JSON utility class

example.php

<?php

require 'json.php';

$json = new JSON;

$json->foo->bar->baz = "foo";
$json->foo->biz = "test";
$json->baz = array();
$json->baz[1] = "testing";
$json->baz[2] = "this";
$json->baz[3] = "out!";

$j2 = JSON::fromJSON($json->toJSON());

var_dump($json, $j2);

json.php

<?php

class JSON implements JSONSerializable {

    protected $data = array();

    public function &__get($key) {
        if (!isset($this->data[$key])) {
            $this->data[$key] = new static;
        }
        return $this->data[$key];
    }

    public function __set($key, $value) {
        $this->data[$key] = $value;
    }

    public function __isset($key) {
        return isset($this->data[$key]);
    }

    public function __unset($key) {
        unset($this->data[$key]);
    }

    public function jsonSerialize() {
        return $this->data;
    }

    public function toJSON() {
        return json_encode($this);
    }

    public static function fromJSON($json) {
        $tmp = json_decode($json);
        return self::parseJSONResult($tmp);
    }

    private static function parseJSONResult($json) {
        if (is_object($json)) {
            $obj = new static;
            foreach (get_object_vars($json) as $key => $value) {
                $obj->$key = self::parseJSONResult($value);
            }
            return $obj;
        } elseif (is_array($json)) {
            $ret = array();
            foreach ($json as $key => $value) {
                $ret[$key] = self::parseJSONResult($value);
            }
            return $ret;
        }
        return $json;
    }

}