Bug #75717 [Fbk->Csd]: RecursiveArrayIterator does not traverse arrays by reference

Edit report at https://bugs.php.net/bug.php?id=75717&edit=1 ID: 75717 Updated by: nikic@php.net Reported by: greg at girty dot net Summary: RecursiveArrayIterator does not traverse arrays by reference -Status: Feedback +Status: Closed Type: Bug Package: SPL related Operating System: OSX, Debian Linux PHP Version: 7.1.12 Block user comment: N Private report: N New Comment: Automatic comment on behalf of nikita.ppv@gmail.com Revision: http://git.php.net/?p=php-src.git;a=commit;h=ccb113c3e5964ef2d2e5b4ae3e67d61702db9bfc Log: Fixed bug #75717 Previous Comments: ------------------------------------------------------------------------ [2017-12-21 17:33:11] greg at girty dot net I created https://bugs.php.net/bug.php?id=75716 with errors, and closed it when I realized the mistake. (My first bug submission, forgive me I didn't know how to correct 75716, revoke it, or mark it as erroneous.) This is the correct version. ------------------------------------------------------------------------ [2017-12-21 16:22:13] peehaa@php.net Isn't this a dupe of https://bugs.php.net/bug.php?id=75716 ? ------------------------------------------------------------------------ [2017-12-21 16:17:27] greg at girty dot net Description: ------------ The expected behaviour of RecursiveArrayIterator is that only leaf nodes will be iterated, but if an array is contained by reference, it is not traversed, instead it is returned by next(). Explicit use of RecursiveIteratorIterator::LEAVES_ONLY has no affect. HHVM gives the expected result, see https://3v4l.org/up3me Test script: --------------- function flatten(array $nestedArraysAndStrings){ $flat=[]; $iter = new RecursiveIteratorIterator( new RecursiveArrayIterator($nestedArraysAndStrings)); foreach($iter as $leaf){ $flat[] = $leaf; } return join(NULL, $flat); } $noRefs = [[[['some']]],[' nested ']," items \n"]; $withRefs = []+$noRefs; $wat = $noRefs[0]; $withRefs[0] = &$wat; echo flatten($noRefs); echo flatten($withRefs); Expected result: ---------------- some nested items some nested items Actual result: -------------- some nested items Notice: Array to string conversion ... on line 8 Array nested items ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=75717&edit=1