pdo le fou

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

        $this->dbh = new PDO("mysql:dbname={$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);


    }