Roughly 10-20 hours Total.
Anything that can run an Apache Server + Use SQLite.
Because my Senior Project was using an SQLite Database and there was no native support for a phpmyadmin which meant I had to spend most of my time in an SQL console typing in SQL queries in order to actually manage and maintain a Database.
So in order for me to more easily add stuff I created a few simple PHP pages to help me do just that. It started off as just simple tools such as Adding an Item, but sooner rather than later I ended up creating a whole system of tools and a Map Editor.