I wish there was something like this for all languages. I know Java, but there are often occasions when something isn't working that I didn't write and don't ha

I wish there was something like this for all languages. I know Java, but there are often occasions when something isn't working that I didn't write and don't have a clue about how to fix, but just need the basics to get started, and I can probably work it out by myself (e.g. our Wordpress site when the other two guys with experience in PHP leave). Programing syntax isn't usually the difficult part once you know two or three languages.