Hello Matt,
Monday, December 1, 2003, 10:31:23 PM, you wrote:
MG> Suppose I have a form. Upon submission, the metadata is posted to a
MG> processing script (a separate PHP file), which parses it and then sends the
MG> user back to a particular page using the header function. If said user
MG> clicks their browser's back button, the aforementioned processing script
MG> will re-parse that post data and create a duplicate record. How can I
MG> prevent this? Cache control?
There is no 100% reliable method of controlling the cache of any
browser. Why not, in your processing script, set a flag or issue
something to the users session to the effect of "already submitted
this form". Then if they do click back and submit it all again you can
check for the existence of this value and give them a nice friendly
error message ("Thanks for your enthusiasm, but you've already done
this!") :)
--
Best regards,
Richard mailto:[EMAIL PROTECTED]
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