PHP時間戳轉時間格式,時間格式轉xx小時前

/*
author:咔咔
wechat:fangkangfk
*/
function jsDateDiff(pTime) {
    var d_minutes, d_hours, d_days, d;
    var timeNow = parseInt(new Date().getTime() / 1000);
    pTime_new = new Date(pTime).getTime() / 1000;
    d = timeNow - pTime_new;
    d_days = parseInt(d / 86400);
    d_hours = parseInt(d / 3600);
    d_minutes = parseInt(d / 60);
    if (d_days > 0 && d_days < 4) {
        return d_days + "天前";
    } else if (d_days <= 0 && d_hours > 0) {
        return d_hours + "小時前";
    } else if (d_hours <= 0 && d_minutes > 0) {
        return d_minutes + "分鐘前";
    } else {
        return pTime;
    }
}