Description:
------------
ArrayObject has a method called setFlags. This method is still not documented (set bug #34101). Anyway, I found out what is its possible purpose - if the passed parameter is an even number then ArrayObject's internal array values are printed in var_dump and if the passed parameter is an odd number then object properties of the class which extends ArrayObject are show. (See also bug #33799).

But I suggest setFlags fills another gap: set possible values to be 0, 1 or 2. 0 and 1 keep old functionality and 2 allows var_dump to print both internal array values and properties of the class.

Reproduce code:
---------------
<?
class dummy extends ArrayObject {
	public $var;
	function __construct() {
		$this->var = 'override';
		$this['internal'] = 'base';
	}
}

$foo = new dummy();
for ($i = 0; $i < 3; $i++) {
	$foo->setFlags ($i);
	var_dump($foo);
}


Expected result:
----------------
object(dummy)#1 (1) {
  ["internal"]=>
  string(4) "base"
}
object(dummy)#1 (1) {
  ["var"]=>
  string(8) "override"
}
object(dummy)#1 (2) {
  ["internal"]=>
  string(4) "base",
  ["var"]=>
  string(8) "override"
}


Actual result:
--------------
object(dummy)#1 (1) {
  ["internal"]=>
  string(4) "base"
}
object(dummy)#1 (1) {
  ["var"]=>
  string(8) "override"
}
object(dummy)#1 (1) {
  ["internal"]=>
  string(4) "base"
}