How to install phpmyadmin as a subdomain
If you have installed old version of phpmyadmin on your server or giving you a lot of errors and problems then easiest and quick way to use phpmyadmin is to installed latest version of phpmyadmin on your server as a subdomain.
Go to phpmyadmin website and download latest version on your computer.
Create a subdomain on your server and upload all unzipped files on the subdomain’s root folder.
That’s it. You don’t have to do anything else.