Edit report at https://bugs.php.net/bug.php?id=63268&edit=1
ID: 63268
Comment by: xianrenb at gmail dot com
Reported by: klaussantana at gmail dot com
Summary: Scalar Casting
Status: Open
Type: Feature/Change Request
Package: Unknown/Other Function
Operating System: Any
PHP Version: Irrelevant
Block user comment: N
Private report: N
New Comment:
I think there are scripts relying on the default behavior of scalar type
casting.
Changing the default behavior could break those scripts.
If one wants to do something similar, he could write and use his own
classes/methods instead of using scalar types and type casting.
Using custom classes/methods are much more flexible as classes could be
extended.
On the other hand, introducing the new feature would make debugging much more
difficult.
PHP should continue the OO way, but not return to the non-OO way.
I would strongly recommend not implementing this feature.
Previous Comments:
------------------------------------------------------------------------
[2012-10-12 21:47:09] klaussantana at gmail dot com
And then something like this:
register_casting_behavior( 'object', 'string', '::__toString' );
register_casting_behavior( 'object', 'int', '::__toInt' );
$S = new String('Teste');
echo $S; // will call __toString() method within $S and return the value...
echo $S +1; // will call __toInt() method within $S and return the value...
Callbacks would work somehow like this:
* When you specify an array with 1st parameter as a class name string and 2nd
as constructor it will instantiate the object. Else it will invoke the static
method.
* When you specify an array with 1st parameter as an object and 2nd as any
method it will invoke that method within that object
* If the origin type is "object" and the callback is a string that starts with
"::" it will call the remaining callback string as a method in the object being
casted as the destination
type.
------------------------------------------------------------------------
[2012-10-12 21:20:23] klaussantana at gmail dot com
Note that it'll be automatically chainable because the result of ->toLower() is
a
string and it will cast as an object...
And you'll can also do something like this:
echo 'My String'->toLower();
Just suggestions.. comment.
------------------------------------------------------------------------
[2012-10-12 21:16:36] klaussantana at gmail dot com
Description:
------------
It would be nice if we can control the casting behavior of any type to another.
Like a function like this:
register_casting_behavior( $from, $to, $callback_function );
So when you do this:
register_casting_behavior( 'int', 'bool', 'int2bool' );
$X = (bool) 1;
It will call int2bool( 1 ) and so...
Then....
Test script:
---------------
register_casting_behavior( 'string', 'object', array( 'String', '__construct' )
);
class String
{
protected $value = null;
public function __construct( $String )
{
$this->value = $String;
return $this;
}
public function toLower()
{
return strtolower($this->value);
}
public function underline()
{
return "<span style='text-decoration: underline;'>{$this->value}</span>";
}
}
$S = 'My String';
echo $S->toLower()->underline();
// will output: <span style='text-decoration: underline;'>my string</span>
------------------------------------------------------------------------
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Edit this bug report at https://bugs.php.net/bug.php?id=63268&edit=1
