一个浏览器检查类-PHP实例

//原作者：epsilon7 //SonyMusic(sonymusic@163.net) 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." "; echo $test->BROWSER." "; echo $test->PLATFORM." "; echo $test->VERSION." "; echo $test->MAJORVER." "; echo $test->MINORVER." "; ?> 

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