[PHP-BUG] Doc #81508 [NEW]: http_build_query returns empty string given ArrayIterator as input

From:             mintobit at gmail dot com
Operating system: Linux
PHP version:      7.4.24
Package:          URL related
Bug Type:         Documentation Problem
Bug description:http_build_query returns empty string given ArrayIterator as input

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) ""

-- 
Edit bug report at https://bugs.php.net/bug.php?id=81508&edit=1
-- 
Fix committed:                    https://bugs.php.net/fix.php?id=81508&r=fixed
Fixed in release:                 https://bugs.php.net/fix.php?id=81508&r=alreadyfixed
Need backtrace:                   https://bugs.php.net/fix.php?id=81508&r=needtrace
Need Reproduce Script:            https://bugs.php.net/fix.php?id=81508&r=needscript
Try newer version:                https://bugs.php.net/fix.php?id=81508&r=oldversion
Not developer issue:              https://bugs.php.net/fix.php?id=81508&r=support
Expected behavior:                https://bugs.php.net/fix.php?id=81508&r=notwrong
Not enough info:                  https://bugs.php.net/fix.php?id=81508&r=notenoughinfo
Submitted twice:                  https://bugs.php.net/fix.php?id=81508&r=submittedtwice
register_globals:                 https://bugs.php.net/fix.php?id=81508&r=globals
PHP version support discontinued: https://bugs.php.net/fix.php?id=81508&r=phptooold
Daylight Savings:                 https://bugs.php.net/fix.php?id=81508&r=dst
IIS Stability:                    https://bugs.php.net/fix.php?id=81508&r=isapi
Install GNU Sed:                  https://bugs.php.net/fix.php?id=81508&r=gnused
Floating point limitations:       https://bugs.php.net/fix.php?id=81508&r=float
No Zend Extensions:               https://bugs.php.net/fix.php?id=81508&r=nozend
MySQL Configuration Error:        https://bugs.php.net/fix.php?id=81508&r=mysqlcfg