Can you explain how it is accessible what is json in php?

Question

PHP

I read the definitions on the Internet and googled, but I can’t really understand why it is needed and what are the advantages of it?

Answer 1

If you need to transfer from one machine to another (or from one program to another) a string, you pass a string.
And if you need to transfer a data structure, for example, several ints, a couple of strings, an array with a nested array - here you can pack the entire data set in XML or JSON and transfer it, and on the other side it will unpack immediately into a ready-made structure.
JSON is more compact, XML is more powerful.
Both are supported in different programming languages ​​out of the box.
This is if in a nutshell.

Answer 2

JSON is a special kind of string that can be parsed on any side. Through it, you can transfer data arrays. For example, from php to javascript.
PHP:

// передаем массив $arr на клиент в виде JSON
$arr = [
    'name' => 'Петр'
];

echo json_encode ($arr);

You will get a string like this.
JS:

// принимаем строку, парсим и получаем объект таким, каким он был на сервере в PHP
var r = JSON.parse ('{"name": "Петр"}');

alert (r.name);
// выведет "Петр"

console.log (r);

/*
Получится объект такого вида:

var r = {
    'name': 'Петр'
};
*/

Answer 3

When you implement a client-server application, you will immediately understand :) I was also skeptical about this :) And as soon as I saw all the beauty of JSON, I scolded myself for bad thoughts in his direction.)

Answer 4

if extremely briefly: json is a data format
and it doesn’t matter in php, js or stupidly in a text file