title: How to prevent form resubmission when page is refreshed (F5 / CTRL+R)
body: <p>I have a simple form that submits text to my SQL table. The problem is that after the user submits the text, they can refresh the page and the data gets submitted again without filling the form again. I could redirect the user to another page after the text is submitted, but I want users to stay on the same page.</p>
  
  <p>I remember reading something about giving each user a unique session id and comparing it with another value which solved the problem I am having but I forgot where it is.</p>