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Doc Bug #81508 http_build_query returns empty string given ArrayIterator as input
Submitted: 2021-10-05 15:28 UTC Modified: 2021-10-05 19:01 UTC
Votes:2
Avg. Score:2.0 ± 1.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: mintobit at gmail dot com Assigned:
Status: Open Package: URL related
PHP Version: 7.4.24 OS: Linux
Private report: No CVE-ID: None
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 [2021-10-05 15:28 UTC] mintobit at gmail dot com 
Description:
------------
Have not found anything related here https://www.php.net/manual/en/migration74.incompatible.php. Would appreciate if somebody can explain why this happened: wondering if this is expected and should be documented.

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

$array = [
    ['ids' => [1,2,3,4]],
    ['key' => 1]
];

var_dump(http_build_query(new ArrayIterator($array)));

Expected result:
----------------
string(92) "0%5Bids%5D%5B0%5D=1&0%5Bids%5D%5B1%5D=2&0%5Bids%5D%5B2%5D=3&0%5Bids%5D%5B3%5D=4&1%5Bkey%5D=1"

Actual result:
--------------
string(0) ""

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 [2021-10-05 16:00 UTC] requinix@php.net
-Status: Open +Status: Not a bug
 [2021-10-05 16:00 UTC] requinix@php.net 
> Calling get_object_vars() on an ArrayObject instance will now always return the
> properties of the ArrayObject itself (or a subclass). Previously it returned the
> values of the wrapped array/object unless the ArrayObject::STD_PROP_LIST flag
> was specified.
>
> Other affected operations are:
>
> * ReflectionObject::getProperties()
> * reset(), current(), etc. Use Iterator methods instead.
> * Potentially others working on object properties as a list, e.g. array_walk().

The third bullet point is the one that affects http_build_query().
 [2021-10-05 18:33 UTC] salathe@php.net
-Status: Not a bug +Status: Open
 [2021-10-05 18:33 UTC] salathe@php.net 
> Calling get_object_vars() on an ArrayObject instance will now ...

The quoted section from the migration guide references ArrayObject, but makes no mention that the change also applies to ArrayIterator.
 [2021-10-05 19:01 UTC] requinix@php.net 
Ah, yup, that is exactly what it says. My brain likes to bundle them together.

Presumably it's the same underlying change affecting both.
 [2022-12-21 09:15 UTC] McCullough1980Alice at gmail dot com 
've reimplemented http_build_query to leave empty objects/arrays in the returned query string (suffixed by an '=' symbol). I've enhanced it a bit from the default functionality as well, so all-in-all:

Maintains empty objects and arrays
Changed the default enc_type to RFC3986 (relevant to the ages)
Added a key-value separator argument (ability to override the default '=')
Removes numeric indices for numerically-indexed key-value pairs
I have not tested this in a production environment (no idea about performance or bugs), and it is not optimized, but very well spelled out.

(https://www.jcpenneykiosk.site/)github.com
 
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