class function problem

[lenerd3000]

i have a functions declared in the other page and a class in another page... is it possible to make the functions become my class's own functions? i want to make a simple core files for my website.

[trq]

<?php

  class a {
    public function foo() {
      echo "this is foo\n";
    }
  }

  class b extends a {
    public function bar() {
      echo "this is bar\n";
    }
  }

  $obj = new b;
  $obj->foo();
  $obj->bar();

?>