What are the best practices for separating design and code in PHP programming?

When separating design and code in PHP programming, it is best to follow the MVC (Model-View-Controller) design pattern. This helps to keep the presentation logic (View) separate from the business logic (Model) and the control flow (Controller). By organizing your code in this way, it becomes easier to maintain, test, and scale your application. 

// Example of MVC structure in PHP

// Model
class User {
    public function getUserById($id) {
        // Database query to fetch user data
    }
}

// View
class UserView {
    public function displayUserInfo($user) {
        echo "Name: " . $user['name'] . "<br>";
        echo "Email: " . $user['email'] . "<br>";
    }
}

// Controller
class UserController {
    public function getUserInfo($id) {
        $userModel = new User();
        $user = $userModel->getUserById($id);

        $userView = new UserView();
        $userView->displayUserInfo($user);
    }
}

// Implementation
$userId = 1;
$userController = new UserController();
$userController->getUserInfo($userId);

Keywords

MVC separation of concerns template engines OOP namespaces

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