PHP Decode

--TEST--
SPL: RegexIterator::GET_MATCH, USE_KEY
--FILE--
<?php

class MyRegexIterator extends RegexIterator
{
    function show()
    {
        foreach($this as $k => $v)
        {
            var_dump($k);
            var_dump($v);
        }
    }
}

$ar = new ArrayIterator(array('1'=>0,'1,2'=>1,'1,2,3'=>2,0=>3,'FooBar'=>4,','=>5,',,'=>6));
$it = new MyRegexIterator($ar, '/(\d),(\d)/', RegexIterator::GET_MATCH, RegexIterator::USE_KEY);
$it->show();

$it = new MyRegexIterator($ar, '/(\d)/', RegexIterator::GET_MATCH, RegexIterator::USE_KEY);
$it->show();

var_dump($ar);

?>
--EXPECTF--
string(3) "1,2"
array(3) {
  [0]=>
  string(3) "1,2"
  [1]=>
  string(1) "1"
  [2]=>
  string(1) "2"
}
string(5) "1,2,3"
array(3) {
  [0]=>
  string(3) "1,2"
  [1]=>
  string(1) "1"
  [2]=>
  string(1) "2"
}
int(1)
array(2) {
  [0]=>
  string(1) "1"
  [1]=>
  string(1) "1"
}
string(3) "1,2"
array(2) {
  [0]=>
  string(1) "1"
  [1]=>
  string(1) "1"
}
string(5) "1,2,3"
array(2) {
  [0]=>
  string(1) "1"
  [1]=>
  string(1) "1"
}
int(0)
array(2) {
  [0]=>
  string(1) "0"
  [1]=>
  string(1) "0"
}
object(ArrayIterator)#%d (1) {
  ["storage":"ArrayIterator":private]=>
  array(7) {
    [1]=>
    int(0)
    ["1,2"]=>
    int(1)
    ["1,2,3"]=>
    int(2)
    [0]=>
    int(3)
    ["FooBar"]=>
    int(4)
    [","]=>
    int(5)
    [",,"]=>
    int(6)
  }
}