Question

I have the following setup:

abstract class AParentLy{
   private $a;
   private $b;

   function foo(){
      foreach(get_class_vars(get_called_class()) as $name => $value){
         echo "$name holds $value";
      }
   }
}

class ChildClass extends AParentLy{
   protected $c='c';
   protected $d='d';
}

$object = new ChildClass();
$object->foo();

What I want it to output is:

c holds c
d holds d

What it does output is:

c holds c
d holds d
a holds
b holds

The get_called_class() method correctly outputs “ChildClass”

I’m fairly new to class inheritance in PHP and from what I can gather the problem lies somewhere in the so scope. But I can’t figure out how to make it work.

(The somewhat questionable solution would be to just go ahead and add a great big if($name!=’a’ && $name!=’b’ …~ into the mix. But I’m sure there must be another, more sane and stable way to do this)

Answer 1

Had another go at the whole experiment this question was a part of.

The eventual solution (just in case anyone stumbles over this and has the same problem) I came to was to create the following method within the parent class:

function get_properties(){
    foreach(get_class_vars(get_called_class()) as $name => $value){
        if(!in_array($name,array_keys(get_class_vars('Parent')))){
            $r[$name]=$this->$name;
        }   
    }
    return $r;
}

with this you get every parameter (and their value) of the child class without any of the parent class. You’ll have to change the function a bit if you ever change the class name, but at least for me this was a workable solution.