Sometimes, a picture is worth a thousand words - check out the one included with this new post on Ed Finkler's blog today, a graph of the NIST NVD data showing where most of the security-related PHP issues lie.
PHP Applications by themselves account for over 40% of all NIST NVD entries in 2006. We need more than new frameworks. We need new paradigms for PHP development.
These new paradigms of PHP development have been a long time coming (it's all been jokes about it thus far), but there's already forces at work to help make things simpler and better for those developing applications. Frameworks, while not new in themselves, are making writing applications easier than ever before when using their built-in tools.