codeigniter-4 Tutorials, Examples & Guides

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CODEIGNITER BEGINNER

How to Build a Simple Blog in CodeIgniter 4 with MySQL and Bootstrap Tutorial

Learn how to build a fully functional blog application using CodeIgniter 4, MySQL, and Bootstrap 5 in this beginner-friendly tutorial. We walk through the complete process — from project installation and database migration to creating models, controllers, views, and routes. By the end, you will have a working blog with Create and Read functionality styled with Bootstrap, which you can extend with Update, Delete, authentication, and pagination for production use.

Role-Based Login System in CodeIgniter 4: Admin & User Roles – Best for Small Projects?

CODEIGNITER 4 LOGIN SYSTEM

ROLE BASED ACCESS CONTROL CODEIGNITER 4

CI4 ADMIN USER AUTHENTICATION

CODEIGNITER 4 RBAC TUTORIAL

BEST AUTH FOR SMALL PHP PROJECTS

CODEIGNITER SHIELD VS CUSTOM LOGIN

PHP FRAMEWORK AUTHENTICATION SMALL SCALE

CODEIGNITER 4 ROLE FILTER MIDDLEWARE

Role-Based Login System in CodeIgniter 4: Admin & User Roles – Best for Small Projects?

Securing user access is a critical step in any web application, especially when different users need different levels of control. CodeIgniter 4 (CI4), known for its lightweight footprint and speed, is an excellent choice for implementing role-based access control (RBAC) in small to mid-size projects. In this hands-on tutorial, we will build a complete role-based login system from scratch in CodeIgniter 4 — covering database setup with migrations, user authentication with hashed passwords, session-based role management, route-level middleware filters, and separate admin and user dashboards. Whether you are building a blog, internal tool, or small e-commerce app, this guide gives you full control over authentication without the overhead of third-party libraries.

How to Run CodeIgniter 4 with Docker and Docker Compose: Complete Tutorial with Code

CODEIGNITER 4 DOCKER

RUN CODEIGNITER DOCKER COMPOSE

CONTAINERIZE CODEIGNITER 4

CODEIGNITER PHP DOCKER TUTORIAL

DOCKER COMPOSE PHP MYSQL

CODEIGNITER APACHE DOCKER SETUP

CI4 CONTAINERIZATION GUIDE

PHP DOCKER APACHE TUTORIAL

How to Run CodeIgniter 4 with Docker and Docker Compose: Complete Tutorial with Code

In today's development landscape, containerization has become essential for building scalable and portable applications. CodeIgniter 4, a lightweight yet powerful PHP framework, pairs exceptionally well with Docker to create isolated, reproducible environments. This comprehensive guide walks you through setting up CodeIgniter 4 using Docker and Docker Compose — covering PHP 8.1, Apache, MySQL 8.0, environment variables, volumes, and networking. Whether you are deploying your first CI4 project or standardizing your team's workflow, this tutorial gives you a production-ready Docker setup with complete code examples and detailed explanations for every step.

CODEIGNITER4

PDF

TCPDF

Generate PDF in CodeIgniter 4 Using TCPDF – Complete Tutorial

PDF generation is essential for invoices, receipts, reports, and printable documents in web apps. CodeIgniter 4 doesn't include a native PDF library, so TCPDF (a robust, open-source PHP class) is a popular choice. This tutorial shows you how to integrate TCPDF in CodeIgniter 4 to generate dynamic PDFs from database data. We'll build a simple invoice system.

CODEIGNITER4

STRIPE

PAYMENTGATEWAY

CodeIgniter 4 Stripe Payment Gateway Integration – Payment Intents

Integrating a reliable and secure payment gateway is essential for any modern e-commerce application, membership site, or online service. In 2026, Stripe remains the #1 choice for developers worldwide due to its excellent documentation, global payment support, built-in fraud protection, and seamless compliance with PSD2, SCA, and 3D Secure standards.

CODEIGNITER 4

XML

SITEMAP

Create a Dynamic XML Sitemap in CodeIgniter 4 – Complete Tutorial

A dynamic XML sitemap in CodeIgniter 4 automatically lists your website's URLs (including posts, pages, or products) and helps search engines like Google discover and index content faster. This improves SEO, crawl efficiency, and visibility — especially for sites with frequently updated or database-driven content.

In this guide, you'll build a fully dynamic sitemap that pulls URLs from a database, includes metadata like lastmod, changefreq, and priority, and serves it at /sitemap.xml.

CodeIgniter 4 JWT Authentication: Complete Tutorial for Secure API Login & Register

CODEIGNITER 4 JWT API AUTHENTICATION

CODEIGNITER 4 LOGIN AND REGISTER WITH JWT

JWT

API

AUTHENTICATION

CodeIgniter 4 JWT Authentication: Complete Tutorial for Secure API Login & Register

Build a secure, token-based authentication system for your CodeIgniter 4 REST API using JWT (JSON Web Tokens). This stateless approach is ideal for mobile apps, SPAs, and microservices. We'll cover setup, user registration/login, token generation/validation, protected routes, and best practices.

CODEIGNITER 4

DATATABLES

CODEIGNITER 4 DATATABLES

AJAX DATATABLES

DATATABLE SERVER SIDE PROCESSING

Server-Side DataTables in CodeIgniter 4: Complete AJAX Tutorial

Server-side processing with DataTables is essential when dealing with large datasets in web applications. Instead of loading thousands of rows at once (client-side), DataTables sends AJAX requests to the server for each page, search, or sort — dramatically improving performance.

codeigniter-4 - Search Result

How to Build a Simple Blog in CodeIgniter 4 with MySQL and Bootstrap Tutorial

Role-Based Login System in CodeIgniter 4: Admin & User Roles – Best for Small Projects?

How to Run CodeIgniter 4 with Docker and Docker Compose: Complete Tutorial with Code

Generate PDF in CodeIgniter 4 Using TCPDF – Complete Tutorial

CodeIgniter 4 Stripe Payment Gateway Integration – Payment Intents

Create a Dynamic XML Sitemap in CodeIgniter 4 – Complete Tutorial

CodeIgniter 4 JWT Authentication: Complete Tutorial for Secure API Login & Register

Server-Side DataTables in CodeIgniter 4: Complete AJAX Tutorial

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