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Figure 8-11

Figure 8-12

Using the simple CAPTCHA library, it’s quite easy to implement a simple “human” check before you

accept a comment submission.

This little script is still not bulletproof. It can be improved by implementing a more complex mechanism

such as the use of obfuscated images. However, the script does its job nicely and it’s appropriate to be

used on small web sites.

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Chapter 8: Black Hat SEO

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