Mini Shell

<?php

require_once 'Configuration.php';

abstract class Model {

    private static $db;     // Static db PDO object (shared)

    // Execute SQL query
    protected function runQuery($sql, $params = null) {
        if ($params == null) {
            $result = self::getdb()->query($sql);   // exécution directe
        }
        else {
            $result = self::getdb()->prepare($sql); // requête préparée
            $result->execute($params);
        }
        return $result;
    }

    // Return db PDO connection object
    private static function getdb() {
        if (self::$db === null) {
            $dsn = Configuration::get("dsn");
            $login = Configuration::get("login");
            $passwd = Configuration::get("passwd");
            // Création de la connexion
            self::$db = new PDO($dsn, $login, $passwd, 
                    array(PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION));
        }
        return self::$db;
    }
}