Default featured image

外掛說明

Add a default featured image to the media settings page. This featured image will show up if no featured image is set. Simple as that.

For exceptions and to see which functions to use see the FAQ.

Suggestions are welcome

  • Found a bug?
  • Want to help to translate it in your language?
  • Something to be improved?

Contact me

螢幕擷圖

  • The setting on the media page
  • The media manager will start with the current selected image

安裝方式

  1. Unzip the folder to the /wp-content/plugins/ directory
  2. Activate the plugin through the ‘Plugins’ menu in WordPress
  3. Go to the settings->media page and select an image.

常見問題集

My chosen featured image doesn’t show, why isn’t it working?

This plugin can’t guarantee that it works. That depends on the themes. Still I want to know if it fails, so contact me

Which functions can I use to display the featured image?

The plugin uses the default WordPress functions the_post_thumbnail or get_the_post_thumbnail. has_post_thumbnail will always return true. get_post_thumbnail_id will return the ID set on the post or the DFI you set.

Can I exclude a page or give it a different image?

Yes you can by using the builtin dfi_thumbnail_id filter. It will give you the post id which you can use to check against.

Don’t use a featured image on page 23

function dfi_skip_page ( $dfi_id, $post_id ) {
  if ( $post_id == 23 ) {
    return 0; // invalid id
  }
  return $dfi_id; // the original featured image id
}
add_filter( 'dfi_thumbnail_id', 'dfi_skip_page', 10 , 2 );

Use a different image for some categories

The example below only works if the post has ‘animals’ as a category. Assigning just ‘cats’ won’t work
To do that just don’t nest the if

function dfi_category ( $dfi_id, $post_id ) {
  // all which have 'animals' as a category
  if ( has_category( 'animals', $post_id ) ) {

    //sub category
    if ( has_category( 'cats', $post_id ) ) {
      return 7; // cats img
    } else if has_category( 'dogs', $post_id ) {
      return 8; // dogs img
    }

    return 6; // default animals picture
  }
  return $dfi_id; // the original featured image id
}
add_filter( 'dfi_thumbnail_id', 'dfi_category', 10, 2 );

Different image for the post_type ‘wiki’

function dfi_posttype_book ( $dfi_id, $post_id ) {
  $post = get_post($post_id);
  if ( 'wiki' === $post->post_type ) {
    return 31; // the image id
  }
  return $dfi_id; // the original featured image id
}
add_filter( 'dfi_thumbnail_id', 'dfi_posttype_book', 10, 2 );

Can I change the HTML of the image returned?

yes you can with the filter dfi_thumbnail_html.

function dfi_add_class($html, $post_id, $default_thumbnail_id, $size, $attr) {
    // add a class to the existing class list
    $attr['class'] .= ' my-class';

    return wp_get_attachment_image( $default_thumbnail_id, $size, false, $attr );
}
add_filter( 'dfi_thumbnail_html', 'dfi_add_class', 10, 5 );

使用者評論

2021 年 8 月 6 日
This plugin does its job as promised. Very quick and friendly support. If you need a default featured image - just use this plugin 🙂
2021 年 3 月 23 日
Your solution helped us a lot especially in the beginning, when customer didn't had pretty much any images on the site. Thank you for taking a time with our cron-related problem!
2020 年 11 月 3 日
Blog posts without a featured image could ruin a nice blog grid design with "ghost images". This is a perfect way to add a fallback version. A few plugin settings/options (different featured images for different post types and/or taxonomies, for example) would be nice. Maybe in a future pro version? But it can still be done with a few lines of code. Extra plus for quick and nice support.
閱讀全部 49 則使用者評論

參與者及開發者

以下人員參與了開源軟體〈Default featured image〉的開發相關工作。

參與者

Default featured image 外掛目前已有 9 個本地化語言版本。 感謝全部譯者為這個外掛做出的貢獻。

將 Default featured image 外掛本地化為台灣繁體中文版

對開發相關資訊感興趣?

任何人均可瀏覽程式碼、查看 SVN 存放庫,或透過 RSS 訂閱開發記錄

變更記錄

1.7.1

  • Fixed weird SVN deployment bug.

1.7.0

  • moved main class to it’s own file.
  • Added second class that can hold exceptions with other plugins
  • The first exception is for WP User Frontend
  • The second exception is for WP All Import.

1.6.4

  • get_post_meta($post_id) without specifying the meta_key didn’t find the DFI. It will now even use an even deeper level and set it in the core cache.

1.6.3

  • Fixed plugin header which blocked installing it.

1.6.2

  • Plugin now follows WP coding standard
  • Fixed a small bug where DFI overrides attachments featured images. mp3 has a music note by default, DFI should not override that.

1.6.1

  • Small readme.txt update.

1.6

  • On of the last fixes didn’t account for all situations.

1.5

  • Fixed two small (and rare) warnings
  • Added translation domain

1.4

  • Added plugin images both the plugin header as the thumbnail. Based on the boat WP.org uses in it’s theme previews
  • Fixed a bug where the ajax calls didn’t return the DFI forum thread

1.3

  • Filter dfi_thumbnail_id now also returns the post ID of the post (or any postype) that is being called. See the FAQ for new examples

1.2

  • Filter dfi_thumbnail_id is now called in an earlier stage.

1.1

  • Fixed inheriting classes of the image

1.0

  • Plugin will now remove it’s setting on plugin removal
  • added a default class to the <img> tag, if it shows a default featured image
  • The default featured image will now also return with get_post_thumbnail_id, making the chance that it fail far far smaller.
  • The image given in the media page is now validated

0.9

  • Launch