Question

So as the title says i want to prevent user from keep submiting $_POST data to my database.

Now what i have is form and simple class for submiting form data to my database. The problem is that if user submits data and refreshes browser it would submit same data again.

I know i could refresh page by my self with meta or by using headers, but i don’t wanna do something so stupid, so i guess i could just do something like $_POST = null; not sure if that works but i actualy wanna keep all post data because if some errors appears i want to populate my form with previous post data…

Anyways i hope you guys get what i wanna do here and can help me a little 😀

Answer 1

The simple solution is you should redirect users after form submission and procession on that data.

You could make a check if the data is successfully submitted and processed redirect users otherwise don’t redirect them this can keep $_POST data to re-populate fields.

This will prevent re-submission of form.

General Pseudocode

if (isset($_POST['submit']))
{
    if(validate() == true)
    {
        //passed the validation
       // do further procession and insert into db
       //redirect users to another page 
      header('location:someurl'); die();
    }
    else
    {
       $error='Validation failed';
       // do not redirect keep on the same page 
       // so that you have $_POST to re populate fields
    }   

}