ID: 51049
Updated by: [email protected]
Reported By: timminn at gmail dot com
-Status: Open
+Status: Bogus
Bug Type: Arrays related
Operating System: Arch Linux 2.6.31
PHP Version: 5.3.1
New Comment:
Reusing a variable that you've used to hold value references in a
foreach loop leads to Bad ThingsĀ. That's why the manual page for
foreach has a big red box recommending that you unset() the variable
after you're done with the loop.
Recent bugs dealing with this include bug #50485, bug #50582 and bug
#48561. This behaviour isn't going to be changed as it would break
backward compatibility.
Closing.
Previous Comments:
------------------------------------------------------------------------
[2010-02-15 05:03:10] timminn at gmail dot com
the bug occurs ONLY WHEN:
MUST BE used in a STRAIGHT MANNER as ARRAY IN OBJECT, as shown in the
sbmitted code,
in other words, if we use
$sa = $o3->a;
and foreach( $sa as $k => & $v ){ ... }
the bug will not occur
------------------------------------------------------------------------
[2010-02-15 04:47:44] timminn at gmail dot com
Description:
------------
if AN ARRAY WITHIN AN OBJECT is used in "a straight manner" in the
foreach() loop, with the references to its values[poor English, see the
SECOND foreach() in the submitted code to understand I mean],
the last value in the array will be REPACED with the second last one
ACCIDENTALLY, WITHOUT ANY ASSIGNMENT OPERATION.
Reproduce code:
---------------
<?php
class myc{ public $a; }
$o3->a = Array( 11, 22 );
//loop ONE
foreach( $o3->a as $k => $v )
echo $v. ' '; //EXPECT 11 22 , CORRECT OUTPUT
echo "\n=========\n";
//loop TWO notice the reference & sign for $v
foreach( $o3->a as $k => & $v )
echo $v. ' '; //EXPECT 11 22 , CORRECT OUTPUT
echo "\n=========\n";
//loop THREE
foreach( $o3->a as $k => $v )
echo $v. ' '; //EXPECT 11 22 , BUT WRONG OUTPUT: 11 11
echo "\n=========\n";
?>
Expected result:
----------------
11 22
11 22
11 22
Actual result:
--------------
11 22
11 22
11 11
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=51049&edit=1
