You can use hidden fields, but that only hides things; it makes it only a little bit more difficult for a mischief maker to do bad things. A better solution is to encode the database query logic in a module or run state somewhere in the code, where users can't access it and you're not sending it to the client and trusting it to come back safely. CGI::Application is one good approach.
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Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
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<pre> tags. In fact, <pre>
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intervention).
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Want more info? How to link
or How to display code and escape characters
are good places to start.
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