Disable WordPress Search

<?php
// Prevent search queries
add_action('parse_query', function ($query, $error = true) {
    if (is_search() && !is_admin()) {
        $query->is_search       = false;
        $query->query_vars['s'] = false;
        $query->query['s']      = false;

        if ($error === true) {
            $query->is_404 = true;
        }
    }
}, 15, 2);

// Remove the Search Widget
add_action('widgets_init', function () {
    unregister_widget('WP_Widget_Search');
});

// Remove the search form
add_filter('get_search_form', '__return_empty_string', 999);

// Remove the core search block
add_action('init', function () {
    if (
        !function_exists('unregister_block_type') ||
        !class_exists('WP_Block_Type_Registry')
    ) {
        return;
    }

    $block = 'core/search';

    if (WP_Block_Type_Registry::get_instance()->is_registered($block)) {
        unregister_block_type($block);
    }
});

// Remove admin bar search
add_action('admin_bar_menu', function ($wp_admin_bar) {
    $wp_admin_bar->remove_menu('search');
}, 11);