Hi,
I suggest reading from page 12 of this document:
http://www.zend.com/engine2/ZendEngine-2.0.pdf
There's an example which matches with your technique....
Regards,
Bastian
Filippo Veneri schrieb:
> Let's begin with a small code snippet:
>
> <code>
>
> class A {
> function A( $selector ) {
> switch( $selector ) {
> case 1: $obj = new A_1(); break;
> case 2: $obj = new A_2(); break;
> ...
> }
> $this = $obj;
> }
> }
>
> class A_1 {
> ...
> }
>
> class A_2 {
> ...
> }
>
> $a = new A(1); // $a is now an instance of A_1
> $a = new A(2); // $a is now an instance of A_2
>
> </code>
>
> I use this trick to implement "polymorphic" objects.
> I just wanted to know what other people think about
> it.
> Is this a "dangerous" technique? (i.e. changes in php
> object model can break programs that use it)
> Is it already in common use?
> Any opinion is welcome.
>
> Thanks
>
> fbv
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