I contribute to open-source projects on GitHub as @DanielEScherzer.
I have given a few presentation at various open-source-related conferences. The slides and my post-conference write-ups in my blog are listed below. Note that even when a presentation is given multiple times, the content changes.
I started contributing to the PHP source in August 2024, working primarily on bug fixes, improvements to the Reflection extension and various cleanup. In March 2025, I requested and was granted access to make direct changes (and approve others' changes) to PHP. I also became the official maintainer of the reflection extension.
Also in March 2025, I volunteered to serve as one of the release managers for the then-subsequent version of PHP, PHP 8.5. In April, the community voted to decide between the volunteers (luckily there were plenty of candidates) and I was one of the two "rookie" candidates chosen to help with the release. You can read more in my blog post. I subsequently volunteered to serve as the "veteran" release manager for the PHP 8.6 release cycle (blog post).
PHP uses a process of requests for comment when proposing and implementing major changes; my RFCs include:
I also wrote multiple open-source PHP packages - though some are currently primarily used by me, I am a firm supporter of open-source code and figured that they might be useful to others. The packages that I have created so far are:
The source code for my website is also public, in case the code is useful to others. The actual text about me is probably not going to be relevant, but my setup, configuration, and style pages may be useful. See the code here.