WordPress ~ Clean head HTML tag - #frontend #optimisation

functions.php

<?php

/**
 * Define what to clean from the theme header frontend, via the "remove_action" hook.
 *
 * @see https://github.com/GetOlympus/Zeus-Core
 */

$optims = [
    'adjacent_posts_rel',       // Removes the next and previous post links from the header
    'feed_links',               // Removes Automatics RSS links, which will still work with your own links
    'shortlink',                // Removes the shortlink url from header
    'recent_comments',          // Removes a block of inline CSS used by old themes from the header
    'resource_hints',           // Removes dns-prefetch links from the header

    'index_rel_link',           // Removes rel navigation links
    'parent_post_rel_link',     // Removes rel parent link
    'rest_output_link_wp_head', // Removes REST API link tag
    'rsd_link',                 // Removes Really Simple Discovery (RSD) links used for automatic pingbacks
    'start_post_rel_link',      // Removes rel first post link
    'wc_generator_tag',         // Removes WooCommerce meta generator tag
    'wp_dlmp_l10n_style',       // Removes i18n styles
    'wp_generator',             // Removes WordPress meta generator tag
    'wlwmanifest_link',         // Removes the link to wlwmanifest.xml needed to support Windows Live Writer
];

// Iterate on all optimizations
foreach ($optims as $key) {
    if ('adjacent_posts_rel' === $key) {
        remove_action('wp_head', 'adjacent_posts_rel_link', 10, 0);
        remove_action('wp_head', 'adjacent_posts_rel_link_wp_head', 10, 0);
        continue;
    }

    if ('feed_links' === $key) {
        remove_theme_support('automatic-feed-links');
        remove_action('wp_head', 'feed_links', 2);
        remove_action('wp_head', 'feed_links_extra', 3);
        continue;
    }

    if (in_array($key, ['parent_post_rel_link', 'start_post_rel_link'])) {
        remove_action('wp_head', $key, 10, 0);
        continue;
    }

    if ('shortlink' === $key) {
        remove_action('wp_head', 'wp_shortlink_wp_head', 10, 0);
        remove_action('template_redirect', 'wp_shortlink_header', 11, 0);
        continue;
    }

    if ('recent_comments' === $key) {
        add_filter('show_recent_comments_widget_style', '__return_false');
        continue;
    }

    if ('resource_hints' === $key) {
        remove_action('wp_head', 'wp_resource_hints', 2);
        continue;
    }

    // Default action
    remove_action('wp_head', $key);
}