Browse all our Laravel 12, CodeIgniter 4, and PHP tutorials. Each guide includes working source code, best practices, and step-by-step instructions.
Adding Google Sign-In to your CodeIgniter 4 application improves user experience, boosts conversion rates, and enhances security by leveraging Google's authentication. This step-by-step guide shows you how to integrate Google OAuth login using the official Google API Client library — no third-party packages needed beyond Composer.
CodeIgniter 4 Shield is the official, powerful authentication and authorization library for CodeIgniter 4. It handles login, registration, password reset, email activation, roles/permissions, and more—securely and with minimal setup.
In modern web apps, storing user-uploaded files locally limits scalability and security. CodeIgniter 4 AWS S3 integration solves this by using Amazon's reliable cloud storage. This step-by-step tutorial shows how to upload, list, download, and delete files from an S3 bucket using the official AWS SDK for PHP.
QR codes remain essential in 2026 for contactless menus, event tickets, payments, vCards, and marketing. In this guide, you'll learn how to generate QR codes in CodeIgniter 4 dynamically, support multiple formats (URL, text, phone, SMS, email, Skype, vCard), store them as PNG images on your server, and display them instantly. We use the reliable PHP QR Code library with a custom wrapper for easy integration. Why this approach? It's lightweight, requires no external API, gives full control over styling/storage, and works offline.
Creating a custom library in CodeIgniter 4 is a powerful way to extend the framework’s functionality to suit your application's specific needs. Here’s a step-by-step guide on how to create a custom library in CodeIgniter 4.
In this article, we explore the CodeIgniter 4 HMVC application in detail. We’ll walk through how to set up HMVC integration in CodeIgniter 4, and look at examples of applications built using the CodeIgniter 4 HMVC Architecture Pattern.
