function removeZeros($number) { return (int)preg_replace('/0+/', '', $number); }
function isLeapYear($year) { if ($year % 4 !== 0) { return false; } elseif ($year % 100 !== 0) { return true; } elseif ($year % 400 !== 0) { return false; } else { return true; } }
function daysUntilEndOfMonth() { $today = new DateTime(); $lastDayOfMonth = new DateTime($today->format('Y-m-t')); $interval = $lastDayOfMonth->diff($today); return $interval->days; }