DatePeriod woes PHP 5.5

dateperiod.test.php

<?php

$period = new DatePeriod(new DateTime, new DateInterval('P1M'), new DateTime('+1 year'));
var_dump($period); // shows public $interval

var_dump($period->interval); // new empty DateInterval object
var_dump($period->interval); // new empty DateInterval object

// $period->interval->m undefined

output

class DatePeriod#1 (6) {
  public $start =>
  class DateTime#8 (3) {
    public $date =>
    string(19) "2014-01-06 16:28:46"
    public $timezone_type =>
    int(3)
    public $timezone =>
    string(17) "America/Vancouver"
  }
  public $current =>
  NULL
  public $end =>
  class DateTime#7 (3) {
    public $date =>
    string(19) "2015-01-06 16:28:46"
    public $timezone_type =>
    int(3)
    public $timezone =>
    string(17) "America/Vancouver"
  }
  public $interval =>
  class DateInterval#6 (15) {
    public $y =>
    int(0)
    public $m =>
    int(1)
    public $d =>
    int(0)
    public $h =>
    int(0)
    public $i =>
    int(0)
    public $s =>
    int(0)
    public $weekday =>
    int(0)
    public $weekday_behavior =>
    int(0)
    public $first_last_day_of =>
    int(0)
    public $invert =>
    int(0)
    public $days =>
    bool(false)
    public $special_type =>
    int(0)
    public $special_amount =>
    int(0)
    public $have_weekday_relative =>
    int(0)
    public $have_special_relative =>
    int(0)
  }
  public $recurrences =>
  int(1)
  public $include_start_date =>
  bool(true)
}
class DateInterval#5 (0) {
}
class DateInterval#4 (0) {
}
NULL