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About Developer

Khamisi Kibet

Khamisi Kibet

Software Developer

I am a computer scientist, software developer, and YouTuber, as well as the developer of this website, spinncode.com. I create content to help others learn and grow in the field of software development.

If you enjoy my work, please consider supporting me on platforms like Patreon or subscribing to my YouTube channel. I am also open to job opportunities and collaborations in software development. Let's build something amazing together!

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    infor@spinncode.com

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    Nairobi, Kenya
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2 Months ago | 35 views

**Course Title:** Mastering CodeIgniter Framework: Fast, Lightweight Web Development **Section Title:** Authentication and Authorization in CodeIgniter **Topic:** Create a user authentication system with role-based access control and secure login functionality (Lab topic) **Introduction** In the previous topics, we covered the basics of CodeIgniter, its development setup, and the MVC architecture. Now, it's time to dive into a crucial aspect of web development: authentication and authorization. In this lab topic, we will create a comprehensive user authentication system with role-based access control and secure login functionality using CodeIgniter. **Why Authentication and Authorization Matter** Authentication is the process of verifying a user's identity, while authorization is the process of determining what actions a user can perform after authentication. A well-designed authentication and authorization system is crucial for safely managing user access to your web application. Without it, malicious users could exploit vulnerabilities, steal sensitive information, or perform unauthorized actions, leading to security breaches, data loss, or even DDoS attacks. **Creating a User Authentication System with CodeIgniter** In this topic, we will cover the following key concepts: 1. **User registration and login functionality** 2. **Role-based access control** 3. **Secure login functionality** **Step 1: User Registration and Login Functionality** To create a user authentication system, we will use CodeIgniter's built-in user authentication class, `User`. We will also use a MySQL database to store user information. ### database/schema.php (example) ```php <?php defined('BASEPATH') OR die(); class Database extends CI_DB { function users_table() { $this->dbforge->add_field('id', 'int', array('auto_increment' => TRUE)); $this->dbforge->add_field('username', 'varchar'); $this->dbforge->add_field('password', 'varchar'); $this->dbforge->add_field('email', 'varchar'); $this->dbforge->create_table('users', TRUE); } } ?> ``` ### controllers/User.php (example) ```php <?php defined('BASEPATH') OR die(); class User extends CI_Controller { public function __construct() { parent::__construct(); $this->load->model('User_model'); } public function register() { $this->load->view('register_view'); } public function login() { $username = $this->input->post('username'); $password = $this->input->post('password'); $user = $this->User_model->user_login($username, $password); if ($user) { $session->set_userdata('user_id', $user->id); redirect('home'); } else { redirect('login'); } } public function logout() { $session->unset_userdata('user_id'); redirect('login'); } } ?> ``` ### models/User_model.php (example) ```php <?php defined('BASEPATH') OR die(); class User_model extends CI_MODEL { function user_login($username, $password) { $query = $this->db->get_where('users', array('username' => $username), 1); if ($query->num_rows() > 0) { $row = $query->row(); if (password_verify($password, $row->password)) { return $row; } } return FALSE; } } ?> ``` ### views/register_view.php (example) ```php <?php Sessions::init(); ?> <!DOCTYPE html> <html> <head> <title>Register</title> </head> <body> <h1>Register</h1> <form action="<?= site_url('user/register') ?>" method="post"> <label>Username:</label> <input type="text" name="username" required> <br> <label>Password:</label> <input type="password" name="password" required> <br> <input type="submit" value="Register"> </form> </body> </html> ``` ### models/rol.php (example) ```php <?php defined('BASEPATH') OR die(); class Role extends CI_MODEL { function get_roles() { $query = $this->db->get('roles'); return $query->result(); } } ?> ``` ### views/login_view.php (example) ```php <?php Sessions::init(); ?> <!DOCTYPE html> <html> <head> <title>Login</title> </head> <body> <h1>Login</h1> <form action="<?= site_url('user/login') ?>" method="post"> <label>Username:</label> <input type="text" name="username" required> <br> <label>Password:</label> <input type="password" name="password" required> <br> <input type="submit" value="Login"> </form> </body> </html> ``` **Step 2: Role-Based Access Control** To implement role-based access control, we will use CodeIgniter's `EARLYautoload.php` to include the `version` class, which provides access to a core controller that handles role-based access control. ### controllers/Version.php (example) ```php <?php defined('BASEPATH') OR die(); class Version extends CI_Controller { public function index() { $this->load->model('Version_model'); $roles = $this->Version_model->get_roles(); // use $roles to control access to certain pages or actions } } ?> ``` ### models/Version_model.php (example) ```php <?php defined('BASEPATH') OR die(); class Version_model extends CI_MODEL { function get_roles() { $query = $this->db->get('roles'); return $query->result(); } } ?> ``` **Step 3: Secure Login Functionality** To ensure secure login functionality, we will use a combination of hashing and salting passwords, timing-safe password hashing, and secure password input validation. ### models/Hashing.php (example) ```php <?php defined('BASEPATH') OR die(); class Hashing extends CI_Model { function hash_password($password) { $salt = bin2hex(random_bytes(32)); $salted_password = $this->dbforge->hash(password_hash($password, PASSWORD_DEFAULT), $salt); return $salted_password; } } ?> ``` ### controllers/Login.php (example) ```php <?php defined('BASEPATH') OR die(); class Login extends CI_Controller { public function __construct() { parent::__construct(); $this->load->model('Hashing'); } public function login() { $username = $this->input->post('username'); $password = $this->input->post('password'); $hashed_password = $this->Hashing->hash_password($password); $query = $this->db->get_where('users', array('username' => $username), 1); if ($query->num_rows() > 0) { $row = $query->row(); if (password_verify($hashed_password, $row->password)) { $session->set_userdata('user_id', $row->id); redirect('home'); } } redirect('login'); } } ?> ``` This concludes our lab topic on creating a user authentication system with role-based access control and secure login functionality using CodeIgniter. By following this guide, you should now have a solid understanding of how to design and implement a secure authentication system for your website or application. **Final Takeaway:** * Create a comprehensive user authentication system using CodeIgniter's built-in authentication class and a MySQL database. * Implement role-based access control using a separate model for managing roles. * Use secure password hashing and salting to protect user passwords. * Write secure code by following best practices for user input validation and timing-safe password hashing.
Course

Authenticating and Authorizing Users in CodeIgniter

**Course Title:** Mastering CodeIgniter Framework: Fast, Lightweight Web Development **Section Title:** Authentication and Authorization in CodeIgniter **Topic:** Create a user authentication system with role-based access control and secure login functionality (Lab topic) **Introduction** In the previous topics, we covered the basics of CodeIgniter, its development setup, and the MVC architecture. Now, it's time to dive into a crucial aspect of web development: authentication and authorization. In this lab topic, we will create a comprehensive user authentication system with role-based access control and secure login functionality using CodeIgniter. **Why Authentication and Authorization Matter** Authentication is the process of verifying a user's identity, while authorization is the process of determining what actions a user can perform after authentication. A well-designed authentication and authorization system is crucial for safely managing user access to your web application. Without it, malicious users could exploit vulnerabilities, steal sensitive information, or perform unauthorized actions, leading to security breaches, data loss, or even DDoS attacks. **Creating a User Authentication System with CodeIgniter** In this topic, we will cover the following key concepts: 1. **User registration and login functionality** 2. **Role-based access control** 3. **Secure login functionality** **Step 1: User Registration and Login Functionality** To create a user authentication system, we will use CodeIgniter's built-in user authentication class, `User`. We will also use a MySQL database to store user information. ### database/schema.php (example) ```php <?php defined('BASEPATH') OR die(); class Database extends CI_DB { function users_table() { $this->dbforge->add_field('id', 'int', array('auto_increment' => TRUE)); $this->dbforge->add_field('username', 'varchar'); $this->dbforge->add_field('password', 'varchar'); $this->dbforge->add_field('email', 'varchar'); $this->dbforge->create_table('users', TRUE); } } ?> ``` ### controllers/User.php (example) ```php <?php defined('BASEPATH') OR die(); class User extends CI_Controller { public function __construct() { parent::__construct(); $this->load->model('User_model'); } public function register() { $this->load->view('register_view'); } public function login() { $username = $this->input->post('username'); $password = $this->input->post('password'); $user = $this->User_model->user_login($username, $password); if ($user) { $session->set_userdata('user_id', $user->id); redirect('home'); } else { redirect('login'); } } public function logout() { $session->unset_userdata('user_id'); redirect('login'); } } ?> ``` ### models/User_model.php (example) ```php <?php defined('BASEPATH') OR die(); class User_model extends CI_MODEL { function user_login($username, $password) { $query = $this->db->get_where('users', array('username' => $username), 1); if ($query->num_rows() > 0) { $row = $query->row(); if (password_verify($password, $row->password)) { return $row; } } return FALSE; } } ?> ``` ### views/register_view.php (example) ```php <?php Sessions::init(); ?> <!DOCTYPE html> <html> <head> <title>Register</title> </head> <body> <h1>Register</h1> <form action="<?= site_url('user/register') ?>" method="post"> <label>Username:</label> <input type="text" name="username" required> <br> <label>Password:</label> <input type="password" name="password" required> <br> <input type="submit" value="Register"> </form> </body> </html> ``` ### models/rol.php (example) ```php <?php defined('BASEPATH') OR die(); class Role extends CI_MODEL { function get_roles() { $query = $this->db->get('roles'); return $query->result(); } } ?> ``` ### views/login_view.php (example) ```php <?php Sessions::init(); ?> <!DOCTYPE html> <html> <head> <title>Login</title> </head> <body> <h1>Login</h1> <form action="<?= site_url('user/login') ?>" method="post"> <label>Username:</label> <input type="text" name="username" required> <br> <label>Password:</label> <input type="password" name="password" required> <br> <input type="submit" value="Login"> </form> </body> </html> ``` **Step 2: Role-Based Access Control** To implement role-based access control, we will use CodeIgniter's `EARLYautoload.php` to include the `version` class, which provides access to a core controller that handles role-based access control. ### controllers/Version.php (example) ```php <?php defined('BASEPATH') OR die(); class Version extends CI_Controller { public function index() { $this->load->model('Version_model'); $roles = $this->Version_model->get_roles(); // use $roles to control access to certain pages or actions } } ?> ``` ### models/Version_model.php (example) ```php <?php defined('BASEPATH') OR die(); class Version_model extends CI_MODEL { function get_roles() { $query = $this->db->get('roles'); return $query->result(); } } ?> ``` **Step 3: Secure Login Functionality** To ensure secure login functionality, we will use a combination of hashing and salting passwords, timing-safe password hashing, and secure password input validation. ### models/Hashing.php (example) ```php <?php defined('BASEPATH') OR die(); class Hashing extends CI_Model { function hash_password($password) { $salt = bin2hex(random_bytes(32)); $salted_password = $this->dbforge->hash(password_hash($password, PASSWORD_DEFAULT), $salt); return $salted_password; } } ?> ``` ### controllers/Login.php (example) ```php <?php defined('BASEPATH') OR die(); class Login extends CI_Controller { public function __construct() { parent::__construct(); $this->load->model('Hashing'); } public function login() { $username = $this->input->post('username'); $password = $this->input->post('password'); $hashed_password = $this->Hashing->hash_password($password); $query = $this->db->get_where('users', array('username' => $username), 1); if ($query->num_rows() > 0) { $row = $query->row(); if (password_verify($hashed_password, $row->password)) { $session->set_userdata('user_id', $row->id); redirect('home'); } } redirect('login'); } } ?> ``` This concludes our lab topic on creating a user authentication system with role-based access control and secure login functionality using CodeIgniter. By following this guide, you should now have a solid understanding of how to design and implement a secure authentication system for your website or application. **Final Takeaway:** * Create a comprehensive user authentication system using CodeIgniter's built-in authentication class and a MySQL database. * Implement role-based access control using a separate model for managing roles. * Use secure password hashing and salting to protect user passwords. * Write secure code by following best practices for user input validation and timing-safe password hashing.

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Mastering CodeIgniter Framework: Fast, Lightweight Web Development

Course

Objectives

  • Understand the CodeIgniter framework and its architecture.
  • Build scalable and secure web applications using CodeIgniter.
  • Master database operations using CodeIgniter's Query Builder and Active Record.
  • Develop RESTful APIs and integrate third-party services.
  • Implement best practices for security, testing, and version control in CodeIgniter projects.
  • Deploy CodeIgniter applications to cloud platforms like AWS, DigitalOcean, etc.
  • Use modern tools such as Docker, Git, and Composer for dependency management.

Introduction to CodeIgniter and Development Setup

  • Overview of CodeIgniter and its features.
  • Setting up the development environment (PHP, CodeIgniter, Composer).
  • Understanding the MVC architecture in CodeIgniter.
  • Exploring CodeIgniter's directory structure.
  • Lab: Install CodeIgniter, set up a project, and configure the environment.

Routing, Controllers, and Views in CodeIgniter

  • Understanding CodeIgniter’s routing system.
  • Creating and organizing controllers for application logic.
  • Building views using CodeIgniter’s templating system.
  • Passing data between controllers and views.
  • Lab: Create a basic CodeIgniter application with dynamic routes, controllers, and views.

Database Integration with CodeIgniter

  • Connecting CodeIgniter to a MySQL/MariaDB database.
  • Introduction to CodeIgniter’s Query Builder for CRUD operations.
  • Using CodeIgniter’s Active Record for database interactions.
  • Managing database migrations and schema changes.
  • Lab: Create a database-driven application using CodeIgniter’s Query Builder for CRUD operations.

Forms, Validation, and Session Management

  • Handling forms and user input in CodeIgniter.
  • Implementing form validation using CodeIgniter’s validation library.
  • Managing sessions and cookies for user authentication.
  • Preventing common security vulnerabilities (XSS, CSRF).
  • Lab: Build a form that includes validation, session management, and secure user input handling.

Building RESTful APIs with CodeIgniter

  • Introduction to REST API principles.
  • Creating RESTful APIs in CodeIgniter with routes and controllers.
  • Handling JSON requests and responses.
  • API authentication methods (tokens, OAuth).
  • Lab: Build a RESTful API for a task management application with JSON responses and basic authentication.

Working with Models and Database Relationships

  • Creating models for handling business logic and database interactions.
  • Managing relationships between database tables (one-to-one, one-to-many).
  • Optimizing database queries with eager loading and joins.
  • Working with CodeIgniter’s caching features to improve performance.
  • Lab: Implement models and relationships for a blog system with optimized queries.

Authentication and Authorization in CodeIgniter

  • Setting up user authentication using CodeIgniter’s session library.
  • Building a registration, login, and password reset system.
  • Role-based access control (RBAC) using middleware and user roles.
  • Best practices for securing authentication routes.
  • Lab: Create a user authentication system with role-based access control and secure login functionality.

Testing and Debugging in CodeIgniter

  • Importance of testing in modern web development.
  • Using CodeIgniter’s testing tools (PHPUnit).
  • Writing unit tests for controllers, models, and services.
  • Debugging CodeIgniter applications using logging and error handling.
  • Lab: Write unit tests for a CodeIgniter application and troubleshoot common bugs using debugging tools.

File Handling and Image Uploads

  • Using CodeIgniter’s file upload class for handling file uploads.
  • Validating and securing file uploads (file types, size limits).
  • Image processing (resizing, cropping) using CodeIgniter’s image manipulation library.
  • Storing files locally and integrating cloud storage (AWS S3).
  • Lab: Build a file upload system that validates and stores files, integrating cloud storage for scalability.

Version Control, Deployment, and CI/CD

  • Using Git for version control in CodeIgniter projects.
  • Collaborating on projects using GitHub and Git branching strategies.
  • Deploying CodeIgniter applications to cloud services (AWS, DigitalOcean).
  • Setting up CI/CD pipelines for automated testing and deployment using GitHub Actions or GitLab CI.
  • Lab: Set up version control for a CodeIgniter project, deploy it to a cloud platform, and configure CI/CD for automated testing and deployment.

Advanced CodeIgniter Features: Hooks, Events, and Custom Libraries

  • Using CodeIgniter’s hooks for extending core functionality.
  • Creating and handling custom events in a CodeIgniter application.
  • Building custom libraries to encapsulate reusable functionality.
  • Best practices for code reuse and modularity in large projects.
  • Lab: Implement a custom event-driven system in CodeIgniter using hooks and libraries.

Final Project and Scalability Techniques

  • Building scalable CodeIgniter applications.
  • Optimizing performance with caching, database indexing, and pagination.
  • Best practices for CodeIgniter in production (error handling, logging, security).
  • Q&A and troubleshooting session for final project work.
  • Lab: Begin working on the final project, integrating all learned techniques to build a complete web application.

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