Today, i discovered you can’t use phpmyadmin on PHP 5.3.X because a dns issue. If you use PHP 5.3.X, you should follow the steps:

1. Go to hosts file and open with notepad:

2. Remove the comment (#) in front of 127.0.0.1
3. Done! Now you can use phpMyAdmin :)

Another option, you can set 127.0.0.1 instead of localhost from config.inc.php in phpmyadmin.