Bug #80380 [Ver]: Cannot access numeric property in ArrayObject
Edit report at https://bugs.php.net/bug.php?id=80380&edit=1
ID: 80380
Updated by: cmb@php.net
Reported by: anton at rudnikov dot net
Summary: Cannot access numeric property in ArrayObject
Status: Verified
Type: Bug
Package: SPL related
Operating System: any
PHP Version: 7.4.12
-Assigned To: cmb
+Assigned To:
Block user comment: N
Private report: N
New Comment:
Yes, that is another instance of the same root cause, which is
that ArrayObject treats object properties ("proptables") as arrays
("symtables"). Yet another instance:
<?php
$object = new stdClass;
$object->{'1'} = 'test1';
$arrayObject = new ArrayObject($object);
$arrayObject['2'] = 'test2';
var_dump($object);
?>
We have just created an inaccessible numeric property on the
stdClass instance.
It seems to me that the fix is not trivial, and that it might
break some existing code. As such, I don't think this should
be fixed for any stable PHP version, but rather documented.
Previous Comments:
------------------------------------------------------------------------
[2020-11-20 08:17:34] anton at rudnikov dot net
There's also interesting behaviour when I try to get array copy from ArrayObject using method
getArrayCopy.
Test script:
---------------
<?php
$object = new stdClass();
$object->prop = 'test1';
$object->{'1'} = 'test2';
$arrayObject = new ArrayObject($object);
$arrayCopy = $arrayObject->getArrayCopy();
var_dump($arrayCopy[1], $arrayCopy['1']); // can't access numeric property on array
copy
$array = (array) $object;
var_dump($array[1], $array['1']); // but it works if I just cast stdClass to array
var_dump($arrayCopy, $array); // let's see differences between arrays
Actual result:
--------------
Notice: Undefined offset: 1 in /tmp/preview on line 8
Notice: Undefined offset: 1 in /tmp/preview on line 8
NULL
NULL
string(4) "test"
string(4) "test"
array(1) {
["1"]=>
string(4) "test"
}
array(1) {
[1]=>
string(4) "test"
}
------------------------------------------------------------------------
[2020-11-19 12:32:08] cmb@php.net
The following pull request has been associated:
Patch Name: Fix #80380: Cannot access numeric property in ArrayObject
On GitHub: https://github.com/php/php-src/pull/6436
Patch: https://github.com/php/php-src/pull/6436.patch
------------------------------------------------------------------------
[2020-11-19 11:34:02] cmb@php.net
Given that numeric properties are accessible after array
conversion as of PHP 7.2.0, it seems wrong that this is not the
case with ArrayObjects.
------------------------------------------------------------------------
[2020-11-19 09:42:17] anton at rudnikov dot net
Changed package
------------------------------------------------------------------------
[2020-11-19 09:33:57] anton at rudnikov dot net
Description:
------------
I pass an object to ArrayObject constructor, and trying to access its properties. I can access
string properties, but I can't access numeric one
Test script:
---------------
<?php
$object = new stdClass;
$object->prop = 'test1';
$object->{'1'} = 'test2';
$arrayObject = new ArrayObject($object);
echo $arrayObject['prop']; // test1
echo $arrayObject['1']; // Undefined index
$arrayObject = new ArrayObject($object, ArrayObject::ARRAY_AS_PROPS);
echo $arrayObject->prop; // test1
echo $arrayObject->{'1'}; // Undefined index
Expected result:
----------------
test1
test2
test1
test2
Actual result:
--------------
test1
Notice: Undefined index: 1 in /in/9UdHs on line 9
test1
Notice: Undefined index: 1 in /in/9UdHs on line 13
------------------------------------------------------------------------
--
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