Codeigniter Beginner Guide

Introduce

This repository provides guides to CodeIgniter 4, including learning topics, steps, and examples.

Learning Examples

Topic	Learning Files
Routes	Create route at Routes.php
Database Configuration	Set up your database connection in Database.php or copy the env file, rename it to .env, and update the DATABASE section.
CRUD	Sample CRUD operations with Blogs: - Controller: List of method actions - Model: Available properties - Views: Form validation and session error display - Migration: Table and column setup - Seeder: Data seeding with Faker for development
Custom Form Validation	- Controller: Defines validation rules and handles form validation - Ruleset: Custom validation rules for product attributes - Config: Registers the new ruleset
Session Storage	- Config: Session configuration settings - Controller: Examples of session handling, flashdata, and tempdata operations
Filters	- Config: Define filter aliases - Routes: Apply filters to route groups - AuthFilter: Custom authentication filter to check login status
Helpers	- Autoload.php: Load helpers automatically - BaseController.php: Load helpers in the base controller - customize_helper.php: Example helper functions (array flattening and date formatting)
File Upload	- Routes: Define routes for file upload functionality - View: HTML form for file upload - Controller: Handle file upload logic and validation
RestAPI	- Routes: Define RESTful routes for the API - Controller: Implement RESTful API methods (index, show, create, update, delete) for handling blog resources - Testing Endpoints: Use a tool like Postman:     - GET /blogs: List all blogs     - GET /blogs/{id}: Get a single blog     - POST /blogs: Create a new blog     - PUT /blogs/{id}: Update a blog     - DELETE /blogs/{id}: Delete a blog

Error Page

Page	Path
Error 404	error_404.php
Production Error	production.php

Useful Commands

Command	Description
php spark serve	Start the local development server.
php spark make:controller Name	Create a new controller named Name.
php spark make:model Name	Create a new model named Name.
php spark make:migration Name	Create a new migration file named Name.
php spark migrate	Run all new migrations.
php spark migrate:rollback	Rollback the last migration operation.
php spark db:seed NameSeeder	Run the database seeder named NameSeeder.
php spark make:seeder Name	Create a new database seeder named Name.
php spark make:filter Name	Create a new filter named Name.
php spark make:entity Name	Create a new entity named Name.
php spark make:command Name	Create a new custom command named Name.
php spark make:scaffold Name	Create a scaffold (controller, model, views) named Name.
php spark make:cell Name	Create a new cell view named Name.
php spark env	Display the current environment settings.
php spark cache:clear	Clear the application cache.
php spark clear-cache	Another command to clear the application cache.
php spark routes	Display the list of all registered routes.
php spark help	Display help information for spark commands.
php spark --list	List all available spark commands.

Coding Standard

Install PHP_CodeSniffer and coding-standard

composer require --dev squizlabs/php_codesniffer
composer require --dev codeigniter/coding-standard

Run PHP_CodeSniffer

vendor/bin/php-cs-fixer fix --verbose

Automate Code Fixes (Optional)

To run phpcbf on a specific file, provide the path to the file:

vendor/bin/phpcbf app/Controllers/Home.php

Target Specific Directories or Files

vendor/bin/phpcbf app public tests system

For details:

vendor/bin/phpcbf --help