for ($m = $beg_month; $m <= $end_month; $m++) {

 if ($m = "1") { $days = "31"} # to specify days in month
 if ($m = "2") { $days = "28"}
 . . . . 
 if ($m = "12") { $days = "31"}

 for ($d = 1; $d < $days; $d++) {
  print "$m-$d-$year"; # year is inputed as well
 }
}