Is it worth it to implement registration and login to the account on ajax + php, if so, how? Or will it be better only on php?

Question

User identification

Developed a new site and user registration was based on php + ajax. But something did not work with ajax to start the session, and so on. And I thought maybe just php is better. But on what all the same to implement on php or on php + ajax?

Answer 1

AJAX is a technology that allows you to send data from forms WITHOUT reloading the page, but Comrade Dmitry is right about other languages.