Php-PHP is used as the frontend in the background java. how does the backend receive data from the frontend?

I learned PHP. what should I do if a company's website's java frontend allows me to do the website's back-end? Is the framework used? For PHP websites, most of the front-end data is received through form submission at the backend. is the front-end data received through form submission at java? $ _ POST? If any of your predecessors have ever encountered this kind of situation, I would like to pass on experience. thank you very much !! Phpjava

I learned PHP. what should I do if a company's website's java frontend allows me to do the website's back-end? Is the framework used? For PHP websites, most of the front-end data is received through form submission at the backend. is the front-end data received through form submission at java? $ _ POST? If any of your predecessors have ever encountered this kind of situation, I would like to pass on experience. thank you very much !!