php将秒数转为时分秒格式，用于倒计时

//秒数转时分秒
function changeTimeType($seconds){
    $seconds = intval($seconds);
    if ($seconds >3600){
       $hours =intval($seconds/3600);
       $minutes = $seconds % 3600;
       $time = $hours.":".gmstrftime('%M:%S',$minutes);
   }else{
       $time = gmstrftime('%H:%M:%S',$seconds);
   }
    return $time;
}