Bug #14990 Updated: array_merge_recursive modifies inputted value
| From: | philip at cornado dot com | Date: | Fri, 11 Jan 2002 09:32:54 +0000 |
| Subject: | Bug #14990 Updated: array_merge_recursive modifies inputted value | ||
| References: | 1 | Groups: | php.dev |
| Request: | Send a blank email to php-dev+get-76593@lists.php.net to get a copy of this message | ||
ID: 14990
User updated by: philip@cornado.com
Reported By: philip@cornado.com
Status: Open
Bug Type: Arrays related
Operating System: n/a
PHP Version: 4.1.1
New Comment:
With 3+ parameters, only the first parameter is left untouched. All
others are affected, as demonstrated above with $b.
Previous Comments:
------------------------------------------------------------------------
[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