/**
 * Saves the user-selected post stylesheet on the 'save_post' hook.
 *
 * @since 0.2.0
 * @access public
 * @param int $post_id The ID of the current post being saved.
 * @param object $post The post object currently being saved.
 */
function post_stylesheets_meta_box_save($post_id, $post = '')
{
    /* Fix for attachment save issue in WordPress 3.5. @link http://core.trac.wordpress.org/ticket/21963 */
    if (!is_object($post)) {
        $post = get_post();
    }
    /* Verify the nonce before proceeding. */
    if (!isset($_POST['post-stylesheets-nonce']) || !wp_verify_nonce($_POST['post-stylesheets-nonce'], basename(__FILE__))) {
        return;
    }
    /* Check if the post type supports 'post-stylesheets'. */
    if (!post_type_supports($post->post_type, 'post-stylesheets')) {
        return;
    }
    /* Get the meta key. */
    $meta_key = post_stylesheets_get_meta_key();
    /* Get the previous post stylesheet. */
    $meta_value = get_post_stylesheet($post_id);
    /* Get the submitted post stylesheet. */
    $new_meta_value = $_POST['post-stylesheets'];
    /* If there is no new meta value but an old value exists, delete it. */
    if (current_user_can('delete_post_meta', $post_id, $meta_key) && '' == $new_meta_value && $meta_value) {
        delete_post_stylesheet($post_id);
    } elseif (current_user_can('add_post_meta', $post_id, $meta_key) && $new_meta_value && '' == $meta_value) {
        set_post_stylesheet($post_id, $new_meta_value);
    } elseif (current_user_can('edit_post_meta', $post_id, $meta_key) && $meta_value !== $new_meta_value) {
        set_post_stylesheet($post_id, $new_meta_value);
    }
}
/**
 * Saves the user-selected post stylesheet on the 'save_post' hook.
 *
 * @since 0.2.0
 * @access private
 * @param int $post_id The ID of the current post being saved.
 * @param object $post The post object currently being saved.
 */
function post_stylesheets_meta_box_save($post_id, $post)
{
    /* Verify the nonce before proceeding. */
    if (!isset($_POST['post-stylesheets-nonce']) || !wp_verify_nonce($_POST['post-stylesheets-nonce'], basename(__FILE__))) {
        return;
    }
    /* Check if the post type supports 'post-stylesheets'. */
    if (!post_type_supports($post->post_type, 'post-stylesheets')) {
        return;
    }
    /* Get the meta key. */
    $meta_key = post_stylesheets_get_meta_key();
    /* Get the previous post stylesheet. */
    $meta_value = get_post_stylesheet($post_id);
    /* Get the submitted post stylesheet. */
    $new_meta_value = $_POST['post-stylesheets'];
    /* If there is no new meta value but an old value exists, delete it. */
    if (current_user_can('delete_post_meta', $post_id, $meta_key) && '' == $new_meta_value && $meta_value) {
        delete_post_stylesheet($post_id);
    } elseif (current_user_can('add_post_meta', $post_id, $meta_key) && $new_meta_value && '' == $meta_value) {
        set_post_stylesheet($post_id, $new_meta_value);
    } elseif (current_user_can('edit_post_meta', $post_id, $meta_key) && $meta_value !== $new_meta_value) {
        set_post_stylesheet($post_id, $new_meta_value);
    }
}