If the request does something that is not read-only (like the OP's script seems to do), I'd very strongly consider changing the form submission to POST from GET.

That is against the common accepted wisdom of Post/Redirect/Get

In reply to Re^3: Web form to alter files is writing to file before submit button is pressed. by Anonymous Monk
in thread Web form to alter files is writing to file before submit button is pressed. by Lady_Aleena

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