Same page processing

Question

How can process a form on the same page vs using a separate process page. Right now for signups, comment submissions, etc I use a second page that verifies data and then su

Answer 1

you can check if it was POST request inside the page's code and then check the data. If it was GET request - just show the form.

But please remember that is is a good practice to show successfull form submission results on a different page served through GET request, i.e. any successfull form POST should be answered with redirect to the success page.