Node.js or PHP ?

both for different projects.....

Or both at the same time 😈

Nodejs (personally)

But it depends what kind of thing/ problem you want to solve

For me it's like Node for non relative databases and mobile apps' backends, PHP for relative. There are many differences.

Depends on your needs. If it needs to run on a shared environment: PHP. If it needs to be asynchronous: Node. They both have pro's and con's.

Both enforce bad practices. In any case use a framework if the project is serious. :)

Node Js anytime

php for the beginner
nodejs for the experienced

Depends on for what. There is no holy grail of languages. Rather you should ask different questions, like:

How many concurrent users am I expecting to have? What kind of liberties do I have with my hosting solution? How much time are we able to spend working with a new technology?

For what it's worth, Node done right is really good at concurrent requests for most projects, but your hosting solution should be a bit more flexible because when it goes big, you'll need to scale horizontally rather than vertically. Heroku, AWS, Digital Ocean, those types of places.

I have just started a Node.js class. Looks interesting so far

Node by far does anything PHP can, just better.

Questions like that trigger me :| can't just say X is better. Even knowing how horrible the language is, it has a huge following and lots of frameworks to make life easier.