Using php to rewrite the URL for refreshing issues

I know. I KNOW. OK? The way I have coded and put together my user management system is terrible. Im using actions. Now normally you would have another page handle the actio开发者_如何学JAVAns then redirect to the main page with the data but I havent done that. So currently, this is what occurs,

http://www.domain.com/index.php?action=newUser&id=1028

is refreshed and returns the error "That user already exists". Which is not that big of a deal. However.

http://www.domain.com/createblogpost.php?action=postNew

When the above is refreshed it results in a reproduced, identical post.

Is there a function or way I can get the php, at the end of the action=postNew code snippet that would have the URL rewrote to www.domain.com/createblogpost.php which would stop refresh injection.

Any ideas? Or any new paradigms of thought I havent considered? (inb4 dont code like a joke)

Thanks in advance, Aleski.

Send the Location header...

header('Location: http://example.com/somewhere-else');

This pattern is known as Post/Redirect/Get.

header('Location: www.domain.com/createblogpost.php');