PhpMyAdmin is powerfull but the GUI is messy. Adminer is a lightweight alternative. You have to download the files and place them in your folder.
# sudo apt-get isntall adminer
# sudo ln -s /usr/share/adminer/ adminer
The first line will install the files. They are saved in /usr/share/adminer. Therefore we need a symbolic link to the folder, which is made in the second line of code.