CodeIgniter
CodeIgniter is a lightweight PHP web framework known for its small footprint, straightforward MVC architecture, and strong runtime performance compared to larger, more feature-heavy frameworks.
Definition
CodeIgniter is a lightweight PHP web framework known for its small footprint, straightforward MVC architecture, and strong runtime performance compared to larger, more feature-heavy frameworks.
Overview
CodeIgniter was built around a simple premise: give PHP developers a Model-View-Controller structure and the common conveniences of a framework — routing, form validation, database abstraction, sessions — without the overhead and steep learning curve that come with larger frameworks. Its small core and minimal configuration requirements have made it a popular choice for projects that need to be fast to set up and fast to run, often deployed behind a traditional web server like Apache HTTP Server or Nginx. Compared to a full-featured framework like Laravel, CodeIgniter deliberately does less out of the box, favoring plain PHP and straightforward conventions over heavier abstractions like an expressive query builder-driven ORM or built-in queueing. This makes it well suited to shared hosting environments and projects where server resources or dependency footprint are a real constraint, and it remains popular for shops with existing PHP investments who want an incremental upgrade path rather than a rewrite. CodeIgniter connects to relational databases such as MySQL through its own database abstraction layer, and — like other PHP frameworks — commonly powers content-driven sites, internal tools, and APIs where developer familiarity with plain PHP and predictable performance matter more than an expansive built-in feature set.
Key Features
- Lightweight MVC architecture with a small core footprint
- Minimal configuration required to get a project running
- Fast runtime performance relative to heavier PHP frameworks
- Built-in database abstraction layer supporting common databases
- Form validation, session handling, and security helper libraries
- Works well on shared or resource-constrained hosting environments
- Straightforward learning curve for developers familiar with plain PHP