Modern PHP

http://www.phptherightway.com/
https://www.airpair.com/php/posts/best-practices-for-modern-php-development
http://blog.fortrabbit.com/10-pillars-php-dev
http://programmer.97things.oreilly.com/wiki/index.php/Deploy_Early_and_Often
http://blog.fortrabbit.com/multi-stage-deployment-for-website-development
http://12factor.net/
http://slashnode.com/the-12-factor-php-app-part-2/