PHP access to MySQL is available but access is restricted to the Pulsant web servers.
PHP provides specific support for MySQL:
$db = mysql_connect($servername, $username, $password);
You will need to set $servername, $username and $password to suit your database as detailed for MySQL
Both mysql_connect and mysql_pconnect should work, but pconnect will provide a persistent connection if required. For more details, have a look at: http://www.php.net/manual/en/ref.mysql.php