PHP UK Conference 2012 - PHP under the hood, by Johannes Schlüter

This talk focuses on the inner workings of PHP, breaking down complex concepts in the PHP runtime to enhance understanding without delving into C code. Key topics include HashTables, which serve as the foundation for PHP arrays and other internal data structures, as well as the reference counting mechanism crucial for efficient code writing and the overall executor. Johannes Schlüter, an active contributor to the PHP project and Release Manager for PHP 5.3, draws on his extensive experience with the PHP community and his role at Oracle's MySQL Engineering team to provide valuable insights.