【PHP】MySQLiクラス

$mysqli = new mysqli();

$host     = "localhost";
$user     = "odaneko";
$password = "odaneko";

$mysqli->connect($host, $user, $password);

$host     = "localhost";
$user     = "odaneko";
$password = "odaneko";

$mysqli = new mysqli($host, $user, $password);

$db_name　= "odaneko";
$mysqli->select_db($db_name);

$mysqli->close();