Sometimes it\'s a good idea to define the constants, it makes it more secure.

<?

//set the variables as required
define (DBHOST, \'mysite.com\');
define (DBUSER, \'username\');
define (DBPASS, \'password\');
define (DBNAME, \'database_name\');

//do not edit this, it connects the script
mysql_connect (DBHOST, DBUSER, DBPASS);
mysql_select_db (DBNAME) OR die (mysql_error ());

?>