The Zend Developer Zone has posted yet another in their running series of security tips to help you safeguard your applications - Tip #20 concerning security resources to check into.
To paraphrase an American Patriot "The price of security is eternal vigilance". You have to keep watch over your system but you also have to keep learning. Today's security tip is a list of resources to help you keep your security knowledge up to date. I've gathered together several resources for you to consider when looking for PHP Security information.
Resources Cal recommends include Chris Shiflett's book "Essential PHP Security", the APress "Pro PHP Security" from Chris Snyder, and more. Of course, he also recommends their own Security Tips series for helpful hints as well.