Claude Code vs Codex CLI: how we use both AI coding agents together
Hands-on comparison of Claude Code and Codex CLI from daily work, and why letting one review the other catches more mistakes.
Tech, explained simply
How big apps really work, what changed in AI, and how to keep your code secure. Short reads with clear diagrams.
You tap like. How does your friend's phone know a second later?
From your tap to your friend's buzz: events, a queue, a worker, live connections, Apple and Google push, and grouping 1,000 likes into one alert.
How do apps handle a million likes at once without crashing?
When millions tap like at once, one database row becomes a traffic jam. How big apps survive: a queue, split counters and a cache.
PHP security: 7 common vulnerabilities and how to fix them
Defensive PHP checklist: SQL injection, XSS, CSRF, password storage, uploads, sessions and unserialize, with the exact fix for each.