Learn how to use UUIDs in MySQL for your table IDs, rather than using auto_increment.
Install the PT Mono font with a BASH script.
A lightning talk on UUIDs from the maintainer of the ramsey/UUID package library for PHP.
A talk made by Macro Pivetta on "Doctrice ORM Good Practices and Tricks".
Learn about the finally clause.
Use the tree tool for displaying your file structure.
Learn how to include your package within itself for testing and not have to keep pushing the code and composer updating.
Request certificates from LetsEncrypt after having proven that you own the domain.
Prove you own a domain to LetsEncrypt, using the ACME PHP tool.
Register with LetsEncrypt using the ACME PHP.
Install the ACME PHP tool.
See just how easy it is to create keys for your services that have limited access rights. This could save your bacon.