Question

I have a strange issue here – see below.

Page X

• Contain a form having method as post
• User submits the form – There some form validation.
• If everything validates I save the data, set a flash data message in the session (i.e. query success/failed) and redirect() the user to current_ur()
• Now, I can see the flash message and If I press F5 – I get do you want to submit the form again?

Shouldn’t this just refresh the page? How do I stop it making another submit request?
If I redirect to Page Y, and press F5 there, then it doesn’t ask me to resubmit? I am lost here!

Answer 1

OK guys

This is NOT a CodeIgniter issue. It is an issue with Firefox. I’m using 14.0.1 version of Firefox.

I have tried the same form and process in IE 7, 8, 9, Safari 5, Chrome (latest) – they don’t show me the confirmation dialog box to re-submit the form on F5.

---

Update

In firefox I get this message –

To display this page, Firefox must send information that will repeat
any action (such as a search or order confirmation) that was performed
earlier.

I just setup another script (without CI) and tested in Firefox. I tried to create the similar process (i.e. post and redirect to same page) … I don’t get this message at all. Refresh works just fine. So I take Its back on to CI now?

Update 2

OK I think I have cracked it now –

I’m using CI’s redirect function – see below – the second parameter takes default value as ‘auto’ and when it’s auto it sends header as header('Refresh:0;url='.$uri); which makes the Firefox throw the above message. As mentioned above, I don’t get the same behaviour in other browsers. I hope it helps someone.

function redirect($uri = '', $method = 'auto', $http_response_code = 302)
{
    if ( ! preg_match('#^https?://#i', $uri))
    {
        $uri = site_url($uri);
    }

    // IIS environment likely? Use 'refresh' for better compatibility
    if (DIRECTORY_SEPARATOR !== '/' && $method === 'auto')
    {
        $method = 'refresh';
    }

    switch($method)
    {
        case 'refresh':
            header('Refresh:0;url='.$uri);
            break;
        default:
            header('Location: '.$uri, TRUE, $http_response_code);
            break;
    }
    exit;
}