Edit report at https://bugs.php.net/bug.php?id=46128&edit=1
ID: 46128
Comment by: shabazzk at gmail dot com
Reported by: 131 dot php at cloudyks dot org
Summary: Magic function __cast($to)
Status: Open
Type: Feature/Change Request
Package: Feature/Change Request
Operating System: Linux
PHP Version: 5.2.6
Block user comment: N
Private report: N
New Comment:
My suggestion is to replace __cast($to) with __toObject($object) (or even
__toSelf($object)). That way, we have a magic method for each type to cast to,
and we avoid the messy switch/if statements.
Previous Comments:
------------------------------------------------------------------------
[2012-09-05 21:01:02] maciej dot sz at gmail dot com
I think we all need this badly. It just suits the direction in which the 5.4 is going.
Regarding same functionality I think it is worth nothing that the conversion to boolean should be
implicit. Otherwise such code could not work:
<?php
function check($response) {
if ( ! $response ) die('error');
}
$resp = new Response();
check($resp->isSuccessful());
check($resp); // this would fail without the cast if the conversion was explicit
?>
------------------------------------------------------------------------
[2012-09-04 14:18:13] qfox at ya dot ru
WHEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEN?!!
There was 3 years to patch sources!
------------------------------------------------------------------------
[2011-01-20 22:54:12] neoegm at hotmail dot com
This would be very useful in order to be able to define a specific evaluation method for an object
as a boolean, to, for example, simplify if-switches, so you can just do:
if ($obj)
{
//...
}
Here an example of a class which toggles its own value each time it's evaluated as a boolean:
class ToggleObj
{
var $val = FALSE;
function __toBool()
{
$ret = $this->val;
$this->val = !$ret;
return $ret;
}
}
$obj = new ToggleObj;
if ($obj)
{
//Does not enter
}
if ($obj)
{
//Now it does
}
Or going further, to make even table rows highlighted:
foreach ($rows as $row)
{
?>
<tr class="<?=$obj?"":"highlighted"?>">
<td><?=$row?></td>
</tr>
<?php
}
Thanks.
NeoEGM
http://www.neoegm.com/
------------------------------------------------------------------------
[2009-03-28 12:41:30] andrea at 3site dot it
I wonder why you guys do not implement in core the PECL php_operator which would make code style and
life much easier.
I cannot imagine a Number class which needs (int)$obj for every single operation.
Please do not get me wrong, __cast is a good idea, but it covers only explicit cases while every
other decent language (C#, Java, Python) allows developer to implement implic cast behavior as well.
This, in PHP 5.3, would be excellent (but probaly an illusion thou).
Regards
------------------------------------------------------------------------
[2009-02-06 00:11:19] rayro at gmx dot de
This is such a nice Implementation and very useful, but i prefer to add the methods __toBool,
__toInt and __toArray rather than __cast, stay tuned with PHP's other magic methods..
I dont agree fully with that post in feature request #38508 from helly. If that'll be the way,
why did the decision for magic methods?
Isnt that all complex although? ^^
We know, but in my eyes (and many others), i think that these magically stuff is one of the top key
features for php. And none of these features will become critism i think. If not needed, just dont
use them!
The additional goody __toInvoke() introduced in 5_3 is a such nice addition for developing
"quick gets" based on nested object sets:
<?php
$magazine(3)->getArticles();
// old way
$magazine->getArticle($magazine->useMagazine(3));
?>
This helper is a "backdoor" like way to enable PHP to fully write nested Objects like in
Javascript. And my opinion for that: I LIKE THIS :)
I think this is a very very discussable topic to the changes for 5_3 or 6_0 beside the wanted
support for traditional type hinting and utf8!
thanks
------------------------------------------------------------------------
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