How to add new value to json string using php?

Question

PHP

There is a line.

[{"id":7,"children":[{"id":2,"children":[{"id":5}]},{"id":3,"children":[{"id":1},{"id":6},{"id":4}]}]}]

You need to add a new value, for example, at the beginning of the line.
How to properly parse this string and add a new value?

Answer 1

1) json_decode
2) manipulation
3) json_encode
4) profit

Answer 2

Here and there