Prevent resubmit form after click “back” button

Question

I have 2 pages :

page1.php :
- has a form with text box and a \"submit\" button. Eg :

Answer 1

Rather than

echo '';

you should use the header() function to redirect your user after the submission.

So in psuedo code,

click submit on page.php action page1.php page1.php submits data to database calls

header('Location: http://example.com/page2.php');

This should prevent your clicking back problem