PHP OOP and CodeIgniter Framework is a course in object-oriented PHP 8.5, connecting to MySQL, MariaDB and SQL Server through PDO, then using CodeIgniter 4.7 to build web applications and REST APIs secured with Shield. It suits developers who already write PHP and teams maintaining older CodeIgniter systems who want a clear, modern structure.
Most PHP work in organisations does not start from scratch. Teams extend existing systems, connect to several kinds of database and expose APIs for other systems to call. Object-oriented code splits a system into parts with clear responsibilities, and CodeIgniter is a lightweight framework that is quick to learn and easy to install on ordinary hosting, so it suits teams that want a tidy MVC structure without the complexity of a larger framework.
This course starts with the object-oriented PHP 8.5 you need to use a framework well, including classes, interfaces, traits, enums and exceptions, then connects to MySQL, MariaDB and Microsoft SQL Server through PDO. Learners then use CodeIgniter 4.7 to build a web application and REST API covering routing, controllers, models, entities, migrations and validation, secure the API with Shield and call external services. The course closes with a product management workshop including tests and deployment. (2 days, 6 hours per day, 12 hours in total, Intermediate level.)
Course Details
This course is the 2026 edition of PHP OOP and CodeIgniter Framework. It runs for 2 days, 6 hours per day (12 hours in total, 09:00-16:00), as lectures with labs and a workshop. Intermediate level. This edition uses PHP 8.5 and CodeIgniter 4.7, drops the PHP ActiveRecord library, which is no longer maintained, in favour of CodeIgniter models and entities, and adds migrations, Shield, API pagination and
transformers, feature tests and deployment. It still connects to MySQL, MariaDB and Microsoft SQL Server through PDO. The course teaches the object-oriented PHP you need for a framework, unlike PHP OOP and MySQL, which goes deep into SOLID and design patterns. Every lab runs on the learner's own machine with Docker and open source tools. Learners take home a lab guide, source code for every lab and their workshop project.
Section 1: Lab: Setting Up Tools and a PHP 8.5 Project
Section 2: Classes, Objects and Encapsulation
Section 3: Lab: Inheritance, Interfaces and Traits
Section 4: Namespaces, Enums and Exceptions
Section 5: Lab: PDO with MySQL and MariaDB
Section 6: Lab: PDO with Microsoft SQL Server
Section 7: Lab: Getting Started with CodeIgniter 4.7
Section 8: Controllers, Views and Validation
Section 9: Lab: Models, Entities and Migrations
Section 10: Lab: REST APIs with ResourceController
Section 11: Security and Third-Party Services
Section 12: Workshop: Product Management System with an API
No public rounds are open right now. Join the waiting list and we will contact you first when the next round opens, or ask us on LINE. Or call 02-570-8449 or 088-807-9770
An abstract class is a parent class that cannot be instantiated. It can hold implemented methods, properties and abstract methods that child classes must complete, and a class can extend only one. An interface only declares the methods a class must provide, and a class can implement several. Frameworks such as CodeIgniter use interfaces to define contracts between components, which makes them easy to swap and test.
PDO (PHP Data Objects) is an object-oriented database layer that works the same way across databases such as MySQL, MariaDB and SQL Server; you change only the DSN and driver. For SQL Server you first install the Microsoft Drivers for PHP for SQL Server and the ODBC driver. Its key benefit is prepared statements, which keep SQL separate from user input and prevent SQL injection.
Install CodeIgniter 4 with Composer, configure the database in the .env file, create tables with migrations and add a model. Then create a controller that extends ResourceController, which provides the standard index, show, create, update and delete methods. Register the routes with $routes->resource, use ResponseTrait to return JSON with correct HTTP status codes, paginate with paginate(), protect the API with Shield access tokens and test every endpoint in Postman.
Not directly, because CodeIgniter 4 is a complete rewrite. It uses namespaces, installs through Composer, separates the public folder from the code and changes how models, libraries and configuration work. The usual approach is to create a new CodeIgniter 4 project and move controllers, models and views across one part at a time following the upgrade guide, testing as you go. This course covers the OOP and CodeIgniter 4 structure you need for such a move.
It suits developers who already write PHP and want to write object-oriented code with a framework, teams maintaining older CodeIgniter systems, developers who connect PHP to SQL Server and MySQL, and IT managers choosing an approach for their team. You should be able to write PHP with variables, conditions, loops, arrays and functions, write basic SQL and know some HTML.
Yes. It can be run in-house for your team, with examples adapted to your work, such as using the database your organisation already runs or planning a move from CodeIgniter 3 to CodeIgniter 4. You can request a quotation from this page, or contact us on LINE @itgenius or by phone on 02-570-8449.
Articles are published in Thai.
PHP and MySQL still power a great many websites, from internal back-office systems and sites built on WordPress to frameworks such as Laravel. Understanding PHP and databases from the ground up is therefore a good way into web development. Yet much of the…
PHP and MySQL still power a great many websites and business systems, yet much of the sample code around is written the old way: SQL built by joining strings, passwords stored unsafely, functions that have since been removed, or jQuery for everything. Sites…
Many PHP websites start as procedural code that is quick to write and easy to follow. As the system grows, functions end up scattered across every file, SQL is mixed with HTML, and a change in one place breaks several others until nobody dares to touch it.…
