Jim Lucas wrote:
> admin wrote:
>> Inside the body of method foo() you can of course use syntax like
>> parent::foo(). But is there a way to call the parent version of
>> obj->foo() outside the class? That kind of syntax is allowed in C++, for
>> example: Aclass a; if (a.Aparent::foo()) ...;
>>
>> Some contrived example to illustrate the point:
>>
>> class AParent {
>> public function foo() { .. }
>> }
>>
>> class A extends AParent {
>> public function foo() {
>> doit($this, __CLASS__, __FUNCTION__);
>> }
>> }
>>
>> function doit($obj, $classname, $funcname) {
>> if (...)
>> // $obj->classname_parent::$funcname();
>> }
>>
>>
>> Thanks.
>>
>
> To use Richards example, but with a little different twist for accessing
> the parent methods/properties
>
> class A
> {
> public __construct()
> {
> // ...
> }
> public function foo ()
> {
> // ...
> }
> }
>
> class B extends A {
> // Constructor
> public function __construct ()
> {
> parent::__construct();
> }
> }
>
>
> // And then...
>
> $b = new B();
> $b->foo();
>
>
> This will bring all methods/properties from class A into class B.
both methods & properties of the parent (class A) are available assuming they
are public or protected - if you don't call the parent ctor the only
thing your missing is whatever initialization of data and/or property values
(etc)
would have been done by the parent ctor.
class A {
public function foo() {echo "achoo";}
}
class B extends A {}
$b = new B;
$b->foo();
it is quite normal to call parent::__construct(); in the subclass' ctor but it's
not required to make methods/properties available and I don't see what baring
it has on the OP's question.
another solution for the OP might be (although I think it goes against all
design principles):
class A {
function foo() {
echo "achoo\n";
}
}
class B extends A {
function foo() {
echo "cough\n";
}
function __call($meth, $args) {
$func = array(parent, strtolower(str_replace("parent","", $meth)));
if (is_callable($func))
return call_user_func_array($func, $args);
}
}
$b = new B;
$b->foo();
$b->parentFoo();
>
> You can choose to override class A methods/properties when you define
> class B.
> But the idea here is that only need to write the methods/properties once
> in the parent class,
> then you can extend your class with class A and have all the
> methods/properties available to you
> within your current class.
>
> It is good to practice the DRY principle here.
>
>
>
> Note: Richard Heyes thanks for the code snippet
>
>
>
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
