WordPress - functions.php causing WordPress error - php

Question

I have the following folder structure for my theme:
theme
inc
theme
functions.php
init.php
functions.php
In inc/theme/functions.php, I'm placing all theme specific functions (i.e. removing taxonomies etc). In theme/functions.php, I have all my core functions.
With my current code, WordPress states "The site is experiencing technical difficulties.". If I delete everything in theme/functions.php, the content loads, but the code in inc/theme/functions.php is not being executed. For example, in inc/theme/functions.php, I have wp_enqueue_style( 'style', get_stylesheet_uri() ); and none of the styles are pulling through.
Can't seem to figure out:
Why theme/functions.php is causing a WordPress error.
Why inc/theme/functions.php is not being executed.
theme/functions.php
<?php
require_once trailingslashit( get_template_directory() ) . 'inc/init.php';
new theme_ThemeFunctions;
class theme_ThemeFunctions {
function __construct() {
load_theme_textdomain( 'theme' );
add_action( 'init', array( $this, 'post_types_taxonomies' ) );
add_action( 'init', array( $this, 'register_menus' ) );
}
public function post_types_taxonomies() {
register_post_type(
'case-studies',
build_post_args(
'case-study', 'Case study', 'Case studies',
array(
'menu_icon' => 'dashicons-book',
'menu_position' => 20,
'has_archive' => true
)
)
);
}
public function register_menus() {
register_nav_menus(
array(
'main' => __( 'Main Menu', 'theme' ),
)
);
}
}
?>
inc/theme/functions.php
<?php
function scriptAndStyles() {
wp_enqueue_style( 'style', get_stylesheet_uri() );
}
add_action( 'wp_enqueue_scripts', 'scriptAndStyles' );
function remove_editor() {
remove_post_type_support('page', 'editor');
}
add_action('admin_init', 'remove_editor');
// Remove featured image option from pages
function remove_thumbnail_box() {
remove_meta_box( 'postimagediv','page', 'side' );
}
add_action('do_meta_boxes', 'remove_thumbnail_box');
// Remove posts type option
function post_remove () {
remove_menu_page('edit.php');
}
add_action('admin_menu', 'post_remove');
?>
inc/init.php
<?php
$include_dir = trailingslashit( get_template_directory() ) . 'inc/';
// Load any custom functions
require_once $include_dir . 'theme/functions.php';
?>

Answer 1

You need use get_template_directory() for require your files.
And use new theme_ThemeFunctions below class itself.
Also use to view errors:
define('WP_DEBUG', 1);
define('WP_DEBUG_DISPLAY', 1);