“Never argue with stupid people, they will drag you down to their level and then beat you with experience.”
― Mark Twain

Having answered more than thousand questions about PDO, I managed to compile all my experience into the article called The only proper guide on PDO, where learners can find best of the best practices; intermediate users will discover how simple and effective PDO code could be; and even advanced developers can learn new wonderful tricks, usually unknown to general audience.

Thinking on the SQL injection prevention for a long time, I wrote The Hitchhiker's Guide to SQL Injection protection and even managed to produce a proof for the ideas from it, called Safemysql - a mysqli wrapper that makes running mysql queries in PHP safe and incredible simple.