Edit report at http://bugs.php.net/bug.php?id=54408&edit=1
ID: 54408
Comment by: blacknot at gmail dot com
Reported by: hitchiker at mail dot ru
Summary: Unexpected behaviour when using by-reference
iteration
Status: Open
Type: Bug
Package: Arrays related
Operating System: Win 7 x64, 2.6.18
PHP Version: 5.3.6
Block user comment: N
Private report: N
New Comment:
I have similar problem:
$tags = array('iphone', 'apple', 'iPhone 4');
foreach ($tags as &$v) $v = trim($v);
$tags2 = $tags;
foreach ($tags2 as &$a) $a = '*';
print_r($tags);
Result:
Array
(
[0] => iphone
[1] => apple
[2] => *
)
Previous Comments:
------------------------------------------------------------------------
[2011-04-08 13:10:27] hitchiker at mail dot ru
I was sure that arrays are passed to functions by value, not by
reference. It looks like by-reference iteration changes array not only
isnide foreach statement, but array remains changed even after
iteration.
------------------------------------------------------------------------
[2011-03-28 14:35:20] hitchiker at mail dot ru
Description:
------------
I was sure that arrays are passed to functions by value, not by
reference. It looks like after by-reference iteration changes array not
only isnide foreach statement, but array remains changed even after
iteration.
Test script:
---------------
<?php
$a = array(1,2,3,4);
function myf($a,$k){
$a[$k] = 9;
}
foreach ($a as $k => &$v) {
myf($a, $k);
}
//myf($a, 3);
var_dump($a);
die();
Expected result:
----------------
array
0 => int 1
1 => int 2
2 => int 3
3 => int 4
Actual result:
--------------
array
0 => int 9
1 => int 9
2 => int 9
3 => &int 9
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/bug.php?id=54408&edit=1