#33422 [Opn->Bgs]: array_diff_assoc behaving different in PHP5 and PHP 4.3
| From: | fjortiz at comunet dot es | Date: | Tue, 21 Jun 2005 15:09:38 +0000 |
| Subject: | #33422 [Opn->Bgs]: array_diff_assoc behaving different in PHP5 and PHP 4.3 | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-80772@lists.php.net to get a copy of this message | ||
ID: 33422
User updated by: fjortiz at comunet dot es
Reported By: fjortiz at comunet dot es
-Status: Open
+Status: Bogus
Bug Type: Arrays related
Operating System: Win2K Server
PHP Version: 5.0.4
New Comment:
ok bogus then, but doesn't solve my problem. Thanks :-)
Previous Comments:
------------------------------------------------------------------------
[2005-06-21 17:07:33] fjortiz at comunet dot es
ok, me again, I saw the
"array_diff_assoc() requires that both the key and the value pairs
match."
so I guess PHP5 now considers both new Foo(5) objects as different
(PHP4.3 does bitwise comparison) so they are included in result array.
Still I find annoying that this breaks compatibility in some apps (it
certainly does in mine...).
Any suggestions? Isn't there anything like "operator==" in C++, so I
can use array_diff_assoc safely (same key&value)?
"PHP does not support operator overloading"
arrrg
------------------------------------------------------------------------
[2005-06-21 17:00:30] tony2001@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
This is expected behaviour, because objects in PHP5 are compared as
descriptors, i.e. even two identical objects of the same class are
different.
------------------------------------------------------------------------
[2005-06-21 16:56:10] fjortiz at comunet dot es
Description:
------------
array_diff_assoc in PHP5 seems to ignore items whose values are
objects. This should be irrelevant as this function takes only keys as
reference for comparison. See code.
Reproduce code:
---------------
class Foo {
var $dato;
function Foo($dato) {
$this->dato = $dato;
}
}
$array1 = array ("a" => new Foo(5), "b" => new Foo(2), "c" =>
"azul",
"rojo");
$array2 = array ("a" => new Foo(5), "amarillo", "rojo");
$result = array_diff_assoc ($array1, $array2);
print_r($result);
Expected result:
----------------
PHP 4.3.8:
Output:
Array
(
[b] => foo Object
(
[dato] => 2
)
[c] => azul
[0] => rojo
)
Correct.
The same code with PHP 5.0.4:
Output:
Array
(
[a] => Foo Object
(
[dato] => 5
)
[b] => Foo Object
(
[dato] => 2
)
[c] => azul
[0] => rojo
)
which is not the same, and not correct in PHP5: [a] item should not be
there.
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=33422&edit=1