如果当前 post 中的附件图像数量多于 "X"，如何仅显示来自 post（在分类页面上）的 "X" 图像？

Question

我有一个多站点网络，用户上传 posts，当用户将超过 10 张图像附加到 post 时，这太可怕了，因为这会很长，并且延伸到4.-5。砌体布局上的页面...所以我想要，如果 post 有超过 3 个附件（图像），在我的网络主页（和分类页面）上 post 只显示第一个3张图片，一张link到完整的post。所以我有这个代码：

   $attachments = get_children(
       array(
    'post_type' => 'attachment',
    'post_mime_type' => 'image',
    'post_parent' => $post->ID
       ));
   if(count($attachments) > 3) { ?>
       <!-- Code need to here, what shows only the first 3 images -->
   <?php } else {
       the_content();
         } ?>

我正在网上寻找解决方案，但目前我没有找到任何东西。如果你能帮助我，请写信。

Answer 1

这适用于基于子域的多站点，具有重新记录（广播或任何）子帖子，没有原始内容（因为它是从它们的父级获取的）。

添加到您的 function.php:

  // ADD IMAGES TO the_expert
  function improved_trim_excerpt($text) {
     global $post;
     if ( '' == $text ) {
             $text = get_the_content('');
             $text = apply_filters('the_content', $text);
             $text = strip_tags($text, '<a><img>');

            $delim = '</a>'; // I think you also want add links to your images
            $start = 0; // starter image
            $items = 3; // number of images
            $the_excerpt = implode($delim, array_slice(explode($delim, $text), $start,$items)) . $delim; // $delim closes your excerpt
     }
     return $the_excerpt;
  }
  remove_filter('get_the_excerpt', 'wp_trim_excerpt');
  add_filter('get_the_excerpt', 'improved_trim_excerpt');

以及您的内容页面部分：

  global $post;
  $postid = ($id == $post->ID) ? $post->ID : $id;
  $content = $post->post_content;
  // match all urls
  preg_match_all( '/(http:|https:)?\/\/([\w_-]+(?:(?:\.[\w_-]+)+))([\w.,@?^=%&:\/~+#-]*[\w@?^=%&\/~+#-])?/', $content, $matches );
  $count = 0;
  if ( ! empty( $matches ) && ! empty( $matches[ 0 ] ) ) {
      foreach ( $matches[ 0 ] as $url ) {
          $split    = explode( '#', $url );
          $split    = explode( '?', $split[ 0 ] );
          $split    = explode( '&', $split[ 0 ] );
          $filename = basename( $split[ 0 ] );
          $file_type = wp_check_filetype( $filename, wp_get_mime_types() );
          if ( ! empty ( $file_type[ 'ext' ] ) ) {
              // (optional) limit inclusion based on file type
              if( ! in_array( $file_type[ 'ext' ], array('jpg', 'png', 'gif', 'webp', 'bmp')) ) continue;
              $files[ $url ] = $file_type;
              $urls[]=$url;
              $count ++;
          }
      }
  }
  $no_of_photos = $count / 2; // Gets the number of photo's attached in $no_of_photos variable -> you need use / 2, if your image's links shows to the file, because in this case, in every <img> have two 'ext'.
  $limit_photos = 3; // set your limit

              if( $no_of_photos <= $limit_photos ) {
              the_content(); ?>
              } else {
              the_excerpt(); ?>
              }

特别感谢@Andreas：

还有@jgraup： https://wordpress.stackexchange.com/a/246063/134567

如果当前 post 中的附件图像数量多于 "X"，如何仅显示来自 post（在分类页面上）的 "X" 图像？

How to shows only "X" images from a post (on a taxonomy page), if the number of the attachment images in the current post more than like "X"?

image

attachment