Overwriting offset methods of ArrayObject

[Klaus Reimer <k-php@xxxxxxxx>]

Hello,

I just tried to overwrite a method of ArrayObject like this:

  class MyArrayObject extends ArrayObject
  {
      public function offsetGet($key)
      {
          echo "Here I am\n";
          return parent::offsetGet($key);
      }
  }

  $o = new MyArrayObject();
  $o['test'] = 'test';
  echo $o['test'];

I think this should output the text "Here I am" because I have 
overwritten the offsetGet method of ArrayObject which is called if I 
access an array element of this object. But it doesn't. My method is 
simply ignored.

Then I've written a simple Object which implements the ArrayAccess 
interface like the ArrayObject object does. And then I have done the 
same as above but this time I don't extend ArrayObject but my own 
object. This works. My overwrite method is called

I'm confused. Why can't I overwrite the method in ArrayObject? Is this a 
bug? Or are the methods of ArrayObject marked as "final"? But even then 
I must get an "Cannot override final method" error.

Some hints if I misunderstood something? If not I'm going to file a bug 
report.

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