All the recent double posts make me wonder if some browser stopped warning on resending post data on a refresh.

Opera does not seem to resend at all which of course is desirable.

Let's see: 

durr 

I am a good browser, I prompt. 

derp 

I behave like Opera, not resending, not prompting. 

The conclusion is that people are using Internet Explorer 4.0

Weird. Make gamma rays or moon phases? 

As I stated before, Chrome. 

! 

! 

that was chrome, but it prompted first. don't know why i clicked yes 

metl, could you make an anchor in view_thread.php right after the top-most pagination before the first rendered post? And then point to that in "New X" links.

Would save at least 42 milliseconds of scrolling whenever one visits posts with long main posts. ;) 

Test 

Test in Chrome 

So Firefox (and every other browser once upon a time) lets you refresh without posting, Chrome offers to resubmit the form. I'm not sure why it offers that, since i use a redirect to help clear out the form data (so that people can refresh the page without worries.) Chrome is just too clever; I guess i'll need to find another way. 

It's amazing and sad how many people seem to click yes without thinking though. I hope they don't do that for java applets. 

Is to store a magic value in the session and in a hidden form field. On submit, the session value is removed. If the session value is missing, nothing gets posted. 

That is. 

Or manually kill the $POST vars after submission maybe.... ? 

It's amazing and sad how many people seem to click yes without thinking though. I hope they don't do that for java applets.
To be fair, that's what happens when too many things ask too many stupid questions. You condition people to click YES out of reflex. 

You may already have tried this, or already have this. But, try putting "exit;" after your header("Location: ") redirect. 

Can't post anywhere 

 

not sure why it can happen, but this means you loaded the page with one IP address, but when you submitted your post you had a different IP.

Maybe it happens on mobile phones more because they can change networks frequently? (edge <-> 3g <-> wifi) 

I understand. I'm at home where I'm in my wifi, but sometimes it switches to mobile broadband for some reason. Thanks! 

i can see how that might help, as my php still generates the entire page after you post.

I wonder if chrome is ignoring the redirect because it's the same URL? In that case i could use a second URL as the post target and then redirect back to view_thread.php.