preventing double submit when hitting refresh ?

Question

preventing double sumbit in PHP.

Answer 1

A classic problem.
The best answer is to redirect the user to another page on submit....

OR

After you are done with the post var you could reset it to null and before processing the post value check that it is not null.

Just a thought - something like,

foreach ($_POST as $val)
{
unset($_POST[$val]);
}