#14990 [Csd]: array_merge_recursive modifies inputted value
| From: | philip@php.net | Date: | Tue, 12 Nov 2002 10:39:09 +0000 |
| Subject: | #14990 [Csd]: array_merge_recursive modifies inputted value | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-24675@lists.php.net to get a copy of this message | ||
ID: 14990
Updated by: philip@php.net
Reported By: philip@cornado.com
Status: Closed
Bug Type: Arrays related
Operating System: n/a
PHP Version: 4.1.1
New Comment:
It's fixed in CVS and PHP 4.3.0-dev is showing correct bahavior. Will
add documention shortly.
Previous Comments:
------------------------------------------------------------------------
[2002-11-11 22:22:58] mailfrom-bugs.php.net@kopka.net
This annoying Bug is still inside php-4.2.3
------------------------------------------------------------------------
[2002-04-24 11:02:25] andrei@php.net
This bug has been fixed in CVS.
------------------------------------------------------------------------
[2002-01-11 04:32:53] philip@cornado.com
With 3+ parameters, only the first parameter is left untouched. All
others are affected, as demonstrated above with $b.
------------------------------------------------------------------------
[2002-01-11 04:02:21] philip@cornado.com
In Summary:
--------------
array_merge_recursive() modifies the array entered as the second
parameter if the merged arrays have at least one identical stringed
key. It will affect all such duplicate keys, and modify the second
parameter's array as demonstrated below.
Example:
--------------
<?php
$a = array(2 => '2 a', 'foo' => 'foo a','bar' =>
'bar a');
$b = array(2 => '2 b', 'foo' => 'foo b','bar' =>
'bar b');
$c['recursive'] = array_merge_recursive($a,$b);
$c['a'] = $a;
$c['b'] = $b;
print_r($c);
?>
Example output:
---------------
Array
(
[recursive] => Array
(
[0] => 2 a
[foo] => Array
(
[0] => foo a
[1] => foo b
)
[bar] => Array
(
[0] => bar a
[1] => bar b
)
[1] => 2 b
)
[a] => Array
(
[2] => 2 a
[foo] => foo a
[bar] => bar a
)
[b] => Array
(
[2] => 2 b
[foo] => Array
(
[0] => foo b
)
[bar] => Array
(
[0] => bar b
)
)
)
Notes:
----------------
Notice how in $b, keys 'foo' and 'bar' are now arrays when initially
they were not. This behavior exists with all such duplicate stringed
keys. array_merge_recursive() should not directly affect inputted
values. This seems related to bug
#14128.
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=14990&edit=1