How do I connect from php to mySQL using SSL?

This is a simple example.

<?php
$link = mysql_connect('localhost', 'mysql_user', 'mysql_password');
if (!$link) {
    die('Could not connect: ' . mysql_error());
}
echo 'Connected successfully';
mysql_close($link);
?>

See http://us.php.net/function.mysql-connect

Where are the PHP and MySQL hosts (what URLs)?

mgrennan, I want to connect via SSL to secure the transfer of data between the php server and the mysql server. The mysql server is on a remote host.

mgrennan, I will look into that info. I started to make and installed certificates earlier today, but never completed the process. I came across another idea and it seemed to work. I was hoping to confirm the solution: I used this connection:
$conn = mysql_connect("XXX.XXX.XXX.XXXX", "username", "password",true, MYSQL_CLIENT_SSL);
on the remote mysql database I used:
GRANT ALL PRIVILEGES ON *.* TO 'username'@'remoteIP' IDENTIFIED BY 'password' REQUIRE SSL;
It made a connection which I think is SSL, I know of no way to confirm that. I do know that trying to use only $conn = mysql_connect("XXX.XXX.XXX.XXXX", "username", "password") fails. It seemed so simple that I was doubting the SSL connection. And doubting whether the information transferred from the mysql database to the remote php was actually encrypted.  Any thoughts?