Preventing Multiple Poll Entries
- Restricting multiple votes in an election poll.
- Open the poll results page in a text editor.
- Insert the retainedIPEntries parameter in the mgiPoll tag.
- Save the poll results page.
- FTP the poll results page to the web server running MGI.
- Submit the poll.
Step 1: Open the poll results page in a text editor.
- Open the poll results page in a text editing program that allows you
to view and modify HTML.
Step 2: Insert the retainedIPEntries parameter in the mgiPoll tag.
- Visitors can be restricting from voting in a poll multiple times based
upon their IP number. In the retainedIPEntries parameter, enter an integer
(whole number) to designate how many IP numbers should be held in memory
as a comparison for the IP number of the current visitor. As the integer
increases, the time until a visitor is allowed to vote in the poll again
increases. Consider the number of visitors per time interval to determine
what integer to use. For example, if you expect 50 visitors per hour and
you want to restrict visitors to voting once per hour, then the enter "50"
in the retainedIPEntries parameter. In the same example, if you want to
restrict visitors to voting once per day, then enter "1200" in
the retainedIPEntries parameter.
- When a visitor submits the poll, their IP number is recorded in a database
with the number of records entered in the retainedIPEntries parameter.
Each visitor's IP number is added to the database until all records are
full. The IP number of the next visitor to submit a poll replaces the oldest
IP number in the database. Each time a visitor submits the poll, their
IP number is compared to the IP numbers in the database. If the visitor's
IP number matches an IP number in the database, then their poll answers
are not added to the poll results and an error message is not displayed
to the visitor (i.e., the visitor does not know that their multiple submissions
have been ignored.). If the visitor's IP number does not match an IP number
in the database, then their answers are added to the poll results.
tally="yes" tallyresultsby="total" colorcycle="blue,red"
Step 3: Save the poll results page.
- Save the changes you have made to the poll results page.
Step 5: FTP the poll results page to the web server running MGI.
- Upload the poll results page to the web server using an FTP program.
Step 6: Submit the poll.
- Access the poll with a web browser. Complete and submit the poll. The
first time you submit the poll your answers are added to the poll results
and the poll results display. If you immediately try to submit the poll
again your answers are not added to the poll results, but the current results
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