Bug #71214 [Opn->Csd]: foreach() with inline assignment breaks references
| From: | bugs dot php dot net at ss dot st dot tc | Date: | Thu, 24 Dec 2015 19:52:39 +0000 |
| Subject: | Bug #71214 [Opn->Csd]: foreach() with inline assignment breaks references | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-198199@lists.php.net to get a copy of this message | ||
Edit report at https://bugs.php.net/bug.php?id=71214&edit=1
ID: 71214
User updated by: bugs dot php dot net at ss dot st dot tc
Reported by: bugs dot php dot net at ss dot st dot tc
Summary: foreach() with inline assignment breaks references
-Status: Open
+Status: Closed
Type: Bug
Package: Scripting Engine problem
Operating System: Linux, OSX
PHP Version: 7.0.1
Block user comment: N
Private report: N
New Comment:
(sorry, wrong test script, closing)
Previous Comments:
------------------------------------------------------------------------
[2015-12-24 19:49:06] bugs dot php dot net at ss dot st dot tc
Description:
------------
I believe both PHP 5.6 and 7 have bugs, but also they behave differently.
Tested on PHP 5.6.12, 5.6.16, 7.0.0, 7.0.1.
Test script:
---------------
<?php
# source array that we'll reference to later
$source = [ 'subarray' => ['item' => 'old value ---'] ];
# $ref1 is a reference to $source, assigned right in the foreach()
foreach ( $ref1 = $source as &$subarray ) {
$subarray['item'] = 'NEW value';
echo $subarray['item'], PHP_EOL;
echo $ref1['subarray']['item'], PHP_EOL;
}
echo PHP_EOL;
# $ref2 is a "normal" reference to $source
$ref2 = $source;
foreach ( $ref2 as &$subarray ) {
$subarray['item'] = 'NEW value';
echo $subarray['item'], PHP_EOL;
echo $ref2['subarray']['item'], PHP_EOL;
}
echo PHP_EOL;
########################################
# similar to $source array, but done using a function
function getSource() {
return [ 'subarray' => ['item' => 'old value ---'] ];
}
# $ref3 is a reference to a result of getSource(), assigned right in the foreach()
foreach ( $ref3 = getSource() as &$subarray ) {
$subarray['item'] = 'NEW value';
echo $subarray['item'], PHP_EOL;
echo $ref3['subarray']['item'], PHP_EOL;
}
echo PHP_EOL;
# $ref4 is a "normal" reference to a result of getSource()
$ref4 = getSource();
foreach ( $ref4 as &$subarray ) {
$subarray['item'] = 'NEW value';
echo $subarray['item'], PHP_EOL;
echo $ref3['subarray']['item'], PHP_EOL;
}
Expected result:
----------------
both PHP 5 and 7:
NEW value
NEW value
NEW value
NEW value
NEW value
NEW value
NEW value
NEW value
Actual result:
--------------
PHP 7:
NEW value
old value ---
NEW value
NEW value
NEW value
old value ---
NEW value
old value ---
PHP 5:
NEW value
old value ---
NEW value
NEW value
NEW value
NEW value
NEW value
NEW value
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=71214&edit=1