Completely master json

This article mainly shares with you what json is, so that you can fully master json, and I hope it can help you.

1.What isjson

The full English name of json is JavaScript Object Notation (it is an independent language and does not belong to JavaScript!!!)

json is a lightweight data exchange format that is easy to understand.

2.json syntax rules

Data is key/value pairs.

Data is separated by commas

Curly brackets save the object

Square brackets save the array

3.jsonData format

Key-value pair:

The key and value are both in double quotes, with a colon in the middle (equivalent to the equal sign), indicating a set of data

"name":"json"

Object:

{"name":"json","sex":"boy"}

Array:

"res":[
    {"firstName":"Tom","where":"A"},
    {"firstName":"John","where":"B"},
    {"firstName":"Sam","where":"C"}
]

Format explanation

1. An object can have multiple attributes, one attribute corresponds to one value, the object is used { } , the attributes and values ​​must be wrapped with "", the attributes and values ​​are separated by fire, and the attributes are separated by fire. Separate with commas,

For example: {fiestName” : “Tom”, “where” : “A” }

2.Use commas between multiple objects Separate;

3.The value can be an array, and the array contains many objects

4.jsonThe outermost layer needs to be { }Package

Related recommendations:

Detailed explanation of json_encode() and json_decode() functions in php

How to output json object in php

How to read local json file in php

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