What are some alternative methods to achieve the same functionality without relying on require_once for including boxes on a webpage?

When using require_once to include boxes on a webpage, it can lead to issues such as file path errors or duplicate inclusion. To achieve the same functionality without relying on require_once, you can use other methods like include, include_once, or require. These functions allow you to include files in PHP without worrying about duplicate inclusions or file path errors.

// Using include to include boxes on a webpage
include 'box1.php';
include 'box2.php';
include 'box3.php';