前面整理过一篇文章，描述php中的array与json的array和object的转换关系。http://www.cnblogs.com/x3d/p/php-json-array-object-type.html

在实际开发中，如何保障这种关系呢？一般来说，需要定义一些类型来做映射。

废话不多说，上码。

1. 最终用法

use hybrid\one\collection\JSONArray;// json$arr = new JSONArray();//$arr[2] = 444; // 异常 不是从0开始$arr[0] = 1;$arr[1] = 2;$arr[2] = 3;var_dump($arr->__toArray());$arr[6] = 66; // 异常 索引跳跃$arr['91'] = 91; // 异常 不是整型

2. 相关基础类

    data;    }        /**     * Returns an iterator for traversing the data.     * This method is required by the SPL interface [[\IteratorAggregate]].     * It will be implicitly called when you use `foreach` to traverse the collection.     * @return \ArrayIterator an iterator for traversing the cookies in the collection.     */    public function getIterator()    {        return new ArrayIterator($this->data);    }    /**     * Returns the number of data items.     * This method is required by Countable interface.     * @return integer number of data elements.     */    public function count()    {        return count($this->data);    }        /**     *      * @param mixed $offset     * @return boolean     */    private function offsetLegal($offset)    {        return is_int($offset);    }    /**     * This method is required by the interface [[\ArrayAccess]].     * @param int $offset the offset to check on     * @return boolean     */    public function offsetExists($offset)    {        if (!$this->offsetLegal($offset)) {            throw new IllegalOffsetException;        }        return isset($this->data[$offset]);    }    /**     * This method is required by the interface [[\ArrayAccess]].     * @param integer $offset the offset to retrieve element.     * @return mixed the element at the offset, null if no element is found at the offset     */    public function offsetGet($offset)    {        if (!$this->offsetLegal($offset)) {            throw new IllegalOffsetException;        }                return isset($this->data[$offset]) ? $this->data[$offset] : null;    }    /**     * This method is required by the interface [[\ArrayAccess]].     * @param integer $offset the offset to set element     * @param mixed $item the element value     */    public function offsetSet($offset, $item)    {        if (!$this->offsetLegal($offset)) {            throw new IllegalOffsetException;        }                if (!$this->offsetExists($offset) && ($offset > $this->count())) {            throw new IllegalOffsetException('offset value is illegal, must be ordered integer value or existed offset given');        }                $this->data[$offset] = $item;    }    /**     * This method is required by the interface [[\ArrayAccess]].     * @param mixed $offset the offset to unset element     */    public function offsetUnset($offset)    {        if (!$this->offsetLegal($offset)) {            throw new IllegalOffsetException;        }                unset($this->data[$offset]);    }}

3. 其它

JSONObject 类可以依葫芦画瓢。