Copying an Object passes Object by Reference?!

[jerrygarciuh]

I discovered this by accident today. How should I get an object's
data into another variable and make modifications without affecting
the original object?

// Example of problem

// here is x, a simple object
class O {}
$x = new O;
$x->name = "old";
$x->sex = "male";

O Object
(
[name] =old
[sex] =male
)
// moving x to y

$y = $x;

// modifying y alters x

$y->sex = "female";
$y->name = "new";

print_r($x);

O Object
(
[name] =new


[sex] =female
)

[Rik Wasmus]

Re: Copying an Object passes Object by Reference?!

On Fri, 18 Jan 2008 18:57:19 +0100, jerrygarciuh <jerrygarciuh@g mail.com>
wrote:

I discovered this by accident today. How should I get an object's
data into another variable and make modifications without affecting
the original object?

Since PHP5, objects are always passed (& assigned) by reference. Use the
'clone' keyword if you need a clone, and you can even use the magic
__clone() method to alter an object on clone (possibly clone objects in
the properties too etc.).
--
Rik Wasmus

[Michael Fesser]

Re: Copying an Object passes Object by Reference?!

..oO(jerrygarci uh)

>I discovered this by accident today. How should I get an object's
>data into another variable and make modifications without affecting
>the original object?

Clone it:

$foo = new Object();
$bar = clone $foo;

http://www.php.net/manual/en/language.oop5.cloning.php

Micha

[jerrygarciuh]

Re: Copying an Object passes Object by Reference?!

On Jan 18, 12:14 pm, Michael Fesser <neti...@gmx.de wrote:

.oO(jerrygarciu h)
>

I discovered this by accident today. How should I get an object's
data into another variable and make modifications without affecting
the original object?

>
Clone it:
>
$foo = new Object();
$bar = clone $foo;
>

http://www.php.net/manual/en/language.oop5.cloning.php

>
Micha

Thanks Micha!

JG

[jerrygarciuh]

Re: Copying an Object passes Object by Reference?!

On Jan 18, 12:13 pm, "Rik Wasmus" <luiheidsgoe... @hotmail.comwro te:

On Fri, 18 Jan 2008 18:57:19 +0100, jerrygarciuh <jerrygarc...@g mail.com>
wrote:
>

I discovered this by accident today. How should I get an object's
data into another variable and make modifications without affecting
the original object?

>
Since PHP5, objects are always passed (& assigned) by reference. Use the
'clone' keyword if you need a clone, and you can even use the magic
__clone() method to alter an object on clone (possibly clone objects in
the properties too etc.).
--
Rik Wasmus

Thanks Rik!

JG