<?php
    class Scandinavia {
        function get_countries() {
            return array('Norway', 'Sweden', 'Denmark', 'Finland');
        }
    }

    class Europe extends Scandinavia {
        function get_countries($area) {
            if ($area == "Scandinavia") {
                return Scandinavia::get_countries();
            }
        }
    }
?>

Strict Standards: Declaration of Europe::get_countries() should be compatible with that of Scandinavia::get_countries() in - on line 14