Tutorials for Developers & Sysadmins

Step-by-step guides for the work we actually do — Laravel, PHP, WordPress, MySQL, Linux servers, and the occasional rabbit hole. Every command has been run on a real machine; nothing is theoretical.

Get the index in a jQuery each loop
Web Development

How to Get the Index in a jQuery .each() Loop

Get the index in a jQuery .each() loop via the first callback parameter: function (index, element). Includes $.each() for arrays/objects…

how7o
how7o
Get a remote file size from URL in PHP with get_headers
Web Development

How to Get a Remote File’s Size from a URL in PHP

Get a remote file's size from a URL in PHP without downloading — get_headers($url, true) reads Content-Length, or cURL with…

how7o
how7o
Get the current year in PHP, Laravel and JavaScript
Web Development

How to Get the Current Year in PHP (and Laravel and JS)

Get the current year in PHP with date('Y'), in Laravel with now()->year or date('Y'), in JavaScript with new Date().getFullYear() —…

how7o
how7o
Get a favicon URL with JavaScript
Web Development

How to Get a Website’s Favicon URL with JavaScript

Get a website's favicon URL with JavaScript using Google's favicon service, DuckDuckGo's icons API, or the bare /favicon.ico fallback —…

how7o
how7o
Format a PHP number with leading zeros — sprintf and str_pad
Web Development

How to Format a Number with Leading Zeros in PHP

Format a number with leading zeros in PHP using sprintf('%04d', $n) or str_pad($n, 4, '0', STR_PAD_LEFT). Both pad short numbers…

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how7o
Reduce high memory usage on Windows 11
OS

How to Reduce High Memory Usage on Windows 11

Reduce high memory usage on Windows 11: triage in Task Manager, disable startup apps, disable SysMain on SSDs, adjust visual…

how7o
how7o
Fix broken cPanel disk quotas with the fixquotas script
Server Management

How to Fix Quotas in cPanel

Fix broken cPanel quotas with /usr/local/cpanel/scripts/fixquotas. Includes the mount-option check, package quota verification, and CloudLinux INODES cap.

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how7o
Diagnose MySQL 100% CPU usage with PROCESSLIST and INNODB STATUS
Server Management

How to Find What’s Pinning MySQL at 100% CPU

Find what's pinning MySQL at 100% CPU: SHOW FULL PROCESSLIST, SHOW ENGINE INNODB STATUS\G, and information_schema.processlist queries to roll up…

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how7o
Fix XAMPP MySQL shutdown unexpectedly error
Server Management

How to Fix “Error: MySQL Shutdown Unexpectedly” in XAMPP

Fix the "MySQL shutdown unexpectedly" error in XAMPP: rename mysql/data to data_old, copy mysql/backup as the new data, restore your…

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how7o
Fix CORS policy blocked origin errors in PHP and Apache
Web Development

How to Fix “CORS Policy Blocked Origin” Errors

Fix "Origin blocked by CORS policy" errors: send Access-Control-Allow-Origin from PHP or .htaccess, handle preflight OPTIONS, and drop the wildcard…

how7o
how7o