Anti-Spam Techniques In PHP, Part 2
This article is part of the series “Anti-Spam Techniques In PHP”.
Anti-Spam Techniques In PHP.
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Introduction
This short series of articles provides a few simple techniques for protecting yourself and your web site from spammers.
It does this from two perspectives:
- Protecting people (including yourself) who post to your web site from being spammed (part 1)
- Protecting your web site from being spammed (this article)
This is the second article in the series, and covers the issue of protecting your web site from spammers.
In this article we cover a number of ways of overcoming spammers, including:
- CAPTCHA
- Manual approval (moderation)
- Text filters (blocking URLs)