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Development & programming

Blog / Development & programming

Total: 28

mbstring.func_overload and mbstring.internal_encoding in PHP: Configuration and Migration

A practical guide to mbstring.func_overload and mbstring.internal_encoding: checking PHP, finding legacy dependencies, and migrating safely to PHP 8.

Published: 11.09.2026

MySQL error #1227 and enabling the Event Scheduler: permissions, checks, and fixes

Fix MySQL error #1227 when enabling Event Scheduler: check privileges, ON/OFF/DISABLED states, DEFINER issues, VPS settings, and execution.

Published: 11.09.2026

Cache-Control: max-age — Complete Guide

Learn how Cache-Control max-age works across browsers, CDNs, Nginx, Apache, and WordPress, with practical TTL checks and troubleshooting.

Published: 11.09.2026

Fix ERR_INVALID_RESPONSE in phpMyAdmin and PHP

Diagnose ERR_INVALID_RESPONSE in phpMyAdmin and PHP with curl, PHP-FPM logs, timeout checks, memory/OOM tests, MySQL diagnostics, and proxy comparisons.

Published: 11.09.2026

How to Keep a Telegram Bot Running Reliably 24/7

How to keep a Telegram bot running reliably 24/7 with systemd, PM2, automatic restarts, monitoring, alerts, task queues, databases, and backups.

Published: 15.07.2026

How to Choose a Server for a Telegram Bot Without Paying for Unused Resources

How to choose a VPS for a Telegram bot without overpaying: workload, databases, NVMe, KVM, server location, growth reserve, and upgrade signals.

Published: 13.07.2026

Running a Telegram Bot on a VPS: Why It Beats Hosting It on a Home Computer

A Telegram bot can start on a home computer, but production use requires reliability, stable connectivity, security, automatic recovery, and predictable VPS resources.

Published: 11.07.2026

VPS for Developers: Test Environments, Staging, and Private Services

A VPS helps development teams build staging environments, run Docker, GitLab, Redis, CI/CD, VPN, and private services without the restrictions of shared hosting.

Published: 21.06.2026

Why a Telegram Bot Needs Reliable Hosting, Not a Home Computer

A practical guide to hosting Telegram bots reliably: uptime, webhooks, HTTPS, background processes, logs, security, and why a home PC is rarely a good production environment.

Published: 11.06.2026

PHP mb_detect_encoding() — Supporting Multiple Encodings

Sibling to the general mb_detect_encoding guide focused on passing multiple candidate encodings. Walk through the array-vs-comma-separated-string syntax, order-of-checking impact on detection accuracy, multi-language fallback patterns (UTF-8 → Windows-1251 → ISO-8859-1), and the strict-mode trap.

Published: 01.08.2025

Change memory_limit via ini_set() in a PHP Script (Runtime Override)

`ini_set("memory_limit", "256M")` at the top of a PHP script raises the limit for that request only. Walk through the syntax, verifying with `ini_get`, when this is appropriate (one-page heavy-processing endpoints), the alternative of CLI flags, and the gotcha when ini_set is called too late (after memory already allocated).

Published: 11.03.2025

Change memory_limit via ini_set() in a PHP Script (Sibling Reference)

Companion to the ini_set memory_limit guide — same content, different slug for historical SEO. Walk through ini_set syntax, verifying with ini_get, appropriate use cases, alternative via .user.ini, and the diagnostic when the change doesn't take effect.

Published: 21.09.2025

How to Add a Vary: Accept Header Using PHP

When dynamic responses vary by client capability (mobile vs desktop, JSON vs HTML), emit `Vary: Accept` from PHP via `header("Vary: Accept");`. Walk through when this is appropriate, the syntax including the append-pattern when you need both `Accept` and `Accept-Encoding`, verifying with curl, and the cache-fragmentation trade-offs.

Published: 07.05.2026

Modify php.ini to Set memory_limit = -1 (Unlimited Memory Usage)

Setting `memory_limit = -1` in php.ini removes the cap for all scripts that use that php.ini. Walk through finding the right php.ini per SAPI, modifying the setting, restart, verification, the alternative of per-script `ini_set`, and the warnings about why -1 in production php.ini is usually wrong.

Published: 10.05.2026

What is SimpleXLSX? A Lightweight PHP Excel Reader

SimpleXLSX is a single-file PHP class for reading .xlsx (Excel) files — no Composer, no PHPSpreadsheet dependency, fits use cases where you just need to extract rows. Walk through installation (drop the .php in lib/), the basic read API, common patterns (iterate rows, named-cell access), error handling, and when to prefer PhpSpreadsheet instead.

Published: 15.12.2025

PHP memory_limit = -1: What Does It Mean?

memory_limit = -1 in PHP means "no limit." Walk through what it actually does (removes the cap, lets PHP allocate until OS OOM kicks in), when it's appropriate (CLI deploy scripts), when it's dangerous (web SAPI under load), best practice (cap web; -1 for specific CLI tasks only), and monitoring memory usage in production.

Published: 13.03.2025

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