Backend CodeIgniter Controllers

When to use this skill

• Creating API endpoints
• Handling HTTP requests
• RESTful controllers
• Resource controllers

Workflow

• ] Extend ResourceController for REST
• ] Keep controllers thin
• ] Validate input
• ] Return appropriate responses
• ] Handle errors properly

Instructions

REST Controller

php
<?php

namespace App\Controllers;

use CodeIgniter\RESTful\ResourceController;

class UserController extends ResourceController
{
    protected $modelName = 'App\Models\UserModel';
    protected $format = 'json';

    public function index()
    {
        return $this->respond($this->model->findAll());
    }

    public function show($id = null)
    {
        $user = $this->model->find($id);
        if (!$user) {
            return $this->failNotFound();
        }
        return $this->respond($user);
    }

    public function create()
    {
        $rules = ['email' => 'required|valid_email'];
        if (!$this->validate($rules)) {
            return $this->failValidationErrors($this->validator->getErrors());
        }

        $id = $this->model->insert($this->request->getJSON(true));
        return $this->respondCreated(['id' => $id]);
    }
}

Resources

• Use ResourceController for REST
• Validate all input
• Return proper HTTP status