The Zend Developer Zone has starting up their own contribution to the security side of the PHP community - a "Security Tip of the Week" starting with the first three new ones posted just recently:

• Tip number one involves a good recommendation - keeping your PHP version up to date. Many security issues and exploits have come around because of older versions and the issues they hold.
• Tip number two focuses on the errors that your site gives to the viewing public and the information they can betray (file locations, etc)
• Tip number three talks about using other applications to help you find issues in your code that you might not even know were there - such as Chorizo and the PHPSecInfo reporting tool.

Stay tuned for even more security goodness from Cal and the Zend Developer Zone over the coming weeks...