Helpful PHP Date Diff

 public static function DateDiff($d1, $d2) {
  if($d1 == $d2) return 0;
  $d1 = (int)strtotime($d1);
  $d2 = (int)strtotime($d2);
  $timz = array(
   "year"    =>    (60 * 60 * 24 * 365),
   "mth"    =>    (60 * 60 * 24 * 30),
   "day"    =>    (60 * 60 * 24),
   "hour"    =>    (60 * 60),
   "min"    =>    (60)
  );
  $diff = abs($d1 - $d2);
  $y = floor($diff / $timz["year"]);
  $M = floor(($diff - ($y * $timz["year"])) / $timz["mth"]);
  $d = floor((($diff - ($y * $timz["year"]) - ($M * $timz["mth"])) / $timz["day"]));
  $w = ($d > 6) ? floor($d / 7) : 0;
  $h = floor((($diff - ($y * $timz["year"]) - ($M * $timz["mth"]) - ($d * $timz["day"])) / $timz["hour"]));
  $m = floor((($diff - ($y * $timz["year"]) - ($M * $timz["mth"]) - ($d * $timz["day"]) - ($h * $timz["hour"])) / $timz["min"]));
  $s = floor($diff - (($y * $timz["year"]) + ($M * $timz["mth"]) + ($d * $timz["day"]) + ($h * $timz["hour"]) + ($m * $timz["min"])));
  return array($y, $M, $w, $d, $h, $m, $s);
 }