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>";
?>

希望本文所述对大家PHP程序设计有所帮助。