Buscador y carga de datos

[lucho3540]

<?php
class conexion{
protected $mysqli;
protected $server = "localhost";
protected $user = "wakeshop12_root";
protected $password = "lucho45";
protected $bd = "wakeshop_l45";

public function __construct (){
return $this->mysqli = new mysqli ($this->server, $this->user, $this->password, $this->bd) or exit ("No se pudo realizar la conexión");
}
}
?>

Esos son mis datos, me falta algo en mysqli ???