PHP - Expire page after it's loaded instantly

[Gamerz]

What is the best way to expire a page after it's loaded for one time..

 

Here is my problem:

I have a file uploader...someone uses my uploader, and uploads something. They refresh it, and the image gets uploaded again.

 

 

[mikesta707]

if you want a simple form of flood protection, you could create a session, like so

//after you do all the form stuff
$_SESSION['formXYZ_sent'] = true;

 

then simply check if they sent the form already

 

if (isset($_SESSION['formXYZ_sent']) && $_SESSION['formXYZ_sent']){
//form stuff
}
else {
echo "Information already recieved";
}

[Gamerz]

Wait, I dont get it...

 

So do you put $_SESSION['formXYZ_sent'] = true; on the upload processing page or literally right after the form.

 

And do you put the below code before the actual form? I'm a lil confused

if (isset($_SESSION['formXYZ_sent']) && $_SESSION['formXYZ_sent']){

//form stuff

}

else {

echo "Information already recieved";

}

 

 

[Kaboom]

after upload send them someplace new so cant refresh and add die; so cant use resubmit?