如何只显示第二个时间段所需的时间

I currently have this function running to show the time by days, hours minutes etc. However I want to go from the code below to only showing the days, hours & minutes if they are above 1, otherwise to not show it.

function secondsToTime($seconds) {
    $dtF = new DateTime("@0");
    $dtT = new DateTime("@$seconds");
    return $dtF->diff($dtT)->format('%a days, %h hours, %i minutes and %s seconds');
}