Achilles Kaloeridis, backend developer. Notes on PHP, Symfony, Git, Linux and the boring, reliable parts of the web.https://achilleskal.comenhttps://achilleskal.com/blog/self-hosted-backups-restichttps://achilleskal.com/blog/self-hosted-backups-resticSelf-hosted backups with restic for under €1 a month. Databases, files, scheduling, monitoring and how to test a restore you can trust.Thu, 01 Oct 2026 00:00:00 GMTdockerlinuxhttps://achilleskal.com/blog/git-noteshttps://achilleskal.com/blog/git-notesMy personal Git cheat sheet. Commits, diffs, history, branches, stashes, rebases and undoing mistakes, one short command per line.Sat, 27 Apr 2024 00:00:00 GMTgithttps://achilleskal.com/blog/symfony-entity-timestamp-metadatahttps://achilleskal.com/blog/symfony-entity-timestamp-metadataAdd createdAt and updatedAt to Doctrine entities without an extra bundle, using a trait, a lifecycle listener and the Symfony Clock.Sun, 17 Mar 2024 00:00:00 GMTphpsymfonyhttps://achilleskal.com/blog/the-strategy-patternhttps://achilleskal.com/blog/the-strategy-patternThe strategy pattern in plain PHP. Swap algorithms at runtime behind one interface, shown with a shopping cart and two payment methods.Sun, 28 Jan 2024 00:00:00 GMTphppatternshttps://achilleskal.com/blog/linux-101-noteshttps://achilleskal.com/blog/linux-101-notesNotes on the Linux basics I use every day as a developer. Boot, systemd, files, processes, permissions, networking and shell shortcuts.Thu, 04 Jan 2024 00:00:00 GMTlinuxhttps://achilleskal.com/blog/git-refloghttps://achilleskal.com/blog/git-reflogGit keeps a log of every move HEAD makes. Here is how to use git reflog to undo an amend, a bad hard reset or a lost commit.Sun, 03 Apr 2022 00:00:00 GMTgithttps://achilleskal.com/blog/php-docker-xdebughttps://achilleskal.com/blog/php-docker-xdebugStep debugging PHP in Docker. A minimal Docker Compose setup with Xdebug 3, the PhpStorm settings it needs, and fixes for when it won't connect.Thu, 03 Jun 2021 00:00:00 GMTphpdockerhttps://achilleskal.com/blog/modern-javascripthttps://achilleskal.com/blog/modern-javascriptA cheat sheet of the modern JavaScript I reach for. Destructuring, arrow functions, array methods, modules, promises and async/await.Mon, 28 Dec 2020 00:00:00 GMTjavascripthttps://achilleskal.com/blog/dependency-injection-phphttps://achilleskal.com/blog/dependency-injection-phpDependency injection is a simple yet powerful technique that can help you avoid hardcoded dependencies in your classes.Mon, 27 Apr 2020 00:00:00 GMTphphttps://achilleskal.com/blog/introductionhttps://achilleskal.com/blog/introductionWhy I started this blog. Notes from a backend developer on PHP, Symfony, Git and Linux, written down so I understand them better.Thu, 10 Jan 2019 00:00:00 GMTmeta