PHP把秒數轉換成天數，小時數和分鐘

function secsToStr($secs) {
    if($secs>=86400){$days=floor($secs/86400);
    $secs=$secs%86400;
    $r=$days.' day';
    if($days<>1){$r.=&#39;s&#39;;}
    if($secs>0){$r.=&#39;, &#39;;}}
    if($secs>=3600){$hours=floor($secs/3600);
    $secs=$secs%3600;
    $r.=$hours.&#39; hour&#39;;
    if($hours<>1){$r.=&#39;s&#39;;}
    if($secs>0){$r.=&#39;, &#39;;}}
    if($secs>=60){$minutes=floor($secs/60);
    $secs=$secs%60;
    $r.=$minutes.&#39; minute&#39;;
    if($minutes<>1){$r.=&#39;s&#39;;}
    if($secs>0){$r.=&#39;, &#39;;}}
    $r.=$secs.&#39; second&#39;;
    if($secs<>1){$r.=&#39;s&#39;;
    }
    return $r;
}

<?php
$seconds = "56789";
$output = secsToStr($seconds);
echo $output;
?>