例如：1400；
方法：
public function sTime($times)
{
$restul="00:00:00"
if($times > 0){
$hour = floor($times /3600);
$minute=floor（($times -3600 * $hour) / 60）;
$second = florr ((($times -3600 *$hour) -60 * $minute) % 60);
$hour = $hour < 10 ? '0'.$hour:$hour;
$minute = $minute < 10 ? '0'.$minute:$minute;
$second = $second < 10 ? '0'.$second :$second ;
}
return $hour.':'.$minute.':'.$second ;
}
结果为：00:23:20
