upcasting in php5

adilturbo · 10-30-2008, 06:42 AM

Hello,

i want to translate this code of java to PHP5:

Code:

interface I{
  //...
  abstract void methode1();
}

abstract class A implements I{
  void methode1(){
      methode2();
  }

  abstract void methode2();
}

class C extends A{
  void methode2(){
   //do some...
  }

}

i want to use this this way:

Code:

I i=new A(); //here is implicit upcasting
i.methode1(); //  this methode will implecitely call methode2 of class A

how can i do upcasting in PHP5?

thanks in advance.

darkbolt · 11-02-2008, 11:01 PM

If I'm understanding you right, what you want is something like

PHP Code:



<?php 
class A{ 
   function foo(){ 
       echo('foo'); 
   } 
} 
 
class B extends A{ 
    function foobar(){ 
        parent::foo(); 
        echo('bar'); 
    } 
} 
$i = new B(); 
$i.foobar(); 
?>

Note, not tested, just written off the top of my head as I was reading this. ymmv.

adilturbo · 11-03-2008, 05:57 AM

Hello,

thanks for the replay.

i want to do upcasting. in java or c++ if class A inherits from class B this statement is true:

B b= new A();

i do not know how to do it in PHP.

darkbolt · 11-03-2008, 01:11 PM

PHP is dynamically typed, so you don't have to declare that it is a B even though you're creating an A, just simply create the A

PHP Code:



$a = new A();

adilturbo · 11-04-2008, 05:17 AM

Ok thank you so much.

cheers.