How to use json_encode () in php

This article mainly introduces how to use json_encode () in php, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand.

Json_encode ()

This function is mainly used to convert arrays and objects to json format. Let's take a look at an example of array conversion:

$arr = array ('averse = > 1) arr ($arr)

The result is

{"a": 1, "b": 2, "c": 3, "d": 4, "e": 5}

Let's look at another example of object conversion:

$obj- > body = 'another post';$obj- > id = 21 * * obj-> approved = true;$obj- > favorite_count = 1 * obj-> status = NULL;echo json_encode ($obj)

The result is

{"body": "another post", "id": 21, "approved": true, "favorite_count": 1, "status": null}

Because json only accepts utf-8-encoded characters, the argument to json_encode () must be utf-8-encoded, otherwise you will get a null character or null. You should pay special attention to this when you use GB2312 coding in Chinese or ISO-8859-1 coding in foreign languages.

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