[drupal-devel] simple and effective comment spam prevention exists and works

Karoly Negyesi karoly at negyesi.net
Sat Oct 1 07:30:30 UTC 2005

> i believe the domain name can be replaced with a var to make it generic.
> i'm just not sure if there are cases where a valid client does not send
> a referrer.

Plenty. HTTP_REFERER is not something to rely on.

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