<?php
$arr = array(
23 => array(
'foo' => 'bar',
'baz' => 'xyz'
),
55 => array(
'foo' => 'bar',
'baz' => 'xyz'
),
);
print_r($arr);
$serialized = json_encode($arr);
print_r($serialized);
$stdclass = json_decode($serialized);
print_r($stdclass);
$new_arr = (array) $stdclass;
print_r($new_arr);
print_r($new_arr['23']);//error
print_r($new_arr[23]);//error
?>