I'm sure this must have been suggested before, but I wasn't watching then...
When a comment form is generated, included a "magic number" as a hidden field. The only condition being that the number is unique. Then track those numbers which are submitted.
Depending on performance implications, either note the generation of the number, and strike it when the comment is submitted (and generate an error if the number is not found due to previously being struck), or simply record all those numbers submitted (and generate an error if the number has been previously seen). In either mechanism, flush entries from the cache after a certain time to keep it down to size.
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||