Edit report at http://bugs.php.net/bug.php?id=52626&edit=1
ID: 52626
Comment by: email at robertdewilde dot nl
Reported by: jay at jay dot cz
Summary: New magic method for procedural calls on object.
Status: Open
Type: Feature/Change Request
Package: Class/Object related
Operating System: *
PHP Version: Irrelevant
Block user comment: N
New Comment:
This comes close to the dynamic proxy class problem. It would really
make sense to fix this, as people want to use more OOP-style code.
Transparent implementing wrapperclasses would be a way to do this, if it
would be possible.
Previous Comments:
------------------------------------------------------------------------
[2010-08-17 18:00:07] jay at jay dot cz
Description:
------------
<?php
$a = Array();
$a['a'] = 'text';
$a['b'] = 15;
$a['c'] = 155.12;
?>
Classic style:
<?php
ksort( $a );
is_array( $a );
?>
Object style:
<?php
$oa = new ObjArray($a); // extends ArrayIterator or ArrayObject
$oa->ksort();
$oa->is_array(); //implemented in ObjArray
?>
But what if :
<?php
$oa = new ObjArray($a); // extends ArrayIterator or ArrayObject
ksort( $oa );
is_array( $oa );
?>
(SplTypes project is dead and I need object types.)
Now it is not possible to control, what functions are executed on
object.
If a language function is used on a object, php would
Variant 1) try to call object function of the same name,
Variant 2) call magic method __callOnObject if exists
Both variants can be implemented together.
Possible problem in variant 1)
Programmer would need to take care, to really implement exact same
structure of parameters, with all optional parameters, elze it would
throw errors on different arguments.
There could by a variant 1a) where, called function doesn't list all
arguments, but passes an array of arguments. But that would make object
calls too different from procedural.
Test script:
---------------
Variant 1)
class ObjArray extends ArrayIterator{
public function is_array( $var ){
return is_array( $this->storage );
}
public function is_object( $var ){
return is_object( $this->storage );
}
}
$obj = new ObjArray( Array( 1, 2 ) );
var_dump( is_array( $obj ) );
var_dump( is_object( $obj ) );
Variant 2)
class ObjArray extends ArrayIterator{
public function __callOnObject( $calledFunction, $params ){
switch $calledFunction {
case "is_array":
return $this->is_array( $params[0] );
break;
case "is_object":
return $this->is_object( $params[0] );
break;
default:
return $calledFunction( insert_params_irrelevant_how( $params )
);
}
}
public function is_array( $var ){
return is_array( $this->storage );
}
public function is_object( $var ){
return is_object( $this->storage );
}
}
$obj = new ObjArray( Array( 1, 2 ) );
var_dump( is_array( $obj ) );
var_dump( is_object( $obj ) );
Expected result:
----------------
Variant 1)
//$obj = new ObjArray( Array( 1, 2 ) );
//var_dump( is_array( $obj ) );
//should translate to var_dump( $obj->is_array( $obj ) );
bool(true)
//var_dump( is_object( $obj ) );
//should translate to var_dump( $obj->is_object( $obj ) );
bool(false)
Variant 2)
//$obj = new ObjArray( Array( 1, 2 ) );
//var_dump( is_array( $obj ) );
//should translate to var_dump( $obj->__callOnObject( "is_array", Array(
$obj ) ) );
//swith/case finds function is_array and calls $obj->is_array( $obj );
bool(true)
//var_dump( is_object( $obj ) );
//should translate to var_dump( $obj->__callOnObject( "is_object",
Array( $obj ) ) );
//swith/case finds function is_object and calls $obj->is_object( $obj
);
bool(false)
Actual result:
--------------
//$obj = new ObjArray( Array( 1, 2 ) );
//var_dump( is_array( $obj ) );
bool(false)
//var_dump( is_object( $obj ) );
bool(true)
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/bug.php?id=52626&edit=1
