判斷是否爲微信瀏覽器

1、PHP

if(strpos($_SERVER['HTTP_USER_AGENT'],"MicroMessenger "))
{
    echo "微信瀏覽器";
}

2、JS

var ua = window.navigator.userAgent.toLowerCase();
    if(ua.match(/MicroMessenger/i) == 'micromessenger'){
        return true;
    }else{
        alert("此活動只能在微信中參加。");
    }