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adilturbo 10-30-2008 06:42 AM
upcasting in php5
 
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.


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