register_sidebar(array(  
    'name' => 'Footer #2',  
    'id'   => 'footer2',  
    'description'   => 'Footer widget 2',  
    'before_widget' => '<aside role="complementary" id="%1$s" class="widget-content footer-widget" aria-label="[title]">',  
    'after_widget'  => '</aside>',  
    'before_title'  => '<h2 class="widget-title footer-widget-title">',  
    'after_title'   => '</h2>' ,
));

    function stp_accessibility_widget_func($params) {
    $name = isset($params[0]['widget_name']) ? $params[0]['widget_name'] : "";
    $params[0]['before_widget'] = str_replace('[title]', esc_attr($name), $params[0]['before_widget'] );
    return $params;
}
add_filter('dynamic_sidebar_params', 'stp_accessibility_widget_func');

使用此解决方案，它将在所有小部件中添加aria-label

Use this solution it will add aria-label in all the widgets