This presentation: http://talks.php.net/show/web-app-security]]>

PHP Manual - Chapter 5 ("Security"): http://www.php.net/security]]>

Open Web Application Security Project: http://www.owasp.org]]>

PHP and the OWASP Top Ten: http://www.sklar.com/page/article/owasp-top-ten]]>

Secure Programming HOWTO: http://tldp.org/HOWTO/Secure-Programs-HOWTO/]]>