or, even better: locate the file in directory /etc/httpd/conf.d/phpmyadmin.conf/ and uncomment these lines to only give access on the local system to phpmyadmin, and leave the users from outside with no access to phpmyadmin
Code:
<Directory "/usr/share/phpmyadmin"> Order Deny,Allow Deny from all Allow from 127.0.0.1 </Directory>