- $body = str_replace($attachment['preview'], Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE), $body);
+ $proxy = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
+ $search = ['[img=' . $attachment['preview'] . ']', ']' . $attachment['preview'] . '[/img]'];
+ $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
+
+ $body = str_replace($search, $replace, $body);