#36786 [Bgs]: empty() on an element of ArrayObject
| From: | davd dot nqd at gmail dot com | Date: | Sun, 19 Mar 2006 19:31:18 +0000 |
| Subject: | #36786 [Bgs]: empty() on an element of ArrayObject | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-94566@lists.php.net to get a copy of this message | ||
ID: 36786
User updated by: davd dot nqd at gmail dot com
Reported By: davd dot nqd at gmail dot com
Status: Bogus
Bug Type: SPL related
Operating System: *
PHP Version: 5.*
Assigned To: helly
New Comment:
Actually, ArrayAccess seems to be able to handle this, the following
code will work as expected:
<?php
class demo implements ArrayAccess {
public $array;
function __construct()
{
$this->array = array('index' => '', 'index2' =>
'not empty');
}
function offsetExists($offset)
{
if (isset($this->array[$offset])) return true;
else return false;
}
function offsetGet($offset)
{
if ($this->offsetExists($offset)) return
$this->array[$offset];
else return (false);
}
function offsetSet($offset, $value)
{
if ($offset) $this->array[$offset] = $value;
else $this->array[] = $value;
}
function offsetUnset($offset)
{
unset ($this->array[$offset]);
}
}
$arrayObject = new demo();
if (empty($arrayObject['index'])) {
echo '1';
} else {
echo '0';
}
if (empty($arrayObject['index2'])) {
echo '1';
} else {
echo '0';
}
?>
Previous Comments:
------------------------------------------------------------------------
[2006-03-19 14:54:57] helly@php.net
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to
report
a bug at http://bugs.php.net/how-to-report.php
Actually the problem is that interface ArrayAccess was not designed to
support this. In fact it was designed to only check for existance
(neither isset nor empty).
Eventually we could change the interface in PHP 6 or invent some
workaround for SPL's ArrayObject/ArrayIterator later.
In case you always need empty you can overwrite offsetExists.
------------------------------------------------------------------------
[2006-03-19 11:40:14] davd dot nqd at gmail dot com
Oops, I made a typo.
Instead of ".. returns true", I meant "... returns false".
------------------------------------------------------------------------
[2006-03-19 11:37:29] davd dot nqd at gmail dot com
Description:
------------
When applying empty() to an element of an ArrayObject which is the
empty string, empty() returns true. But, the manual for empty() states
that "an empty string" is considered empty.
Note: I tried to reproduce this bug using a custom implementation of
ArrayAccess which worked as expected.
Reproduce code:
---------------
<?php
$array = array('index' => '');
$arrayObject = new ArrayObject($array);
if (empty($arrayObject['index'])) {
echo 'empty';
} else {
echo 'not empty';
}
?>
Expected result:
----------------
empty
Actual result:
--------------
not empty
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=36786&edit=1