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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希望本文所述对大家PHP程序设计有所帮助。