First of all add the rpmforge repository to user system. Explained here

Now :

[root@localhost ~]# yum install phpmyadmin

[root@localhost html]# vi /usr/share/phpmyadmin/config.inc.php

And add the blowfish secret,
$cfg['blowfish_secret'] = 'a8b7dafdferHJHJ^&U^45776TIUuiYc6d';

http://127.0.0.1/phpmyadmin/

Now edit the phpmyadmin configuration file for apache

[root@eastonch /]# vi /etc/httpd/conf.d/phpmyadmin.conf


  Order Deny,Allow
  ...

First of all add the rpmforge repository to user system. Explained here

Now :

[root@localhost ~]# yum install phpmyadmin

[root@localhost html]# vi /usr/share/phpmyadmin/config.inc.php

And add the blowfish secret,
$cfg['blowfish_secret'] = 'a8b7dafdferHJHJ^&U^45776TIUuiYc6d';

http://127.0.0.1/phpmyadmin/

Now edit the phpmyadmin configuration file for apache

[root@eastonch /]# vi /etc/httpd/conf.d/phpmyadmin.conf


  Order Deny,Allow
  ...