<?php
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
	
	/* 构造函数开始 */
	function __construct(){
		$this->UA = getenv(HTTP_USER_AGENT);
		$start  = strpos($this->UA,"(")+1;//查看起始位置
		$length = strpos($this->UA,")")-$start;//查看结束位置
		$middle = trim(substr($this->UA,$start,$length)); //查看内容
		$end  = trim(substr($this->UA,$start+$length+1));//附加内容
		$message = explode(";",$middle);//转换成数组
		//----------操作系统-----------------
		$os = trim($message['2']);
		$os_array = explode(" ",$os);
		$this->PLATFORM = trim($os_array['0']);//操作系统
		//------------浏览器------------
		$brower = trim($message['1']);
		if(preg_match("/msie/i",$brower)){//IE核心浏览器
			$brow_array =explode(" ",$brower);
			$this->BROWSER = "IE";
			$this->VERSION = $brow_array['1'];
		}else{//其它浏览器
			$brower =explode(" ",$end);
			$brow_array =explode("/",$brower['1']);
			$this->BROWSER = $brow_array['0'];
			$this->VERSION = $brow_array['1'];
		}
	}
}