Web Developing [Necessary] Languages

Hey guys,

I was just thinking what languages do I have to learn to become at least a beginner developer ?

I know it's not the right question, I asked a friend of mine and he said that he only uses HTML/CSS and a little PHP for creating sites...

I wanna learn these languages, which one do I start from ? Which ones are necessary/required ?

Only HTML/CSS/PHP ? What about Phyton etc etc...

I'm not even competent in this subject, would you mind to give me some info ?

Cheers, lakim0.