(Derick Rethans)[https://derickrethans.nl] is a PHP internals expert and author of (Xdebug)[https://xdebug.org]. He works as an independent contractor and consultant on PHP extensions and related projects.
He has contributed to the PHP project in numerous forms (Date/Time Extension, Xdebug, PHP 4.4/7.4 Release Manager, etc). He is a frequent lecturer at conferences, the author of php|architect’s Guide to Date and Time Programming, and the co-author of PHP 5 Power Programming. Derick is also the host of the weekly-ish (PHP Internals News)[https://phpinternals.news] podcast.