How does the order of class definitions and includes affect the functionality of xtemplate in PHP?

The order of class definitions and includes can affect the functionality of xtemplate in PHP because xtemplate relies on certain classes being defined before it can be properly used. To ensure proper functionality, make sure to include any necessary class files before defining the xtemplate class.

<?php

// Include necessary class files first
require_once 'class1.php';
require_once 'class2.php';

// Define the xtemplate class
class xtemplate {
    // xtemplate class implementation
}

// Rest of the PHP code using xtemplate