First include extension file with include command.
Then create object of extension. If the parameters are missing, this extension will use defaults from php.ini.
Syntax:
new Smysql([string $host = NULL, string $user = NULL, string $password = NULL[, string $database = NULL]])
Or:
Smysql([string $host = NULL, string $user = NULL, string $password = NULL[, string $database = NULL[, &$object]]])

host

- Server address.

user

- Username.

password

- Password.

database

- Database name. Write create[database name] to create new database.

object

- Empty or undefined object, if it’s mentioned, method won’t return anything and object of extension will be saved in this variable.

Or:

class mySmysql extends Smysql {
protected $host = “Server address”;
protected $user = “Username”;
protected $password = “Password”;
protected $db = “Database name”;
};
$object = new mySmysql();

Return value:
Object of extension.