How to converts JSON string into a PHP variable? - php

Question

I was trying to parse the json data from a url using cURL and then json_decode to access the objects but I failed. I already search it how to access but I failed.
this is the links that I visited hoping that I can solve the problem.
http://www.dyn-web.com/tutorials/php-js/json/decode.php
https://stackoverflow.com/questions/12429029/php-get-values-from-json-encode
https://stackoverflow.com/questions/20193575/fetch-json-data-using-php
https://stackoverflow.com/questions/12429029/php-get-values-from-json-encode
https://stackoverflow.com/questions/4433951/decoding-json-after-sending-using-php-curl
this is the result of the var_dump($obj);
array(1) {
["login"]=>
array(2) {
["error"]=>
bool(false)
["user"]=>
array(5) {
["br_code"]=>
int(0)
["mem_id"]=>
int(202)
["username"]=>
string(8) "johndoe"
["email"]=>
string(33) "johndoe#gmail.com"
["created_at"]=>
string(19) "2017-08-07 15:35:39"
}
}
}
and this is my PHP code
<?php
session_start();
$ch = curl_init('http://localhost/sample/login.php');
$username= $_SESSION["USERNAME"];
$password= $_SESSION["PASSWORD"];
$credentials = [
'username' => $username,
'password' => $password
];
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $credentials);
curl_setopt($ch, CURLOPT_USERNAME, "{$username}:{$password}");
// execute!
$response = curl_exec($ch);
// close the connection
curl_close($ch);
$obj= json_decode($response, true);
// echo $obj; // Notice: Array to string conversion in
// echo $obj[0]; // Undefined offset
// echo $obj->user; //Trying to get property of non-object in
var_dump($obj);
?>

Answer 1

seems an array of array so
eg: for username
var_dump($obj['login']['user']['username']);
and so on for others values
$my_username = $obj['login']['user']['username']);

Answer 2

Your data is in login array so try following to get details of user
$user = $obj['login']['user'];
//to print email
echo $user['email'];
//to print username
echo $user['username'];
//so on

Answer 3

When you do json_decode($response, true), and you are using second parameter as true, it will decode it into associative array.
Your var_dump also says that it is array. So, you need to access $obj as array not object
if you want to access the user array:
$obj['login']['user']
if you want to access the username/br_code:
$obj['login']['user']['username'];
$obj['login']['user']['br_code'];
more info about json_decode

Answer 4

json_decode decodes a JSON string into a multi dimensional array
you get that error because in PHP objects are not arrays
just access with [] and you are fine
$obj['user']['field_requested']