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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以上就是php实现浏览器检查类的的方法及实例的详细内容。