PHP MVC Architecture

The Model-View-Controller (MVC) architecture is a design pattern that separates an application into three interconnected components, namely Model, View, and Controller. This architecture is widely used in web development to keep the code more organized, easy to maintain, and to achieve a better separation of concerns.

Syntax

class ModelName {
  // model code here
}

class ViewName {
  // view code here
}

class ControllerName {
  // controller code here
}

Example

// Model
class UserModel
{
  public function getUserDetails($userId)
  {
    // fetch user data from database and return it
  }
}

// View
class UserView
{
  public function render($userData)
  {
    // display user details to the user
  }
}

// Controller
class UserController
{
  private $model;

  public function __construct(UserModel $model)
  {
    $this->model = $model;
  }

  public function getUser($userId)
  {
    $userData = $this->model->getUserDetails($userId);
    $view = new UserView();
    $view->render($userData);
  }
}

// Usage
$model = new UserModel();
$controller = new UserController($model);
$controller->getUser(1);

Output

This code does not have any output as it is just an example of the PHP MVC architecture.

Explanation

In the above example, the Model represents the database-related operations, the View represents the user interface (UI) logic, and the Controller acts as an intermediary between the Model and the View.

When the getUser method of the UserController class is called with a particular $userId, it retrieves the user details from the database using the getUserDetails method of the UserModel class. Then it creates an instance of the UserView class to display the user details to the user.

This separation allows for better code organization and makes it easier to maintain and test the code.

Use

The MVC architecture is commonly used in web development with PHP to separate the application code into three components, Model, View, and Controller, for better code organization and maintainability.

Important Points

• The Model should encapsulate the business logic and handle all database-related operations.
• The View should contain the presentation logic and handle all UI-related tasks such as rendering HTML pages, displaying data, and receiving user input.
• The Controller should act as an intermediary between the Model and the View by handling user input, passing data to the Model, and sending data to the View.
• The MVC architecture helps to separate concerns, making the code more organized, easier to maintain, and testable.

Summary

The Model-View-Controller (MVC) architecture is a design pattern widely used in PHP web development to keep the code organized and maintainable. It separates an application into three interconnected components, Model, View, and Controller. The Model handles database-related operations, the View handles the presentation logic, and the Controller acts as an intermediary between the Model and the View. Separating the code into these three components makes it easier to maintain and test.