I don't know why he pushed you should learn "the popular one" so hard, unless he meant that ironically. There's no way to choose the most popular language from PHP, Ruby, and Python.
I do agree on books vs. blogs though. When I started learning Python as my first real language this summer the best source I ended up learning from was LPTHW[1] (I used the free online edition). I think a book like that is a good tool for learning a language, because it makes sure you hit on every important feature/concept in that language. However, I later bought a physical book for $30 about Django that didn't do anything except hold my hand and walk me through what could be a 20 minute Django tutorial on YouTube. Maybe it was just a bad book, but when it comes to learning a framework/stack, I think the documentation provided if you choose one of these so-called popular options will be plenty, and from there it's tinkering and screwing up that gets you there.
I do agree on books vs. blogs though. When I started learning Python as my first real language this summer the best source I ended up learning from was LPTHW[1] (I used the free online edition). I think a book like that is a good tool for learning a language, because it makes sure you hit on every important feature/concept in that language. However, I later bought a physical book for $30 about Django that didn't do anything except hold my hand and walk me through what could be a 20 minute Django tutorial on YouTube. Maybe it was just a bad book, but when it comes to learning a framework/stack, I think the documentation provided if you choose one of these so-called popular options will be plenty, and from there it's tinkering and screwing up that gets you there.
[1] http://learnpythonthehardway.org/