PHP study notes 7-JSON data operations

JSON, the full name is JavaScript Object Notation. It is a lightweight data exchange format based on the JavaScript programming language ECMA-262 3rd Edition-December 1999 standard, which is mainly used to exchange data with the server. Similar to XML, it is independent of language and has great advantages in cross-platform data transmission.

Create a new file json.php and do the encode operation first:

<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>

The result is [1,2,3,4 ,5,6,7,8,9,"Hello","PHP"]

Do the decode operation again:

<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>

The above introduces PHP study notes 7-JSON data operations, including aspects of the content. I hope it will be helpful to friends who are interested in PHP tutorials.