Tutorial Basic Database Connection, Random Query, Display Result

define ('HOSTNAME', 'localhost');
define ('USERNAME', 'username');
define ('PASSWORD', 'password');
define ('DATABASE_NAME', 'recommendations');

$db = mysql_connect(HOSTNAME, USERNAME, PASSWORD) or die ('I cannot connect to MySQL.');

mysql_select_db(DATABASE_NAME);

$query = "SELECT testimonial,author FROM recommendations WHERE 1 ORDER by rand() LIMIT 1";

$result =