您可以使用add_shortcode 函数为您的站点注册自定义快捷码。比如像这样，

// add to (child) theme\'s functions.php
function my_download_featured_image_link( $atts, $content = \'\' ) {
  // shortcode should return its output
  return sprintf(
    \'<a class="download_image" href="%s">%s</a>\', // html output of the shortcode
    esc_url( get_the_post_thumbnail_url(null, \'full\') ), // defaults to current global $post
    esc_html__( \'Download featured image\', \'textdomain\' ) // translatable anchor text
  );
}
add_shortcode( \'my_download_featured_image\', \'my_download_featured_image_link\' );

或者，您可以使用the_content 筛选以在帖子内容末尾自动添加下载链接。链接输出可能需要一些调整，才能与您正在使用的页面生成器很好地配合使用。

// add to (child) theme\'s functions.php
function my_download_featured_image_link_after_content( $content ) {
  if ( is_singe() || has_post_thumbnail() ) {
    return $content . sprintf(
      \'<a class="download_image" href="%s">%s</a>\',
      esc_url( get_the_post_thumbnail_url(null, \'full\') ), 
      esc_html__( \'Download featured image\', \'textdomain\' )
    );
  } else {
    return $content;   
  }
}
add_filter( \'the_content\', \'my_download_featured_image_link_after_content\' );