-> Membre.class.php
<?php
// reste de la class ...

require_once('DB.class.php');

$this->DB = new DB();

$this->DB->query('INSERT INTO membres (nom, prenom, pw, rank, rank_name, mail, location, actif, birthday, lastvisit, regts) VALUES ("'.$r_arr['nom'].'", "'.$r_arr['prenom'].'", "'.$r_arr['pw'].'", "'.$r_arr['rank'].'", "'.$r_arr['rank_name'].'", "'.$r_arr['mail'].'", "'.$r_arr['location'].'", "'.$r_arr['actif'].'", "'.$r_arr['birthday'].'", "'.$r_arr['lastvisit'].'", "'.$r_arr['regts'].'"');
?>

-> DB.class.php
<?

public function __construct(){

        require_once('config.inc.php');

        $this->host = $cfg['db']['host'];
        $this->user = $cfg['db']['user'];
        $this->pass = $cfg['db']['pass'];
        $this->name = $cfg['db']['name'];

        unset($cfg);

        $this->link = mysql_connect($this->host, $this->user, $this->pass);

        if(!$this->link && $this->debug){
            throw new MySQLExeption('<strong>DB::connect :</strong> Une erreur est survenue lors de la connexion &agrave; la base de donn&ecute;es ...<br />');
            return false;
        }

        $msd = mysql_select_db($this->name,$this->link);

        if (!$msd && $this->debug){
            throw new MySQLExeption('<strong>DB::db_select :</strong> Une erreur est survenue lors de la selection de la base ...<br />');
            return false;
        }

        unset($msd);

        return true;
    }

public function query($req){
        $res = mysql_query($req,$this->link);
        $this->nreq++;
        return $res;
    }
?>