Anti-Spam Techniques In PHP, Part 2

Conclusion

In this article, we covered a few ways of protecting your web site from spammers. The methods were covered fairly briefly, but hopefully give you a few ideas for stopping (or at least minimizing) spam on your web site.

CAPTCHA is a very effective method that is widely used, and you should strongly consider it as a solution to the spamming problem — just make sure you’re aware of its drawbacks.

Resources

• The CAPTCHA project
• Wikipedia entry for Captcha
• Pear’s Text_CAPTCHA
• WordPress list of common spam words

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