Page 19 - Monthly Archives: February 2026

Running Linux servers with shared logins and unmaintained accounts risks security gaps that only surface after an incident. This article explains useradd, usermod and groupadd from the ground up, shows the principle of a dedicated unprivileged user per application and provides a practical workflow to systematically audit existing users and groups on a server.

A test suite with 100 percent line coverage can still be worthless if tests merely execute code instead of verifying its behavior. Mutation testing deliberately introduces small bugs into your code and checks whether your tests actually notice. Applied correctly to PHP and PHPUnit, it exposes blind spots that classic coverage metrics systematically hide.

React Native does not render on the Apple Watch or a Wear OS watch, watch apps are always standalone native targets. This article covers the communication strategy through WatchConnectivity and the Wearable Data Layer API, plus the realistic limits of code reuse.

A flawed database schema costs a multiple of the fix that would have been possible at the design stage. Database schema design with AI review uses Claude to spot normalization mistakes, missing constraints and inefficient index strategies before the first migration runs in production.

Running Static Content Deployment on the production server means long maintenance windows, server-dependent build results, and unpredictable runtimes. The right place for SCD is the CI build job, paired with the Hyva Tailwind build, setup:di:compile, and pub/static as a controlled artifact that can be deployed to any server.

Every DOM access that reads a layout property can force a complete recalculation of the page geometry before the browser even gets to paint. Mixing reads and writes inside a loop creates layout thrashing and blocks the main thread for hundreds of milliseconds. This article explains the rendering pipeline, forced synchronous layout, and the batching patterns that keep interfaces running at a smooth 60 frames per second.

Classic PHP in the shared-nothing model has no true in-memory connection pool within a single process. Anyone who still wants to avoid the overhead of constant reconnects needs either persistent connections with clear boundaries, an external connection pooler like ProxySQL, or a long-running process model like Swoole.

Nearly every modern PHP framework promises a PSR-15 compatible middleware pipeline, yet what happens internally stays a black box for many developers. We build the pipeline step by step ourselves, without a framework, and use logging, auth and CORS middleware to show exactly how the onion model works technically.

PSR standards are the reason why any logger, any cache adapter and any HTTP client are interchangeable in practically every modern PHP project, without application code needing to change. Anyone who knows the most important PSR standards, from logging through caching to event dispatching, chooses libraries more deliberately and avoids unnecessary coupling to a single vendor.