PHP实现的浏览器检查类

本文实例讲述了PHP实现的浏览器检查类。分享给大家供大家参考，具体如下：

    <?php
    //原作者：epsilon7
    //SonyMusic([email]sonymusic@163.net[/email])
    class BrowserDetector {
     var $UA = "";  //$HTTP_USER_AGENT的内容
     var $BROWSER= "Unknown";  //浏览器类型
     var $PLATFORM  = "Unknown";  //操作系统
     var $VERSION= "";  //浏览器版本号
     var $MAJORVER  = "";  //浏览器主版本号
     var $MINORVER  = "";  //浏览器副版本号
     /* 构造函数开始 */
     function BrowserDetector(){
      $this->UA  = getenv(HTTP_USER_AGENT);
      $preparens = "";
      $parens = "";
      $i = strpos($this->UA,"(");
      if ($i >= 0)  {
        $preparens = trim(substr($this->UA,0,$i));
        $parens = substr($this->UA,$i+1,strlen($this->UA));
        $j = strpos($parens,")");
        if($j>=0) {
         $parens = substr($parens,0,$j);
        }
      }
      else  {
        $preparens = $this->UA;
      }
      $browVer = $preparens;
      $token = trim(strtok($parens,";"));
      while($token)  {
        if($token=="compatible") {
        }
        elseif(preg_match("/MSIE/i","$token")) {
         $browVer = $token;
        }
        elseif(preg_match("/Opera/i","$token")) {
         $browVer = $token;
        }
        elseif(preg_match("/X11/i","$token") || preg_match("/SunOS/i","$token") || preg_match ("/Linux/i","$token")) {
         $this->PLATFORM  = "Unix";
        }
        elseif(preg_match("/Win/i","$token")) {
         $this->PLATFORM  = $token;
        }
        elseif(preg_match("/Mac/i","$token") || preg_match("/PPC/i","$token")) {
         $this->PLATFORM  = $token;
        }
        $token = strtok(";");
      }
      $msieIndex = strpos($browVer,"MSIE");
      if($msieIndex >= 0)  {
        $browVer = substr($browVer,$msieIndex,strlen($browVer));
      }
      $leftover  = "";
      if(substr($browVer,0,strlen("Mozilla")) == "Mozilla")  {
        $this->BROWSER = "Netscape";
        $leftover=substr($browVer,strlen("Mozilla")+1,strlen($browVer));
      }
      elseif(substr($browVer,0,strlen("Lynx")) == "Lynx")  {
        $this->BROWSER = "Lynx";
        $leftover=substr($browVer,strlen("Lynx")+1,strlen($browVer));
      }
      elseif(substr($browVer,0,strlen("MSIE")) == "MSIE") {
        $this->BROWSER = "IE";
        $leftover=substr($browVer,strlen("MSIE")+1,strlen($browVer));
      }
      elseif(substr($browVer,0,strlen("Microsoft Internet Explorer")) == "Microsoft Internet Explorer")  {
        $this->BROWSER = "IE";
        $leftover=substr($browVer,strlen("Microsoft Internet Explorer")+1,strlen($browVer));
      }
      elseif(substr($browVer,0,strlen("Opera")) == "Opera")  {
        $this->BROWSER = "Opera";
        $leftover=substr($browVer,strlen("Opera")+1,strlen($browVer));
      }
      $leftover = trim($leftover);
      $i=strpos($leftover," ");
      if($i > 0)  {
        $this->VERSION = substr($leftover,0,$i);
      }
      else  {
        $this->VERSION = $leftover;
      }
      $j = strpos($this->VERSION,".");
      if($j >= 0)  {
        $this->MAJORVER = substr($this->VERSION,0,$j);
        $this->MINORVER = substr($this->VERSION,$j+1,strlen($this->VERSION));
      }
      else  {
        $this->MAJORVER = $this->VERSION;
      }
     }
    }
    //测试程序开始
    $test=new browserdetector;
    echo $test->UA."<br>";
    echo $test->BROWSER."<br>";
    echo $test->PLATFORM."<br>";
    echo $test->VERSION."<br>";
    echo $test->MAJORVER."<br>";
    echo $test->MINORVER."<br>";
    ?>

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