This document discusses PHP 7.0's error messages. It begins with an agenda to review 2200 error messages and discuss new features, traps, and messages. The speaker is identified as the CTO of exakat, a PHP static auditing engine. The top discusses evolving error messages by searching code repositories and outlines the top 5 error messages found in the source code and via Google searches. It then outlines new error messages, better linting, removed messages, and cryptic messages.