format = function (date, format) {
  format = format || 'MMddhhmm';
  var o = {
    "M+": date.getMonth() + 1, //month
    "d+": date.getDate(), //day
    "h+": date.getHours(), //hour
    "m+": date.getMinutes(), //minute
    "s+": date.getSeconds(), //second
    "q+": Math.floor((date.getMonth() + 3) / 3), //quarter
    "S": date.getMilliseconds() //millisecond
  };

  if (/(y+)/.test(format)) {
    format = format.replace(RegExp.$1, (date.getFullYear() + "").substr(4 - RegExp.$1.length));
  }

  for (var k in o) {
    if (new RegExp("(" + k + ")").test(format)) {
      format = format.replace(RegExp.$1, RegExp.$1.length === 1 ? o[k] :
        ("00" + o[k]).substr(("" + o[k]).length));
    }
  }
  return format;
};

使用方法：

format(new Date, 'yyyy-MM-dd hh:mm:ss');
//"2017-07-17 14:16:08"

php:

相对来说PHP格式化就容易多了

$date = date_format(date_create(),"Ymd");