helpers.php

<?php

namespace Blujay\Helpers;

/**
 * Cleanup header
 */
function cleanup_header()
{
    // Remove extraneous links and the WordPress version number
    remove_action('wp_head', 'feed_links_extra', 3);
    remove_action('wp_head', 'rsd_link');
    remove_action('wp_head', 'wlwmanifest_link');
    remove_action('wp_head', 'adjacent_posts_rel_link_wp_head', 10);
    remove_action('wp_head', 'wp_generator');
    remove_action('wp_head', 'wp_shortlink_wp_head', 10);

    // Remove the WordPress version from RSS feeds
    add_filter('the_generator', '__return_false');
}

// Disable REST API and oEmbed discovery links
function disable_rest_and_oembed()
{
    remove_action('wp_head', 'rest_output_link_wp_head', 10);
    remove_action('wp_head', 'wp_oembed_add_discovery_links');
    remove_action('wp_head', 'wp_oembed_add_host_js');
}

// Disable emoji inline styles and scripts
function disable_emoji()
{
    remove_action('wp_head', 'print_emoji_detection_script', 7);
    remove_action('admin_print_scripts', 'print_emoji_detection_script');
    remove_action('wp_print_styles', 'print_emoji_styles');
    remove_action('admin_print_styles', 'print_emoji_styles');
    remove_filter('the_content_feed', 'wp_staticize_emoji');
    remove_filter('comment_text_rss', 'wp_staticize_emoji');
    remove_filter('wp_mail', 'wp_staticize_emoji_for_email');
}

/**
 * Move scripts to footer
 */
function move_js_to_footer()
{
    remove_action('wp_head', 'wp_print_scripts');
    remove_action('wp_head', 'wp_print_head_scripts', 9);
    remove_action('wp_head', 'wp_enqueue_scripts', 1);
}

/**
 * Add page and post slugs to body class
 */
function add_classes_to_body($classes)
{
    global $post;

    // Add page and post slugs
    if (isset($post)) {
        $classes[] = $post->post_type . '-' . $post->post_name;
    }

    // Add "is-blog" class if blog related page
    if (((is_archive()) || (is_author()) || (is_category()) || (is_home()) || (is_single()) || (is_search()) || (is_tag())) == true) {
        $classes[] = "is-blog";
    }

    return $classes;
}

/**
 * Add custom image sizes to media library
 */
function add_custom_image_sizes_to_media_library($image_sizes)
{
    // Get the custom image sizes
    global $_wp_additional_image_sizes;

    // If there are none, just return the built-in sizes
    if (empty($_wp_additional_image_sizes)) {
        return $image_sizes;
    }

    // Add all the custom sizes to the built-in sizes
    foreach ($_wp_additional_image_sizes as $id => $data) {
        if (!isset($image_sizes[$id])) {
            $image_sizes[$id] = ucfirst(str_replace('-', ' ', $id));
        }
    }

    return $image_sizes;
}

/**
 * Enable shortcodes in Custom HTML widget
 */
function enable_shortcodes_in_html_widget()
{
    add_filter('widget_text', 'do_shortcode');
}
?>