从Wordpress中删除所有空图像链接

Question

我已从上传文件夹（2017）中删除了所有图片，现在我在主页和文章页面上获取了2017年所有帖子（已删除图片）的图像链接。那么如何从前端删除所有损坏的图像帧？

任何想法？

Answer 1

在functions.php中添加以下代码

代码经过测试且运行正常。

function get_post_images_from_body(){
  // get all post from post type.
  $posts = get_posts( array( 'post_type' => 'post') );

  $post_images = array();

  foreach($posts as $post){

    $szSearchPattern = '~<img [^\>]*\ />~';

    preg_match_all( $szSearchPattern, $post->post_content, $images );

    $iNumberOfPics = count($images[0]);

    if ( $iNumberOfPics > 0 ) {

      for ( $i=0; $i < $iNumberOfPics ; $i++ ) {
          $post_images[$post->ID] = $images[0];
     };

    }

  }

  return $post_images;

}

function attachment_id($image_url) {
  global $wpdb;

  $attachment_id = $wpdb->get_var( $wpdb->prepare( "SELECT wposts.ID FROM $wpdb->posts wposts, $wpdb->postmeta wpostmeta WHERE wposts.ID = wpostmeta.post_id AND wpostmeta.meta_key = '_wp_attached_file' AND wpostmeta.meta_value = '%s' AND wposts.post_type = 'attachment'", $image_url ) );

  return $attachment_id;
}

function update_post_content($id,$content){
  $my_post = array(
      'ID'           => $id,
      'post_content' => $content,
  );
// Update the post into the database
  wp_update_post( $my_post );
}


$post_images = get_post_images_from_body();
foreach($post_images as $key => $value){
  preg_match('/<img(.*)src(.*)=(.*)"(.*)"/U', $value[0], $result);
  $image_src = array_pop($result);
  $file_path = $image_src;
  $file_name = basename($image_src);

  $post = get_post($key);
  $content = preg_replace("/<img[^>]+\>/i", " ", $post->post_content);
  update_post_content($key,$content);

  //if you want to delete attachment id which is associated with post, comment out the following code.
  //
  // $id = attachment_id($file_path);
  // if(!empty($id)){
  //   wp_delete_attachment( $id );
  // }

}