js判断是否在微信浏览器中打开

function is_weixn(){
var ua = navigator.userAgent.toLowerCase();
if(ua.match(/MicroMessenger/i)=="micromessenger") {
return true;
} else {
return false;
}
}

    $(function () {
      //          不是微信就跳到授权页
      var ua = window.navigator.userAgent.toLowerCase();
      if(ua.match(/MicroMessenger/i) == 'micromessenger'){
        return true;
      }else{
        location.href='http://ww.abc.com'
      }
    });

function is_weixin(){
if ( strpos($_SERVER['HTTP_USER_AGENT'], 'MicroMessenger') !== false ) {
return true;
}
return false;
}