Getting started with CodeIgniter 4 (CI4) is a streamlined process, as the framework maintains its reputation for being lightweight and easy to set up. To perform a , you can choose between a modern, package-managed installation or a traditional manual setup. System Requirements for CodeIgniter 4
The official CodeIgniter User Guide recommends using because it simplifies future updates. Server Requirements — CodeIgniter 4.7.2 documentation codeigniter 4 download
PHP 8.1 or newer (including support for PHP 8.4). Getting started with CodeIgniter 4 (CI4) is a
You must enable intl , mbstring , json , and xml in your php.ini file. Server Requirements — CodeIgniter 4
Supports MySQL (5.1+), PostgreSQL (7.4+), SQLite3, and MS SQL Server (2012+). Option 1: Recommended Composer Installation
Before downloading, ensure your server environment is ready. As of early 2026, CI4 is designed for modern PHP environments: