当您将其定义为函数时，可以在侧栏中添加类前和类后。php。

<?php $args = array(
    \'name\'          => __( \'Sidebar name\', \'theme_text_domain\' ),
    \'id\'            => \'unique-sidebar-id\',
    \'description\'   => \'\',
        \'class\'         => \'\',
    \'before_widget\' => \'<li id="%1$s" class="widget %2$s">\', //You can change class/id here
    \'after_widget\'  => \'</li>\',
    \'before_title\'  => \'<h2 class="widgettitle">\',
    \'after_title\'   => \'</h2>\' ); ?>