Here are some links about PHP:
- ActiveTuts – The Best Way to Learn PHP
- 25 Resources to Get You Started with PHP from Scratch article
- Helpful web apps article
- 11 tools to instntly code faster article
- Top 15+ Best Practices for Writing Super Readable Code article
Here are some books about PHP:
- PHP for the web, Visual quickstart guide, by Larry Ullman, Peachpit Press, 2011
- PHP 5 Advanced, Visual quickstart guide, by Larry Ullman, Peachpit Press, 2007