判断UA这种事不能说的太明。

【微博】 Mozilla/5.0 (Linux; U; Android 4.2.2; zh-cn; GT-I9502 Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30

【chrome】 Mozilla/5.0 (Linux; Android 4.2.2; GT-I9502 Build/JDQ39) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.64 Mobile Safari/537.36

【猎豹】 Mozilla/5.0 (Linux; Android 4.2.2; GT-I9502 Build/JDQ39) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.64 Mobile Safari/537.36

【海豚】 Mozilla/5.0 (Linux; U; Android 4.2.2; zh-cn; GT-I9502 Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30

【UC】 Mozilla/5.0 (Linux; U; Android 4.2.2; zh-CN; GT-I9502 Build/JDQ39) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 UCBrowser/9.4.2.365 U3/0.8.0 Mobile Safari/533.1

【baidu】 Mozilla/5.0 (Linux; U; Android 4.2.2; zh-cn; GT-I9502 Build/JDQ39) AppleWebKit/534.24 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.24 T5/2.0 baidubrowser/4.2.13.3 (Baidu; P1 4.2.2)

【QQ】 MQQBrowser

【搜狗】 SogouMSE, SogouMobileBrowser

【小米】 XiaoMi/MiuiBrowser

【遨游】 Maxthon

【欧朋】 Opera, Oupeng

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/* function check_useragent(){  var bool_result='success';  var pattern=/micromessenger|360browser|360|MQBrowser\/(.*?)\s+\(iPhone;|Mozilla\/(.*?)\s+\(iPhone;|sina_weibo/i;  var useragent='<?php echo strtoupper($_SERVER['HTTP_USER_AGENT']);?>';  var referer = '<?php echo strtoupper($_SERVER['HTTP_REFERER'])?>';  if(useragent.indexOf(('360ee').toUpperCase()) != -1 || useragent.indexOf(('360se').toUpperCase()) != -1) {  // location.href= "http://pc.huochepiao.360.cn";   return;  }  if(!useragent.match(pattern)){   bool_result=useragent.indexOf(('Android').toUpperCase())==-1?'failed_pc':'failed_mb';  }  return bool_result;  } <?php if(@$_SERVER['SERVER_NAME']!='10.16.15.227'&&@$_SERVER['SERVER_NAME']!='12306.com'){?>  var sta=check_useragent();  if(sta=='failed_pc'){   if(navigator.userAgent.indexOf('iPhone')>-1){    location.href='error.html?pc';   }else{    location.href='errorpc.html';   }  }  else if(sta=='failed_mb'){   if(referer.indexOf('weibo.cn') > -1) {   if(navigator.userAgent.indexOf('MQQBrowser')>-1 || navigator.userAgent.indexOf('SogouMSE')>-1 || navigator.userAgent.indexOf('SogouMobileBrowser')>-1 || navigator.userAgent.indexOf('XiaoMi')>-1 || navigator.userAgent.indexOf('MiuiBrowser')>-1 || navigator.userAgent.indexOf('Maxthon')>-1 || navigator.userAgent.indexOf('Opera')>-1 || navigator.userAgent.indexOf('Oupeng')>-1  || navigator.userAgent.indexOf('UCBrowser')>-1){    location.href='error.html?mb';   }   } else {    location.href='error.html?mb';   }  } <?php }?>  */