Someone

function sec2hms ($sec, $padHours = false) 
  {

    // holds formatted string
    $dhms = "";
    $days = intval(intval($sec) / 86400);
    if ($days > 1) {
		$daysup = (86400*$days);
		$secs = $secs-$daysup;}
    $dhms .= str_pad($days, 2, "0", STR_PAD_LEFT). ':';
    $hours = intval(intval($sec) / 3600); 
    $dhms .= ($padHours) 
          ? str_pad($hours, 2, "0", STR_PAD_LEFT). ':'
          : $hours. ':';
     
    $minutes = intval(($sec / 60) % 60); 
    $dhms .= str_pad($minutes, 2, "0", STR_PAD_LEFT). ':';
    $seconds = intval($sec % 60); 
    $dhms .= str_pad($seconds, 2, "0", STR_PAD_LEFT);
    return $dhms;
  }