On the Fortrabbit.com blog today they have a post where they share what they see as the 10 Pillars of PHP Development. It's a set of ten things they see as the most important to consider in a developer's work.

For most of us PHP developers writing applications now compared to ten or so years ago is quite a different endeavor. [...] This has changed in recent years. Classical web sites are becoming more and more the domain of specialized SaaS. [...] So web developers changed themselves by specializing and concentrating on what cannot be automated so easily: web applications. Along with this came a new mindset on how PHP development should be done and what tools should be used.

Their list of ten includes both generic topics (with a few subtopics for explanation) and specific technical items like:

• Code management
• Tests
• Dependencies and modularization
• Runtime data
• Deployment

Check out the rest of the post for other "pillars" in their list and explanations for each.