$user = 'root';
$password = 'root';
$db = 'mydb';
$host = 'localhost';

$success = mysqli_connect(
   $host,
   $user,
   $password,
   $db

);
  if(mysqli_connect_errno())
  {
	echo 'Ошибка в подключении к базе данных ('.mysqli_connect_errno().'): '.mysqli_connect_error();
	exit();
}else{
echo 'connected';
}
//вывод

$sql = "SELECT * FROM mytable1";
      $result = mysqli_query($success, $sql);

      echo '<pre>';
      var_dump($result);
      echo '</pre>';