Array numeric string as key

Bug #69125

Submitted:

2015-02-26 13:23 UTC

Modified:

2015-02-26 13:37 UTC

Votes:	1
Avg. Score:	5.0 ± 0.0
Reproduced:	0 of 1 (0.0%)

From:

dm@php.net

Assigned:

Status:

Closed

Package:

opcache

PHP Version:

5.6.6

OS:

Ubuntu 14.04

Private report:

CVE-ID:

None

[2015-02-26 13:23 UTC] dm@php.net

Description:
------------
Numeric string as array key is allowed (not cast to int) if the key value is passed as constant (or possibly some other way too).
This can be achieved by casting object with numeric properties to array, but normally one cannot assign numeric string as array key.

Also, `isset($array['0'])` returns `false` even tho it exists. (possibly another bug or a feature?)

Test script:
---------------
<?php

const SZERO = '0';

$array[SZERO] = PHP_VERSION;

var_dump($array);


Expected result:
----------------
array (size=1)
  0 => string '5.6.6-1+deb.sury.org~trusty+1' (length=29)

Actual result:
--------------
array (size=1)
  '0' => string '5.6.6-1+deb.sury.org~trusty+1' (length=29)

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[2015-02-26 13:25 UTC] dm@php.net

-Package: optimizer +Package: opcache

[2015-02-26 13:37 UTC] dm@php.net

`var_dump(isset($array[SZERO]), isset($array['0']), isset($array[0]));` returns `false` for every expression.

[2015-02-27 01:37 UTC] edgar dot r dot sandi at gmail dot com

Hi!

maybe that's not a bug, i think that the error is in the attribution of constant.

If you use:
const SZERO = 0; // as int instead string

Then the outputs of:
var_dump(isset($array[SZERO]), isset($array['0']), isset($array[0]));

Will be:
bool(true)
bool(true)
bool(true)

cheers
Edgar R. Sandi