#42850 [NEW]: array_walk_recursive() leaves references
From: ltaupiac at lfdj dot com
Operating system: windows/solaris
PHP version: 5.2.4
PHP Bug Type: Arrays related
Bug description: array_walk_recursive() leaves references
Description:
------------
I have to reopen this bug http://bugs.php.net/bug.php?id=42655 because it
was incorrectly closed and tony2001 doesn't seem to receive email.
Here Copy/paste email i send him.
This is not the same bug.
In #34982, an array is modified outside the function func() that call
array_walk_recursive. This bug doesn't exist anymore in 5.2.4
The bug i report is when calling array_walk_recursive on an array
(callback function doesn't even have reference & for array input and does
nothing).
Original array shouldn't be modified, but if you var_dump it, you can see
reference on subarray
[0]=> &array(1)
instead of
[0]=> array(1)
The array shouldn't have been modified but array_walk_recursive leaves
references.
This can cause trouble, eg you cant duplicate the original array anymore.
Look at following example
$data = array ('key1' => 'val1', array('key2' =>
'val2'));
function foo($item, $key) {}; // dumb callback function
var_dump($data);
array_walk_recursive($data, 'foo');
$data2 = $data; // Duplicate array
$data2[0] = 'altered'; // Alter copy
var_dump($data);
var_dump($data2);
array(2) {
["key1"]=> string(4) "val1"
[0]=> &string(5) "bingo"
}
array(2) {
["key1"]=> string(4) "val1"
[0]=> &string(5) "bingo"
}
both $data and $data2 are altered;
Reproduce code:
---------------
$data = array ('key1' => 'val1', array('key2' =>
'val2'));
function dumb($i, $k){}
var_dump($data);
array_walk_recursive($data,'foo');
// Double check the [0]=>&array(1) in actual result
var_dump($data);
Expected result:
----------------
Expected result:
----------------
array(2) {
["key1"]=> string(4) "val1"
[0]=> array(1) {
["key2"]=> string(4) "val2"
}
}
array(2) {
["key1"]=> string(4) "val1"
[0]=> array(1) {
["key2"]=> string(4) "val2"
}
}
Actual result:
--------------
Actual result:
--------------
array(2) {
["key1"]=> string(4) "val1"
[0]=> array(1) {
["key2"]=> string(4) "val2"
}
}
array(2) {
["key1"]=> string(4) "val1"
[0]=> &array(1) {
["key2"]=> string(4) "val2"
}
}
--
Edit bug report at http://bugs.php.net/?id=42850&edit=1
--
Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=42850&r=trysnapshot44
Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=42850&r=trysnapshot52
Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=42850&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=42850&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=42850&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=42850&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=42850&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=42850&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=42850&r=support
Expected behavior: http://bugs.php.net/fix.php?id=42850&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=42850&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=42850&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=42850&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=42850&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=42850&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=42850&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=42850&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=42850&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=42850&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=42850&r=mysqlcfg
Thread (5 messages)
- ltaupiac at lfdj dot com