php 寫了一個Calendar，但當要跨年份的時候就不行了！

Question

$date=strtotime(date("Y-m-d"));$day=date('d',$date);$month=str_pad($_GET['m'],2,'0',STR_PAD_LEFT);$year=date('Y',$date);$firstDay=mktime(0,0,0,$month,1,$year);$title=strftime('%m',$firstDay);$dayOfWeek=date('D',$firstDay);$daysInMonth=cal_days_in_month(0,$month,$year);$timestamp=strtotime('nextSunday');$weekDays=array('日','一','二','三','四','五','六');for($i=0;$i

Answer 1

if($month==0)
{
$year--;
$month=12;
}
if($month==13)
{
$year++;
$month=1;
}