Casim.ir URL shortener returns
Let's start with a bit of history.
Casim.ir is a URL shortener developed by Nicolas Hoizey in PHP eleven years ago (stylized by then as Cas.im/ir) with the intention of creating a light and simple URL shortener.
About seven years ago, I installed it to create my own private URL shortener at chu.so and some other open and public ones with some modifications on Nicolas's project.
Shortly after, I started contributing to the project with improvements and bugfixes and almost instantly Nicolas gave me direct write permission.