一个浏览器检查类

//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." "?>;