here’s a few more resources:
- SP – Coding Standards
Good article on Coding Standards – basically, how to write code that is easy to add to, maintain, and debug. Always good! - PHP Code Beautifier
Reformats PHP code based on your preferences, to make things easier to read etc. - Security Guide for PHP
Excellent guide to security. Includes code snippets, examples, and cases. Easy to read, and some excellent tips. Useful as a reference guide.