<?php

class core extends user {

    var $db;

    public function core () {

        $this->db = new database();

    }
}

class module1 extends core {

    public function module1 () {

        $q = "SELECT * FROM user";
        $r = $this->db->getAll($q);

        echo '<pre>';
        print_r($r);
        echo '</pre>';

    }

}

?>