I have to do one project for my thesis involving Artificail intelligence , collaborative filtering and machine learning methods.

I only know PHP/mysq/JS

and there is not much AI stuff examples in PHP.

There are some books on AI on internet but they use Java , Python.

Now i have to apply AI techniques on web application.

WHich language should i choose java or python.

I searhed on internet that i can call java classes inside my php so that can help as as i am very good at php

i have also seen that python can also be used with php as well

So which way should i go and roughly how much it will take me to learn java

i have done java basics but that was 6 years ago