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:
1 2 3 4 | <span>1</span> <span>
</span><span>2</span> <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>
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得到的结果是[1,2,3,4,5,6,7,8,9,"Hello","PHP"]
再来做decode操作:
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<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>
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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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