If you have to pay for every KB or MB that you go over on your hosting plan, Bad Behavior may be the solution for you. By effectively blocking known link spammers and bots this script will effectively lower your bandwidth usage and take the pain out of your hosting bill at the end of the month. It is open source and works with Wordpress, Joomla, and any PHP based site.

Bad Behavior promises to never block search engine spiders like Google, Yahoo, and MSN while protecting your site and your wallet.

They have a blog on the site that discusses spam, link spammers, and the likes.

Bad Behavior

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One of the best PHP Captchas that I have found, from their own site:

“This script generates images (known as “Captcha’s”) which contain security codes used for protecting a form from spam bots. By encoding a ‘password’ inside an image and asking the user to re-enter what they see you can verify the user is a human and not automated software submitting your form.”

PHP Captcha Page

It is easy to use, clearly coded, well commented and the how-to is amazing. In fact it is so awesome that I have used it in many scripts of my own, and I have even extended it to take colors through the query string. I set up a script here that uses Javascript to let you see what the captcha will look like when you pass it hex colors. I also have my modified code available in a zip file on the page.

My PHP Captcha, loaded to your colors as you type them

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This is the place for all things php.  The site itself is the face of the PHP development community, and all the people who make PHP possible.

From this site you can see what is currently happening with the PHP team.  You can read the docs and find out new and exciting things that PHP can do for your site.  You can also ask questions, tell them about problems with PHP, and see other people’s example code.

php.net

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