Disable comments site-wide

<?php
/**
 * Disable Comments Site-Wide
 *
 * Completely removes the commenting system from WordPress — closes existing
 * comments, removes the admin menu, hides the dashboard widget, strips the
 * admin bar link, and disables comment support on all post types. Useful for
 * business sites, portfolios, and landing pages where comments are noise.
 *
 * Usage: Add to functions.php.
 *
 * @category wordpress
 * @language php

 *
 * @author Adame Dahmani https://adame.io
 * @support Support my family project: https://adame.io/fundraiser
 */
add_action( 'admin_init', function () {
    $post_types = get_post_types();
    foreach ( $post_types as $post_type ) {
        if ( post_type_supports( $post_type, 'comments' ) ) {
            remove_post_type_support( $post_type, 'comments' );
            remove_post_type_support( $post_type, 'trackbacks' );
        }
    }
} );

add_filter( 'comments_open', '__return_false', 20, 2 );
add_filter( 'pings_open', '__return_false', 20, 2 );
add_filter( 'comments_array', '__return_empty_array', 10, 2 );

add_action( 'admin_menu', function () {
    remove_menu_page( 'edit-comments.php' );
} );

add_action( 'admin_init', function () {
    remove_meta_box( 'dashboard_recent_comments', 'dashboard', 'normal' );
} );

add_action( 'wp_before_admin_bar_render', function () {
    global $wp_admin_bar;
    $wp_admin_bar->remove_menu( 'comments' );
} );