functions.php

<?php
/**
 * Nx Wordpress functions and definitions.
 *
 * @link https://developer.wordpress.org/themes/basics/theme-functions/
 *
 * @package WordPress
 * @subpackage Nx Wordpress
 * @since Nx Wordpress 0.1.0
 */

// Exit if accessed directly.
defined('ABSPATH') || exit;

// load composer dependencies.
require_once __DIR__ . '/vendor/autoload.php';

// Disable Gutenberg on the back end.
add_filter( 'use_block_editor_for_post', '__return_false' );

// Disable Gutenberg for widgets.
add_filter( 'use_widgets_block_editor', '__return_false' );

/** Scan Directory Function */
function nx_scandir($path) {

    /** Array Directory Files */
    $files = [];

    /** Scan Directory Folder */
    $scandir = array_diff(scandir($path), ['.', '..']);

    foreach ($scandir as $file):
        $dir = is_dir("{$path}{$file}") ? nx_scandir("{$path}{$file}/") : ["{$path}{$file}"];
        $files = [...$files, ...$dir];
    endforeach;

    return $files;
 }

// Custom additions.
foreach (nx_scandir(get_template_directory()."/inc/") as $file):
    require_once $file;
endforeach;

// Add style and script files
add_action('wp_enqueue_scripts', function () {

    // swiper style and script
    wp_enqueue_script('swiper', 'https://cdn.jsdelivr.net/npm/swiper@11/swiper-bundle.min.js', ver: '11.2.6');
    wp_enqueue_style('swiper', 'https://cdn.jsdelivr.net/npm/swiper@11/swiper-bundle.min.css', ver: '11.2.6');

    // theme style and script
    wp_enqueue_style('nx-wordpress', get_template_directory_uri() . '/dist/style.css', ['swiper'], filemtime(get_template_directory() . '/dist/style.css'), 'all');
    wp_enqueue_script('nx-wordpress', get_template_directory_uri() . '/dist/script.js', ['swiper'], filemtime(get_template_directory() . '/dist/script.js'), true);
});

// Enable menus setting
register_nav_menus([
    'primary-menu' => 'Primary Menu',
    'mobile-menu' => 'Mobile Menu',
]);

// Enable featured image
add_theme_support('post-thumbnails');

// Enable custom header logo
// add_theme_support('custom-header');

// Enable sidebar widget
// register_sidebar([
//     'name' => 'Sidebar Widget',
//     'id' => 'sidebar-widget'
// ]);

// Enable excerpt or short description
add_post_type_support('page', 'excerpt');

// Create custom post type
add_action("init", fn() => register_post_type(
    'news',
    [
        'label' => 'News',
        'labels' => [
            'name' => _x('News', 'post general name'),
            'singular_name' => _x('News', 'post singular name'),
            'search_items' => 'Search News',
            'all_items' => 'All News',
            'edit_item' => 'Edit News',
            'update_item' => 'Update News',
            'add_new_item' => 'Add News',
        ],
        'public' => true,
        // 'hierarchical' => true,                                               // it is use to convert page type
        'exclude_from_search' => true,
        'publicly_queryable' => true,
        'show_ui' => true,
        'rewrite' => ['with_front' => false],
        'menu_position' => 5,
        'menu_icon' => 'dashicons-media-document',
        'taxonomies' => ['post_tag', 'category'],
        'supports' => ['title', 'editor', 'thumbnail', 'excerpt', 'page-attributes'],
        'has_archive' => true,
    ])
);

// Create custom taxonomy type
add_action(
    "init",
    fn() => register_taxonomy(
        'author',
        'news',
        [
            'label' => 'Authors',
            'labels' => [
                'name' => _x('Authors', 'taxonomy general name'),
                'singular_name' => _x('Author', 'taxonomy singular name'),
                'search_items' => 'Search Author',
                'all_items' => 'All Authors',
                'parent_item' => 'Parent Author',
                'edit_item' => 'Edit Author',
                'update_item' => 'Update Author',
                'add_new_item' => 'Add New Author',
            ],
            'hierarchical' => true,                                               // it is use to convert categories type
            'rewrite' => ['with_front' => false],
            'has_archive' => true,
        ]
    )
);

// Create custom field
add_action('add_meta_boxes', fn() => add_meta_box('meta_header_script', 'Custom Header Script', 'Head_script', 'news'));

function Head_script($post) {
    $HeadScript = get_post_meta($post->ID, 'HeadScript', true);
    echo '<textarea name="header_script" style="width:100%; height:125px;">' . $HeadScript . '</textarea>';
};

add_action('save_post', function ($post_ID) {
    if (isset($_POST['header_script'])) {
        update_post_meta($post_ID, 'HeadScript', esc_html($_POST['header_script']));
    }
});

// apply filter for title
add_filter('the_title', fn($content) => ucwords($content));

// add custom title
add_filter('wp_title', fn($title) => $title ? "{$title} | " . get_bloginfo() : get_bloginfo('description'));

// Form Submit Button
add_action('wp_footer', function () {
    echo "
    <script type='text/javascript'>
        const gf_submit = () => document.querySelector('.gform_footer input[type=submit]')?.click();
    </script>";
});