What is the importance of the order of execution in PHP functions and includes?

The order of execution in PHP functions and includes is important because it determines when and how certain code blocks are executed. For example, if a function is called before it is defined, PHP will throw an error. To solve this issue, make sure to define functions before calling them and include files at the beginning of the script to ensure that all necessary code is available when needed.

<?php
// Include necessary files at the beginning of the script
include 'functions.php';

// Define functions before calling them
function myFunction() {
    // Function code here
}

// Call the function after it has been defined
myFunction();
?>