如何在wordpress小部件中列出s3存储桶对象？

require_once get_template_directory() . '/aws-sdk-php/aws-autoloader.php';

class S3ObjectsWidget extends WP_Widget {
    public function __construct() {
        parent::__construct(
            's3_objects_widget',
            'S3 Objects Widget',
            array( 'description' => 'Displays a list of S3 bucket objects' )
        );
    }

    public function widget( $args, $instance ) {
        // 在这里编写代码来获取S3存储桶对象列表并显示在小部件中
    }

    public function form( $instance ) {
        // 在这里编写代码来显示小部件的设置表单
    }

    public function update( $new_instance, $old_instance ) {
        // 在这里编写代码来保存小部件的设置
    }
}

function register_s3_objects_widget() {
    register_widget( 'S3ObjectsWidget' );
}
add_action( 'widgets_init', 'register_s3_objects_widget' );

public function widget( $args, $instance ) {
    $s3 = new Aws\S3\S3Client( array(
        'version' => 'latest',
        'region' => 'your_s3_bucket_region',
        'credentials' => array(
            'key' => 'your_aws_access_key',
            'secret' => 'your_aws_secret_key',
        ),
    ) );

    $bucket = 'your_s3_bucket_name';
    $objects = $s3->listObjects( array( 'Bucket' => $bucket ) );

    // 在这里编写代码来显示S3存储桶对象列表
}

public function widget( $args, $instance ) {
    // ...

    echo $args['before_widget'];
    echo $args['before_title'] . 'S3 Objects' . $args['after_title'];

    if ( !empty( $objects['Contents'] ) ) {
        echo '<ul>';
        foreach ( $objects['Contents'] as $object ) {
            echo '<li><a href="' . $s3->getObjectUrl( $bucket, $object['Key'] ) . '">' . $object['Key'] . '</a></li>';
        }
        echo '</ul>';
    } else {
        echo 'No objects found in the bucket.';
    }

    echo $args['after_widget'];
}