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.
How to Fix Missing Authorization Header in PHP Requests
Fix a missing Authorization header in PHP requests: forward it via .htaccess RewriteRule [E=...] or Apache SetEnvIf. Includes cPanel Pre-VirtualHost…
How to Extract a .tar.gz Archive in PHP
Extract a .tar.gz archive in PHP without shell access using PharData — two-step decompress() + extractTo(), or one-call on newer…
How to Enable the PHP DOM Extension
Enable the PHP DOM extension: install php-xml (or php8.x-xml), uncomment extension=dom in php.ini or run phpenmod dom, then restart PHP-FPM…
How to Duplicate a DIV into Another DIV with jQuery
Duplicate a div into another with jQuery using .clone() for the full element or .html() for inner markup. Includes event-handler…
How to Disable or Enable an Input with JavaScript or jQuery
Disable or enable an input with JavaScript: element.disabled = true/false. In jQuery 1.6+, use .prop('disabled', true) — not .attr(). Includes…
How to Delete All Lines in a File with Vi or Vim
Delete all lines in a file with Vi or Vim using :%d (shortest), :1,$d (explicit range), or ggdG (normal mode).…
How to Create Ajax-Based Pagination in DataTables
Enable Ajax-based pagination in DataTables with serverSide: true. Includes the request/response shape and a working Laravel controller for paginate, sort,…
How to Create a Login and Registration System in Laravel
Create a login and registration system in Laravel using laravel/ui (Bootstrap), laravel/breeze (Tailwind, minimal), or laravel/jetstream (teams, 2FA, API).
How to Create a Folder If It Does Not Exist in PHP
Create a folder if it doesn't exist in PHP: check with is_dir(), create with mkdir($path, 0755, true). Includes a race-safe…
How to Convert an Image to a Base64 String in JavaScript
Convert an image to a base64 string in JavaScript: fetch + FileReader.readAsDataURL for URLs, FileReader for file inputs, canvas.toDataURL for…