Save Metabox Data Looping Through an Array

Hi all,

I’ve a metabox for a specific custom post type (Stores), inside the metabox I create a variable amount of checkboxes based on a WP_Query. In other words I have many checkboxes as the children pages (Armani, Gucci, Versace, …) of a specific page (Brands).

function add_stores_metabox() {

    add_meta_box(
        'store-brands',
        'Store Brands',
        'display_brands_stores_metabox',
        'stores',
        'side',
        'high'
    );

}

function display_brands_stores_metabox() {

    $args = array(
        'post_type' => 'page',
        'post_parent' => 43
        );

    $brands_in_stores = new WP_Query($args);

    while ($brands_in_stores->have_posts()) : $brands_in_stores->the_post();

        global $post;

        wp_nonce_field( plugin_basename( __FILE__ ), 'brands_stores_nonce' );

        $title = get_the_title();
        $html = '<p>';
        $html .= '<input id="' . $post->post_name . '" type="checkbox" name="' . $post->post_name . '" value=""/>';
        $html .= '<label for="' . $post->post_name . '">' . $title . '</label>';
        $html .= '</p>';

        echo $html;

    endwhile; wp_reset_query();
}

Now the UI works fine, but I don’t know how to save these data looping through an array, because I’ve to find dynamically the name of the field to use the update_post_meta() in the saving function that will follow.

Someone could helps me?