step 1 + step 2

// CANCELLA PREZZI 2- STEP 1

function reset_price_fields( $hook ) {
    if ( 'edit.php' != $hook ) {
        return;
    }
  wp_enqueue_script( 'ajax-script', get_template_directory_uri . '/js/cancella_prezzi_2.js/', array('jquery'), '1.0' );
 $title_nonce = wp_create_nonce( 'title_example' );
wp_localize_script(
    'ajax-script',
    'my_ajax_obj',
    array(
        'ajax_url' => admin_url( 'admin-ajax.php' ),
        'nonce'    => $title_nonce,
    )
);


}

// CANCELLA PREZZI 2- STEP 2

add_action('wp_ajax_reset_price_fields', 'reset_price_fields2');

check_ajax_referer( 'title_example' );

function reset_price_fields2() {
    // Check for the required parameter
    if (!isset($_POST['author_id'])) {
        wp_send_json_error(['message' => 'No author ID provided.']);
        exit;
    }

    $author_id = intval($_POST['author_id']);
    $args = [
        'post_type' => 'post', // Change this to your custom post type
        'author' => $author_id,
        'posts_per_page' => -1 // Get all posts
    ];

    $query = new WP_Query($args);

    if ($query->have_posts()) {
        while ($query->have_posts()) {
            $query->the_post();
            $post_id = get_the_ID();

            // Get current custom fields
            $custom_fields = get_post_meta($post_id);

            // Prepare an array of custom fields to reset
            $fields_to_reset = ['1_per_hol', '2_periodo']; // Replace with your custom field keys

            foreach ($fields_to_reset as $field) {
                if (array_key_exists($field, $custom_fields)) {
                    // Delete the specific custom field
                    delete_post_meta($post_id, $field);
                }
            }
        }
        wp_send_json_success(['message' => 'Prices have been reset successfully.']);
    } else {
        wp_send_json_error(['message' => 'No posts found for this author.']);
    }

    wp_reset_postdata();
    exit;
}