php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login

go to bug id or search bugs for

Bug #51015 Array keys can not be used to get values
Submitted: 2010-02-11 13:57 UTC Modified: 2010-02-12 18:48 UTC
From: nat at search dot ch Assigned:
Status: Not a bug Package: *General Issues
PHP Version: 5.3.1 OS: Linux #1 SMP 2009-08-15 17:53:59
Private report: No CVE-ID: None
View Developer Edit
Welcome back! If you're the original bug submitter, here's where you can edit the bug or add additional notes.
If you forgot your password, you can retrieve your password here.
Password:
Status:
Package:
Bug Type:
Summary:
From: nat at search dot ch
New email:
PHP Version: OS:

 

 [2010-02-11 13:57 UTC] nat at search dot ch 
Description:
------------
In an associative array with number as text keys, the keys can not be used to get the values. "Foreach" works.

  var_dump($choices);      
// array(2) { ["1"]=>  array(2) { [0]=>  string(1) "0" [1]=>  string(1) "1" } ["0"]=>  array(2) { [0]=>  string(1) "0" [1]=>  string(1) "1" } }

  var_dump($choices['1']); // NULL
  var_dump($choices[1]);   // NULL
  var_dump($choices["1"]); // NULL
  var_dump($choices->{1}); // NULL
  var_dump($choices->{'1'});//NULL
  var_dump($choices['0']);  //NULL
  var_dump($choices[0]);    //NULL

 foreach ($choices as $k => $v) {
    var_dump($k, $v);
  }

// string(1) "1" array(2) { [0]=> string(1) "0" [1]=> string(1) "1" }
// string(1) "0" array(2) { [0]=> string(1) "0" [1]=> string(1) "1" }


Reproduce code:
---------------
$db_data_model='{"events":{"1":"film","0":"avatar"},"times":{"0":"2010-10-09 08:00","2":"2010-10-09 11:00","3":"2010-09-09"},"choices":{"1":["0","1"],"0":["0","1"]}}';
$model = json_decode($db_data_model);
$choices = (array)$model->choices;
var_dump($choices);
var_dump($choices['1']); // NULL
var_dump($choices[1]);   // NULL
var_dump($choices->{1}); // NULL
var_dump($choices->{'1'});//NULL

foreach ($choices as $k => $v) {
    var_dump($k, $v);
}



Expected result:
----------------
var_dump($choices['1']);

// array(2) { [0]=> string(1) "0" [1]=> string(1) "1" }

var_dump($choices['0']);

// array(2) { [0]=> string(1) "0" [1]=> string(1) "1" }

Actual result:
--------------
var_dump($choices['1']);

// NULL

var_dump($choices['0']);

// NULL

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2010-02-12 16:45 UTC] jani@php.net 
RTFM:

http://php.net/array#language.types.array.casting

"If an object is converted to an array, the result is an array whose elements are the object's properties. The keys are the member variable names, with a few notable exceptions: integer properties are unaccessible.."

And you could also access those directly without casting anyway, like this:

var_dump($model->choices->{1});
 [2010-02-12 18:48 UTC] nat at search dot ch 
$choices is a variable of a new kind. It is no:
- Boolean
- Integer
- Floating point number
- String
- Array
- Object
It is an inconsequence with the rest of php.
I think this case should be considered in future versions.
 
PHP Copyright © 2001-2025 The PHP Group
All rights reserved. 		Last updated: Thu Dec 04 18:00:01 2025 UTC