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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