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;">
UA = getenv(HTTP_USER_AGENT);
$preparens = "";
$parens = "";
$i = strpos($this->UA,"(");
if ($i >= 0) {
$preparens = trim(substr($this->UA,$i));
$parens = substr($this->UA,$i+1,strlen($this->UA));
$j = strpos($parens,")");
if($j>=0) {
$parens = substr($parens,$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,strlen("Mozilla")) == "Mozilla") {
$this->BROWSER = "Netscape";
$leftover=substr($browVer,strlen("Mozilla")+1,strlen($browVer));
}
elseif(substr($browVer,strlen("Lynx")) == "Lynx") {
$this->BROWSER = "Lynx";
$leftover=substr($browVer,strlen("Lynx")+1,strlen("MSIE")) == "MSIE") {
$this->BROWSER = "IE";
$leftover=substr($browVer,strlen("MSIE")+1,strlen("Microsoft Internet Explorer")) == "Microsoft Internet Explorer") {
$this->BROWSER = "IE";
$leftover=substr($browVer,strlen("Microsoft Internet Explorer")+1,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,$i);
}
else {
$this->VERSION = $leftover;
}
$j = strpos($this->VERSION,".");
if($j >= 0) {
$this->MAJORVER = substr($this->VERSION,$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."
"; ?>
"; echo $test->BROWSER."
"; echo $test->PLATFORM."
"; echo $test->VERSION."
"; echo $test->MAJORVER."
"; echo $test->MINORVER."
"; ?>
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希望本文所述对大家PHP程序设计有所帮助。
原文链接：https://www.f2er.com/php/19983.html