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PHP学习笔记7-JSON数据操作,php学习笔记7-json

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2016-06-13 08:59:401416browse

PHP学习笔记7-JSON数据操作,php学习笔记7-json

JSON,全称是JavaScript Object Notation。它是基于JavaScript编程语言ECMA-262 3rd Edition-December 1999标准的一种轻量级的数据交换格式,主要用于跟服务器进行交换数据。跟XML相类似,它独立语言,在跨平台数据传输上有很大的优势

 

新建文件json.php,先做encode操作:

<span>1</span> <span>//</span><span>encode
</span><span>2</span> <span>//生成JSON格式数据</span>
<span>3</span> <span>$arr</span> = <span>array</span>(1,2,3,4,5,6,7,8,9,'Hello','PHP'<span>);
</span><span>4</span> <span>echo</span> json_encode(<span>$arr</span>);<span>//</span><span>json_encode:把一个对象转换成json格式数据</span>

得到的结果是[1,2,3,4,5,6,7,8,9,"Hello","PHP"]

再来做decode操作:

<span>1</span> <span>//</span><span>decode 解码</span>
<span>2</span> <span>$jsonStr</span> = '{"h":"Hello","w":"World","0":[3,2,1]}'<span>;
</span><span>3</span> <span>$obj</span> = json_decode(<span>$jsonStr</span><span>);
</span><span>4</span> <span>echo</span> <span>$obj</span>->h;<span>//</span><span>使用成员访问的方式就可以得到结果</span>

 知道简单的使用方法后,可以尝试着抓API数据,比如天气...

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