What are the considerations for using classes and CSS in PHP code to improve code readability and maintainability?

Using classes and CSS in PHP code can improve code readability and maintainability by separating the presentation logic from the business logic. This allows for easier maintenance and updates to the codebase, as changes to the styling can be made independently of the underlying functionality. Additionally, using classes and CSS promotes code reusability and modularity, making it easier to scale the application in the future.

<?php

class User {
    private $name;
    private $email;

    public function __construct($name, $email) {
        $this->name = $name;
        $this->email = $email;
    }

    public function displayUserInfo() {
        echo "<div class='user-info'>";
        echo "<p>Name: {$this->name}</p>";
        echo "<p>Email: {$this->email}</p>";
        echo "</div>";
    }
}

$user1 = new User("John Doe", "john.doe@example.com");
$user1->displayUserInfo();

?>