Adding new element to json file php

Question

Here's my code:

$user = new User($_POST['login'], $_POST['password'], $_POST['mail'], $_POST['name']);
$users = json_decode(file_get_contents('users.json'));
$users[] = $user->toArray();
file_put_contents('users.json', json_encode($users));

When the json file is empty, user gets added correctly, but when a user already exists in json file, when I try to add another user using this code, it just replaces the existing user.

Do a print_r($users) please when there is something in $users — RiggsFolly
– RiggsFolly, Commented Nov 15, 2022 at 16:37
@RiggsFolly yeah, the problem is that "$users = json_decode(file_get_contents('users.json'));" equals NULL, but why? — kirvel
– kirvel, Commented Nov 15, 2022 at 16:42

kirvel · Accepted Answer · 2022-11-15 16:57:46Z

2

Just needed to set 'associative' to true in json_decode:

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

answered Nov 15, 2022 at 16:57

kirvel

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