What are the potential differences in behavior between Apache 2 and Abyss Web Server X1 when running PHP scripts?

The potential differences in behavior between Apache 2 and Abyss Web Server X1 when running PHP scripts may include differences in configuration settings, server-side scripting support, and performance. To ensure compatibility and consistent behavior across both servers, it is recommended to use server-agnostic PHP code that adheres to PHP standards and best practices.

<?php
// Server-agnostic PHP code
// This code snippet is compatible with both Apache 2 and Abyss Web Server X1

// Your PHP script code here

?>