What are the advantages and disadvantages of using the method of including a file in every PHP file on the web server compared to other approaches for code reuse and organization?

When including a file in every PHP file on the web server, it can provide a centralized location for reusable code and improve organization. However, this approach can also lead to code duplication, increased server load, and potential security vulnerabilities if not implemented carefully.

// Include a common file in every PHP file on the web server
include_once 'common.php';