#34053 [Opn->Bgs]: Objects in array don't behave as expected when passed by value

[sniper]

 ID:               34053
 Updated by:       [EMAIL PROTECTED]
 Reported By:      davelo36net at netscape dot net
-Status:           Open
+Status:           Bogus
 Bug Type:         Arrays related
 Operating System: Win XP SP2
 PHP Version:      5.0.4
 New Comment:

Sorry, but your problem does not imply a bug in PHP itself.  For a
list of more appropriate places to ask for help using PHP, please
visit http://www.php.net/support.php as this bug system is not the
appropriate forum for asking support questions.  Due to the volume
of reports we can not explain in detail here why your report is not
a bug.  The support channels will be able to provide an explanation
for you.

Thank you for your interest in PHP.




Previous Comments:
------------------------------------------------------------------------

[2005-08-09 19:19:36] davelo36net at netscape dot net

Description:
------------
When one passes an array containing fundamental data types (ie strings,
numbers, etc.) by value into a function that then modifies the value of
said elements in its scope, the values of the array does not change in
the scope of the calling procedure. However, when one passes an array
containing user defined classes into a function that modifies the
values of the objects in the array, the values of the objects in the
array changes when the script returns to the calling procedure.

A workaround is possible by serializing the array before the function
that modifies the array locally is called and unserialing the array
after the function is called, but that is wasteful of CPU resources
compared to just giving the function a true local copy of the array and
its elements (which should use about the same amount of memory as the
serialization workaround).

Reproduce code:
---------------
<?php
class foo
{
        public $x;
        public function __construct($x)
        {
                $this->x=$x;
        }
}

function bar($x)
{
        foreach($x as $y)
                $y->x++;
}

$array = array(new foo(1), new foo(2), new foo(3));
bar($array);
print_r($array);
?>

Expected result:
----------------
Array
(
    [0] => foo Object
        (
            [x] => 1
        )

    [1] => foo Object
        (
            [x] => 2
        )

    [2] => foo Object
        (
            [x] => 3
        )

)

Actual result:
--------------
Array
(
    [0] => foo Object
        (
            [x] => 2
        )

    [1] => foo Object
        (
            [x] => 3
        )

    [2] => foo Object
        (
            [x] => 4
        )

)


------------------------------------------------------------------------


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