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Bug #74859 json_decode unexpected behaviour
Submitted: 2017-07-05 18:24 UTC Modified: 2017-07-06 15:27 UTC
From: emimarz at gmail dot com Assigned:
Status: Duplicate Package: JSON related
PHP Version: Irrelevant OS: linux
Private report: No CVE-ID: None
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From: emimarz at gmail dot com
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 [2017-07-05 18:24 UTC] emimarz at gmail dot com 
Description:
------------
this unexpected behaviour happen on php 5.* and 7.1 with json_decode



Test script:
---------------
<?php
 
$son = '{
"1":{ "id":"1", "name":"jack" },
"2":{ "id":"2", "name":"john" }
}';

$json = (array) json_decode($son);
//var_dump($json);
var_dump($json['1']); // incorrect result
var_dump($json[1]); // incorrect result
$json = json_decode($son,true);
var_dump($json['1']); // correct result

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 [2017-07-05 18:33 UTC] peehaa@php.net
-Status: Open +Status: Feedback
 [2017-07-05 18:33 UTC] peehaa@php.net 
What unexpected behavior?

Please explain what is expected and why and what the actual result is.
 [2017-07-06 14:57 UTC] emimarz at gmail dot com
-Status: Feedback +Status: Open
 [2017-07-06 14:57 UTC] emimarz at gmail dot com 
this two return NULL
var_dump($json['1']); // incorrect result
var_dump($json[1]); // incorrect result

I trying to access an element existent but return NULL
the expected return is something that is not NULL because that element exists
 [2017-07-06 15:27 UTC] requinix@php.net
-Status: Open +Status: Duplicate
 [2017-07-06 15:27 UTC] requinix@php.net 
Then this is a(nother) duplicate of a bug that has been fixed with 7.2.
https://3v4l.org/CS6BJ

In PHP 5.x/7.0/7.1, don't cast objects with numeric property names to arrays. Really, avoid creating those sorts of objects in the first place if you can.
For JSON decode straight to an array if you want an array, or in the general case use get_object_vars,
  https://3v4l.org/QcicS
or if you like to hurt yourself then you can use advanced syntax on the object.
  https://3v4l.org/ZARaP
 
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