for ($d = $beg_day; ($d <= $end_day && $m == $end_month) || ($m != $end_month && $d <= $days); $d++) {

##</code><code>##

# if ($m = "12") { $days = "31"}
if ($m == 12) { $days = 31 }

##</code><code>##

for ($d = $beg_day; $month == $end_month ? $d <= $end_day : $d <= $days; $d++) {