How to read JSON in PHP?

Question

PHP

[
  {
    "token": "тут токен",
    "id": "тут айди",
    "hidden_friends": 2,
    "timezone": "Europe/Kaliningrad"
  },
  {
    "token": "тут токен",
    "id": "тут айди",
    "hidden_friends": 0,
    "timezone": "Europe/Paris"
  }
]

Started writing

<?php

$users = file_get_contents('users.json');
$data = json_decode($users, true);

$id = $data['id'];

echo $id;
?>

and doesn't work

Answer 1

and doesn't work

...and shouldn't. In the "data" array, you don't have an element with the key "id". There are elements with keys "0" and "1", each of which contains an array, which in turn has an element with the key "id".
Accordingly, either refer directly to the element you are interested in: ... or iterate over all internal arrays:

foreach ($data as $datum) {
    $id = $datum['id'];
}