           return $out [1];    } }  $ua =useragentdetect::d etectuseragent ();   Print_r ($ua);