BoggleSolver is a small PHP library I wrote that solves Boggle. It wrote it for fun, mostly, though also because I wanted to finally (publicly) release something that utilized Composer and PHPUnit.
Try It Out
If you like you can try it out here. Enter a 3x3 or 4x4 Boggle board. Spaces and newlines aren't required, but you can put them in if you want.