Complete CodeIgniter 4 Framework with Bootstrap Admin Panel

Learn how to set up a code editor for CodeIgniter 4 and perform a manual installation, including downloading, unzipping, configuring folders, and running on localhost.

Install CodeIgniter 4 framework using composer and compare it with manual installation. Verify composer on your system, then scaffold an app with composer create-project.

Launch the local development server for CodeIgniter 4 apps with the Spark CLI. Run app one and app two in dev mode, switch to production, and stop with Ctrl+C.

Explore the CodeIgniter 4 framework folder architecture, including app and system folders, vendor and framework roots, and key components like controllers, models, migrations, and public assets.

Explore how to configure CodeIgniter 4 with a .env environment file, set production and development values, and customize app, database, and session settings using environment variables.

Discover how CodeIgniter 4 maps the default route to the home controller’s index method and renders via the welcome_message view, with system and app configs guiding the setup.

Explore how CodeIgniter 4 controllers mediate between models and views, declared under app/controllers, and mapped via routes to index and other methods.

Load a view file from a controller using return view('path/to/view', $data). Organize views in a lowercase folder named after the controller inside the views directory, e.g., site/index.php and site/about_us.php.

Learn two ways to pass dynamic values from a controller to a view in CodeIgniter 4: via a data array and via the compact function, using name, auto, and email.

Explore conditional blocks and loops in CodeIgniter 4 views, printing messages from controller values using if, else, and foreach syntax for lists in Bootstrap admin panel.

Learn how to load multiple views in CodeIgniter 4, using header, footer, and dynamic content via a controller, with MVC-friendly templates and data passing.

Learn how to create and load a reusable layout in CodeIgniter 4 by extending a layout in views, defining header, body, and footer sections, and injecting dynamic content from controllers.

Learn to load global and per-view assets in a CodeIgniter 4 bootstrap admin panel. Use layout inheritance and helper functions like link_tag and script_tag to attach CSS and JS.

Learn to extract shared UI into a navigation menu partial and include it in a CodeIgniter 4 layout, enabling reuse across views and simplifying maintenance.

Discover how to configure a CodeIgniter 4 development environment using the .env file, including renaming, uncommenting options, and enabling detailed debug messages for easier error tracking.

Explore closure routes in CodeIgniter 4 using anonymous callbacks to test behavior without controllers. Return a view from a route by creating a view file to display a static message.

Learn how to configure and test available route methods in CodeIgniter 4, including get, post, put, delete, and the add method to generate routes for a Bootstrap admin panel.

Learn how to configure namespaces in CodeIgniter routes to organize admin controllers, create route groups, and call methods like message, message2, and message3.

Learn how to create and call named routes in CodeIgniter 4, assigning custom names to routes and using them in views and links within a bootstrap admin panel setup.

Explore parameterized routes in a CodeIgniter 4 app, defining placeholders for one or two parameters and applying segment rules for alphabetic, numeric, and alphanumeric values.

Learn how to pass and retrieve query string parameters in CodeIgniter 4 routes using the get method, accessing keys like user id and email, and route to controller methods.

Learn how to configure a CodeIgniter 4 database using either the database.php file or the .env environment file, and run a first query to list users.

Explore raw queries in CodeIgniter 4 by inserting, updating, and deleting users, including database connection, escaping inputs, and building queries with both full and column-specific values.

Explore fetching raw SQL in CodeIgniter 4 and converting results to object or array formats with get_result and get_result_array, handling single or multiple rows.

Learn how to use query helper methods in CodeIgniter 4 to insert data, retrieve the last inserted id, measure affected rules, and generate raw queries with get last query.

Create and use the query builder in CodeIgniter 4 to fetch data from the users table, compare raw queries with method chaining, and retrieve results with the get method.

Learn how to use the query builder class to add where conditions, or where, in, and like filters, select specific columns, and execute queries in CodeIgniter 4.

Learn how to insert data into a table using CodeIgniter 4's query builder, including single-row insertion and insert batch for multiple rows, with field mappings and last query verification.

Explore updating a table row with CodeIgniter 4's query builder by setting updated name and email and applying a condition on the primary key, avoiding raw queries.

Learn how to delete data with the CodeIgniter 4 query builder: delete specific rows, delete all, or empty a table; understand how truncate resets auto-increment.

Explore how the CodeIgniter 4 query builder uses inner, left, and right joins to combine users and courses in MySQL, showing join conditions and result sets.

Explore CodeIgniter 4 models that enable CRUD operations, automatic database connections, and pagination. Learn how to declare and load models in controllers.

Configure a CodeIgniter 4 model by declaring protected member variables for table name, primary key, and timestamps, and define validation rules and messages to manage user data and output formats.

Explore how to use CodeIgniter 4 models to fetch data with find all, find, or conditional queries, select specific columns, and order results, returning arrays or objects.

Explore insert, update, and delete operations using a CodeIgniter 4 model, including insert, update, and save methods, to perform CRUD via primary keys.

explore how entities represent a single database row in CodeIgniter 4, create an entity class, extend the base entity, and use it with models to manage data as entities.

Explore the data map feature in CodeIgniter 4 to map updated names. See how mapping enables insert and display with updated names like full name and email address.

Discover how entity mutators in CodeIgniter 4 automatically hash passwords before insertion and transform fields, such as names, to uppercase for secure, consistent data storage.

Learn how entity accessors and mutators in CodeIgniter 4 transform data, such as converting emails to uppercase and replacing spaces with underscores, before insertion and output.

Explore how to define virtual properties in CodeIgniter 4 entity to create a full name by concatenating first name and last name, and access them in models and controllers.

Master CodeIgniter 4 form helper basics to build forms in controllers and views with form open and close, and create inputs, textareas, hidden fields, and submit buttons.

Build a codeigniter 4 form with the form helper to collect name, email, phone, and password. Save via a model and entity with a mutator to hash the password.

Learn how to set and display flash messages using the session service in a CodeIgniter 4 app with a bootstrap admin panel, including post-redirect workflow after saving form data.

Load the cookie helper in CodeIgniter 4 and use set_cookie, get_cookie, and delete_cookie to manage cookies, including expiry and browser-session behavior.

Explore the html helper in CodeIgniter 4 to load images, stylesheets, and scripts using image(), link_tag(), and script_tag(), leveraging the base URL and public assets.

Explore how the CodeIgniter 4 URL helper powers site_url and base_url, enabling route creation, asset inclusion, and cookie-based navigation in a bootstrap admin panel.

Learn how to create and use user defined helpers in CodeIgniter 4, by placing files in app/helpers, defining procedural functions, and loading them in a controller.

Learn to use the CodeIgniter 4 curl request service to call a dummy json placeholder API, set request headers, handle status codes, decode JSON, and display post titles and bodies.

Implement pagination in a CodeIgniter 4 app using the pager service to display five user records per page, generate page links, and pass the data to a Bootstrap-styled view.

Learn how to manage session data in CodeIgniter 4 using get, set, push, remove, and destroy methods to store, add values, and clear user data in a bootstrap admin panel.

Master file uploads in CodeIgniter 4 by using store and move methods, uploading to public or uploads directories, configuring multipart forms, and retrieving the uploaded file’s name and type.

Explore server-side form validation in CodeIgniter 4 by using the validation service to enforce required fields for name and email, defining rules, and displaying errors in the view.

Apply validation rules for a form in CodeIgniter 4, including required fields, min and max lengths, valid email, and password match. Learn to configure per-field rules and reference the documentation.

Learn to customize validation error messages in a CodeIgniter 4 app with a bootstrap admin panel, tailoring per-field messages for name, email, and passwords and displaying errors beside inputs.

Create a custom rule in CodeIgniter 4 validation to verify the email address and password against the database, with custom messages in a Bootstrap admin panel login form.

Create a custom user rule in CodeIgniter 4 by defining a validation rule to verify email existence and password with the user model, then wire it into the validation config.