pdo d'la balle

public function __construct($db_name,$db_user,$db_pass,$db_host)
    {
        $this->db_host = $db_host;
        $this->db_user = $db_user;
        $this->db_pass = $db_pass;
        $this->db_name = $db_name;

        $this->dbh = new PDO(
            "mysql:dbname={$this->db_name};host={$this->db_host}",
            $this->db_user,
            $this->db_pass,
            array(PDO::MYSQL_ATTR_INIT_COMMAND =>'SET NAMES utf8'));

        $this->dbh->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_EXCEPTION);
    }