need help with database.php

[LLAMAvsCOW]

IM working on a adding a membership but i am confused on what there asking me like 'your database' and stuff so please help
any links to help me with this question are always appreciated

<?

/**
 * Connect to the mysql database.
 */
$conn = mysql_connect("localhost", "your_username", "your_password") or die(mysql_error());
mysql_select_db('your_database', $conn) or die(mysql_error());

?>

[djr33]

http://php-mysql-tutorial.com