Well, this is the kind of generic questions, which put you in bad mood! Still, I would like to give you an answer.
It depends!
It depends on lot of factors. Size of the team, Complexity, cost involved and lot more which vary based on the company!
For example, for a freelancer, who is familiar with PHP, he would prefer to go with PHP with any JS MVC Framework with Bootstrap/Foundation to cover mobile aspect!
See, as I said, it depends! Try to give out more information next time you ask a question!