Edit report at https://bugs.php.net/bug.php?id=55852&edit=1
ID: 55852
Updated by: johan...@php.net
Reported by: hyponiq at gmail dot com
Summary: Feature Request: __cast magic function
-Status: Open
+Status: Bogus
Type: Feature/Change Request
Package: Class/Object related
Operating System: Windows 7 Ultimate
PHP Version: 5.3.8
Block user comment: N
Private report: N
New Comment:
This is not possible as there are too many places where it isn't cleatr which
types should be used.
Let
$a = new Object();
$b = new Object();
Where
Object implements your __cast() method
Then do
$c = $a + $b;
What type should be requested? - The + operator can work with integers, floats
and arays.
Or do
$d = str_replace($a, $b, "some text");
what should be used then? - str_replace can work on strings and arrays.
We have __toString for everything else use specific methids.
$e = $a->toInt() + $b->toInt();
Previous Comments:
------------------------------------------------------------------------
[2011-10-05 10:35:26] hyponiq at gmail dot com
Description:
------------
I think it'd be a useful tool to add a __cast($to) magic function to the
Classes and Objects category of PHP syntax. What said function would do is
allow the programmer to specify the return values of casting a user-land object
into one of the built-in data types. I.E. using (int) MyObject would invoke the
__cast() method passing it the 'int' type. In such a case, the programmer could
then specify what is returned when cast to, per se, int's.
<?php
class MyObject {
public $myValue = null;
public function __construct($value) {
$this->myValue = $value;
}
public function __cast($to = 'string') {
switch ($to) {
case 'string':
return 'The value of myValue is: ' . (string) $this->myValue;
case 'int':
return strlen($this->myValue);
}
}
}
$myObject = new MyObject('I am a string');
print (int) $myObject; // Output: 13
?>
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Edit this bug report at https://bugs.php.net/bug.php?id=55852&edit=1
