well, I won't get around PHP as I have to use it for university. It seems you're having the same opinion as the person that brought me to ask this question. He said PHP was a dinosaur that we should get rid off.

According to most replies on here it rather seems that it's very useful and recommended to still know that language as it's still widely used.

I will, however, take a look into JavaScript (already started with codecademy) and later on at the other suggested languages.

Rhino is so far the only one I haven't previously heard about.

Thanks for your replies.