Fighting WordPress Comment Spam with a Nonce
In addition to blocking the comment spam bots that don’t include a HTTP_REFERER header indicating the request came from your web site, as indicated in a previous posting Fight Back Against WordPress Comment Spam with a HTTP_REFERER Check, additional steps can be taken to combat comment spam. This post will discuss the addition of a nonce field to your comment form that verifies the request came from your web site and not from somewhere else.
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