Edit report at https://bugs.php.net/bug.php?id=55157&edit=1
ID: 55157
Comment by: gergo at gergoerdosi dot com
Reported by: olav at fwt dot no
Summary: ArrayIterator::offsetUnset(); does not work
correctly
Status: Assigned
Type: Bug
Package: SPL related
Operating System: openSUSE 11.4/Debian 5
PHP Version: Irrelevant
Assigned To: colder
Block user comment: N
Private report: N
New Comment:
Please ignore my comment above. The offsetUnset() method unsets elements using
their index. Changing the code to this gives the expected result (0, 4):
$items = new ArrayObject(array(0, 1, 2, 3, 4));
foreach($items->getArrayCopy() as $item) {
if(in_array($item, array(1, 2, 3))) {
$items->offsetUnset($item);
}
}
var_dump($items->getArrayCopy());
Previous Comments:
------------------------------------------------------------------------
[2011-07-19 15:09:34] gergo at gergoerdosi dot com
I have the same problem, used this code:
$items = new ArrayObject(array(1, 2, 3, 4, 5));
foreach($items as $item) {
if(in_array($item, array(2, 3, 4))) {
$items->offsetUnset($item);
}
}
var_dump($items->getArrayCopy());
Expected result: array(1, 5), actual result: array(1, 3, 5).
------------------------------------------------------------------------
[2011-07-07 07:18:36] j...@php.net
Sorry, I should clarify that the code above gives:
array(1) { [1]=> int(1) }
Whereas you'd probably expect:
array(0) { }
------------------------------------------------------------------------
[2011-07-07 07:17:12] j...@php.net
Just to narrow the scope of the bug a bit:
$a = range( 0,9 );
$b = new ArrayIterator( $a );
foreach($b as $k=>$v) {
$b->offsetUnset($k);
}
var_dump($b->getArrayCopy()); // why is 1 still around?
------------------------------------------------------------------------
[2011-07-07 06:52:24] olav at fwt dot no
Description:
------------
ArrayIterator always skips the second element in the array when calling
offsetUnset(); on it while looping through.
Using the key from iterator and unsetting in the actual ArrayObject works as
expected.
Running php 5.3.5 on openSUSE 11.4
Replicated same bug on Debian 5 running PHP 5.2.6-1+lenny9.
php5 is installed as binary on both systems, SPL is builtin package.
Test script:
---------------
<?php
// Create a array range from 0 to 9
$a = new ArrayObject( range( 0,9 ) );
$b = new ArrayIterator( $a );
for ( $b->rewind(); $b->valid(); $b->next() )
{
echo "#{$b->current()} - \r\n";
$b->offsetUnset( $b->key() );
}
?>
Expected result:
----------------
Expected a list of from 0 to 9 echoed out.
Actual result:
--------------
Lists out 0 and then 2-9 leaving index 1 untouched in the original ArrayObject.
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=55157&edit=1
