我正在使用original post by birgire, 但我不知道使用wp\\u get\\u sidebars\\u widgets（）是否“可以”；以这种方式。

function wpse_show_widget_alt( $index, $id ) {
global $wp_registered_widgets, $wp_registered_sidebars;
    $did_one = FALSE;

    //This built-in func isn\'t meant for theme or plugin development. 
    //I don\'t know any other way to list widgets in an array sorted by sidebar.
$theWidgets = wp_get_sidebars_widgets();
$widgetNumber = $theWidgets[$index][$id];

// Check if $id is a registered widget
if( ! isset( $wp_registered_widgets[$widgetNumber] ) 
    || ! isset( $wp_registered_widgets[$widgetNumber][\'params\'][0] ) ) 
{
    return FALSE;
}

// Check if $index is a registered sidebar
$sidebars_widgets = wp_get_sidebars_widgets();
if ( empty( $wp_registered_sidebars[ $index ] ) 
    || empty( $sidebars_widgets[ $index ] ) 
    || ! is_array( $sidebars_widgets[ $index ] ) )
{
    return FALSE;
}

// Construct $params
$sidebar = $wp_registered_sidebars[$index];
$params = array_merge(
                //array( array_merge( $sidebar, array(\'widget_id\' => $id, \'widget_name\' => $wp_registered_widgets[$id][\'name\']) ) ),
                array( array_merge( $sidebar, array(\'widget_id\' => $widgetNumber, \'widget_name\' => $wp_registered_widgets[$widgetNumber][\'name\']) ) ),
                (array) $wp_registered_widgets[$widgetNumber][\'params\']
          );

// Substitute HTML id and class attributes into before_widget
$classname_ = \'\';
foreach ( (array) $wp_registered_widgets[$widgetNumber][\'classname\'] as $cn )
{
    if ( is_string($cn) )
        $classname_ .= \'_\' . $cn;
    elseif ( is_object($cn) )
        $classname_ .= \'_\' . get_class($cn);
}
$classname_ = ltrim($classname_, \'_\');
$params[0][\'before_widget\'] = sprintf($params[0][\'before_widget\'], $widgetNumber, $classname_);         
$params = apply_filters( \'dynamic_sidebar_params\', $params );

// Run the callback
$callback = $wp_registered_widgets[$widgetNumber][\'callback\'];            
if ( is_callable( $callback ) )
{
     call_user_func_array( $callback, $params );
     $did_one = TRUE;
}
return $did_one;}