我试图在WordPress codex的帮助下编写一些代码片段。请检查以下内容，并根据您的需要进一步更新。我希望这有助于：

global $post;

$args = array(
    \'numberposts\' => 1,
    \'order\' => \'ASC\',
    \'post_mime_type\' => \'image\',
    \'post_parent\' => $post->ID,
    \'post_status\' => null,
    \'post_type\' => \'attachment\',
);

$attachments = get_children( $args );

if ( $attachments ) {
   foreach ( $attachments as $attachment ) {
      $image_attributes = wp_get_attachment_image_src( $attachment->ID, \'full\' );
      echo wp_get_attachment_url($attachment->ID);
      echo \'<img src="\' . wp_get_attachment_thumb_url( $attachment->ID ) . \'" class="current">\';
}
}