Learn how to effectively implement data abstraction in large web applications through this 41-minute conference talk from PHP UK Conference 2012. Explore the challenges of database-centric applications and discover best practices for creating flexible, scalable data layers. Gain insights into the LAMP stack, Socorro, data models, actions, and the importance of disassociating tables from models. Examine custom objects, standard class objects, HBase, and NoSQL databases. Understand the DataMapper pattern, strategies for predicting future needs, and infrastructure considerations. Enhance your ability to design robust web applications that can easily adapt to new data sources and changing requirements.