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The case for contravariant template types

PHPStan has only supported invariant and covariant template types because they are so prevalent in real-world applications. But contravariant template types also have their use cases, and the latest release of PHPStan adds support for them, among other small improvements to generics.

2 years ago6 min read

The true power of sealed classes

In my recent post, I've introduced a PHPStan extension that brings support for sealed classes and interfaces to statically analyzed PHP. Looking back, I feel I haven't stressed the main benefit enough, so here I am doing it justice.

2 years ago4 min read

Seal your classes with PHPStan

Sealed classes are a useful feature of Kotlin: they allow you to specify which classes are allowed to extend a sealed class (or implement a sealed interface). With the recently released PHPStan 1.9.0, you can now introduce sealed classes to your PHP codebase too!

2 years ago4 min read

Your application needs a clock

Previously, I've discussed working with date and time values both server- and client-side, and I've covered storing temporal data in databases. This time, we're going to talk about telling time.

3 years ago5 min read

Storing dates and times in databases: the painless way

I've already talked about working with date and time values on both sides of the web stack. However, in web development, we not only manipulate temporal values, we often need to store them somewhere and retrieve them later. This post discusses the best methods of persisting dates and times in databases.

3 years ago9 min read

Beyond Date: bulletproof date and time API in JavaScript

I've talked about date and time not being easy in PHP, and it's not easier in JavaScript either. Luckily, similarly to the PHP ecosystem, the community has provided better solutions to date and time than the native Date. Let's discuss them.

3 years ago5 min read

Beyond DateTime: a domain-driven approach to date and time

Time is omnipresent in software development. Pretty much every web application works with it in one way or another. Even the simplest blogging platform stores "when" a post should be published and then displays and sorts them using that information. While you might not run into any issues when developing a blogging platform, any more complex system can easily expose how complicated time actually is. Because time is complicated. And yet, many standard libraries in programming languages only give us a limited arsenal to tackle it.

3 years ago13 min read

Hello, I am Jiří Pudil

I am a full-stack web developer from Brno, Czech Republic. I contribute to open-source projects, write a technical blog, and speak at meetups and conferences.

Learn more about me