json_encode() returns an empty value

Question

I have a User object and I want to encode it to a JSON format, but json_encode() returns an empty value "{}". What I am doing wrong?

Here's my code:

<?php
header('Content-Type: application/json');
require_once 'DataBase.php';
include_once '../Model/User.php';
$user = DataBase::getUser('username', $_GET['q']); //getting User object
$json = json_encode($user); //returns "{}"
echo $json;

@Adelphia, var_dump returns display User object with properties, which I fetched from database. — koryakinp, Nov 10 '14 at 14:58

score 1 · Accepted Answer · answered Nov 10 '14 at 15:11

1

I found a solution. The properties of the User object were private. All I need is to created to_json() method in a User class.

answered Nov 10 '14 at 15:11

koryakinp

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You should accept your own answer when you're able to and unmark the other answer as accepted - since the other answer didn't solve your problem at all. – sjagr Nov 10 '14 at 19:25
I was able to slove my problem, only because Roman Sokolovskyy has provided a link to a similar issue. Should I mark both answers ? – koryakinp Nov 10 '14 at 20:03

score -3 · Answer 2 · edited May 23 '17 at 12:27

-3

I think because $user = DataBase::getUser('username', $_GET['q']); returns an object, not array

Using json_encode on objects in PHP (regardless of scope)

edited May 23 '17 at 12:27

Community

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answered Nov 10 '14 at 14:46

Roman Sokolovskyy

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There is no problem encoding objects with `json_encode`. Try `php -r "$a=new stdclass(); $a->b=1; echo json_encode($a);"` It will output `{"b":1}` as expected. – Oz Solomon Nov 10 '14 at 14:52
Yes, it returns a User object. – koryakinp Nov 10 '14 at 14:59

json_encode() returns an empty value

2 Answers2