Easiest way to prevent reposts?

[twilightnights]

Is there a very easy way to prevent someone from submitting the same information more than 1 time to a database?

[btherl]

You can check if the information is already in the database before adding it.

If that doesn't answer your question, please provide some more detail so we can help you better :)

[chronister]

I agree with btherl,

Gather up your data that has been submitted, and run a query to see if the data exists, if not then another query to add it, else print an error message to user stating that the data already exists.

[ted_chou12]

if what you mean is clicking refresh, then you can redirect them using header("location: ..."); to guide them to another page so even if they do click refresh, the form wont submit again.
Ted