Comment convertir l'horodatage php en js

  function to_date(phpstr) {
      str = parseInt(phpstr) * 1000;
      var newDate = new Date(str);
      var year = newDate.getUTCFullYear();
      var month = newDate.getUTCMonth() + 1;
      var nowday = newDate.getUTCDate();
      var hours = newDate.getHours();
      var minutes = newDate.getMinutes();
      var seconds = newDate.getSeconds();
      return year + "-" + month + "-" + nowday + " " + hours + ":" + minutes + ":" + seconds;//拼接 2017-2-21 12:23:43    }
  }