db.php

<?php
/*
 IM - Infrastructure Manager
 Copyright (C) 2011 - GRyCAP - Universitat Politecnica de Valencia

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

require 'config.php';

require_once 'db_sqlite.php';
require_once 'db_mysql.php';

$url = parse_url($im_db);

if (array_key_exists('scheme', $url)) {
    if ($url['scheme'] == "mysql") {
        class IMDB extends IMDBMySQL
        {

        }
    } else {
        class IMDB extends IMDBSQLite3
        {

        }
    }
} else {
    class IMDB extends IMDBSQLite3
    {

    }
}

class RecipesDB extends IMDB
{
    function __construct()
    {
        include 'config.php';
        $this->open($recipes_db);
    }
}
?>