CodeIgniter 4 CRUD: A Complete Beginner Tutorial

CodeIgniter 4 is a lightweight, secure PHP framework perfect for building content sites and APIs. In this tutorial we build a full CRUD flow.

Step 1 — Create a migration

php spark make:migration CreatePosts

Step 2 — Define the model

Models handle validation and database access safely through the query builder.

Step 3 — Secure your forms

Always use form_open() so the CSRF token is injected automatically.

Escape all output with esc() and bind every value through the query builder to prevent SQL injection.