Custom File loader from Array of files with target Dir

autoload_funtion_files.php

<?php 
/*
    Project: Autoload function files 
    Author: Gkiokan Sali 
    Date: 25.08.2017
    Comment: Allows you to include_once files from array only.
*/

// Declare the function itself when it is not defined anywhere else 
if(!is_callable('autoload_function_files')):
function autoload_function_files($files=[], $folder=''){
    $base_path = __DIR__ . '/' . $folder . '/%s.php';

    if(is_array($files))
    foreach($files as $file):
        $path = sprintf($base_path, $file);

        if(file_exists($path))
        include_once $path;

    endforeach;
}
endif;

$basic_files = [
    'basics',
    'remove-comments',
    'theme-support',
    'theme-setup',
    'vc-container-extension',
    'enqueue',
    'navigation-extension',
    'onepage-render',
    'optimize',
];

$navigation_files = [
    'Menus',
    // 'ExtendsBodymovinIconFields',
    // 'ExtendsBodymovinIconWalker',
    // 'ExtendsInContactButtonWalker',
    // 'SubMenuWalker',
];

$vc_addon_files = [
    'buttons',
    'extensions',
    'footer_navigation',
];


// Load them all 
autoload_function_files($basic_files, 'basic');
autoload_function_files($navigation_files, 'navigation');
autoload_function_files($vc_addon_files, 'vc_addition');