In your PHP pages you need to create/use a db script to access mysql with a 'non-root' user (one you already created)
You DON'T want to use 'root' to access databases in your PHP. Create a non-root user in mysql and grant permissions.
Most apps have a 'config.inc.php' or some similar script which allows setting up your db connection settings.
create the db:
mysqladmin create mydatabase
enter mysql:
[root@station70 ~]# mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3040 to server version: 4.1.20
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql>
grant permissions:
mysql> grant all on mydatabase.* to nonrootuser@localhost identified by '3d0JYcSoyT4ogrvsMYP19OylGXze/odfjPajCMFl098WDiq';
where mydatabase is the db, nonrootuser is the user, and the string between '' is the password.
Craig