About Better REST API Featured Images

Description

Note: You probably do not need this plugin. The REST API already supports adding the query param ?_embed to your URL and the response will then include all “embedded media”, including the featured image, and the data you get there is exactly what this plugin gives you. The only reasons to use this plugin at this point are if you....

Note: You probably do not need this plugin. The REST API already supports adding the query param ?_embed to your URL and the response will then include all “embedded media”, including the featured image, and the data you get there is exactly what this plugin gives you. The only reasons to use this plugin at this point are if you prefer to have the featured image data in a top level field in the response rather than among other embedded media in the _embedded field, and if you always want the featured image data in the response rather than having to ask for it with ?_embed. I still use this plugin because I do usually want both these things, but definitely give ?_embed a try before using this plugin. ?

Version 2 of the WordPress REST API returns a featured_media field (formerly featured_image) on the post object by default, but this field is simply the image ID.

This plugin adds a better_featured_image field to the post object that contains the available image sizes and urls, allowing you to get this information without making a second request.

It takes this:

"featured_media": 13,

And turns it into this:

"featured_media": 13,
"better_featured_image": {
    "id": 13,
    "alt_text": "Hot Air Balloons",
    "caption": "The event featured hot air balloon rides",
    "description": "The hot air balloons from the big event",
    "media_type": "image",
    "media_details": {
      "width": 5760,
      "height": 3840,
      "file": "2015/09/balloons.jpg",
      "sizes": {
        "thumbnail": {
          "file": "balloons-150x150.jpg",
          "width": 150,
          "height": 150,
          "mime-type": "image/jpeg",
          "source_url": "http://api.example.com/wp-content/uploads/2015/09/balloons-150x150.jpg"
        },
        "medium": {
          "file": "balloons-300x200.jpg",
          "width": 300,
          "height": 200,
          "mime-type": "image/jpeg",
          "source_url": "http://api.example.com/wp-content/uploads/2015/09/balloons-300x200.jpg"
        },
        "large": {
          "file": "balloons-1024x683.jpg",
          "width": 1024,
          "height": 683,
          "mime-type": "image/jpeg",
          "source_url": "http://api.example.com/wp-content/uploads/2015/09/balloons-1024x683.jpg"
        },
        "post-thumbnail": {
          "file": "balloons-825x510.jpg",
          "width": 825,
          "height": 510,
          "mime-type": "image/jpeg",
          "source_url": "http://api.example.com/wp-content/uploads/2015/09/balloons-825x510.jpg"
        }
      },
      "image_meta": {
        "aperture": 6.3,
        "credit": "",
        "camera": "Canon EOS 5D Mark III",
        "caption": "",
        "created_timestamp": 1433110262,
        "copyright": "",
        "focal_length": "50",
        "iso": "100",
        "shutter_speed": "0.004",
        "title": "",
        "orientation": 1
      }
    },
    "post": null,
    "source_url": "http://api.example.com/wp-content/uploads/2015/09/balloons.jpg"
},

The format of the response is nearly identical to what you would get sending a request to /wp-json/wp/v2/media/13 or using ?_embed. When no featured image has been set on the post the better_featured_image field will have a value of null.

I’ve done some basic performance tests that indicate the difference in response times with and without this plugin to be about 10-15ms for a collection of 10 posts and 0-5ms for a single post. For me this is much faster than making a second request to /media/, especially for multiple posts.

As of version 1.1.0, there is a filter better_rest_api_featured_image that allows you to add custom data to the better_featured_image field. The filter is directly on the return value of the function that returns the better_featured_image field. This can be used to do things like add custom image meta or an SVG version of the image to the response. Here’s an example of how you might use it:

add_filter( 'better_rest_api_featured_image', 'xxx_modify_rest_api_featured_image', 10, 2 );
/**
 * Modify the Better REST API Featured Image response.
 *
 * @param   array  $featured_image  The array of image data.
 * @param   int    $image_id        The image ID.
 *
 * @return  array                   The modified image data.
 */
function xxx_modify_rest_api_featured_image( $featured_image, $image_id ) {

  // Add an extra_data_string field with a string value.
  $featured_image['extra_data_string'] = 'A custom value.';

  // Add an extra_data_array field with an array value.
  $featured_image['extra_data_array'] = array(
    'custom_key' => 'A custom value.',
  );

  return $featured_image;
}

This plugin is on on Github and pull requests are always welcome. ?

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Performance

Memory Usage

Average memory usage is-7.26 KB
This is less than99%plugins

Page Speed

Average page loading time is increased by 0.02 s
This is faster than99%plugins

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After plugin activation

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Change

Average Change

- 0.02s

/(front page)

- 0.03s

/wp-admin/edit-comments.php

+ 0.02s

/wp-admin/edit-tags.php?taxonomy=category

- 0.02s

/wp-admin/edit.php

+ 0.08s

/wp-admin/index.php

- 0.07s

/wp-admin/media-new.php

+ 0.01s

/wp-admin/options-discussion.php

- 0.01s

/wp-admin/options-writing.php

- 0.01s

/wp-admin/post-new.php

- 0.09s

/wp-admin/post-new.php?post_type=page

+ 0.03s

/wp-admin/upload.php

- 0.1s

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Before plugin activation
After plugin activation

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Change

Average Change

- 7.26KB

/ (front page)

- 8.32KB

/wp-admin/edit-comments.php

+ 0.64KB

/wp-admin/edit-tags.php?taxonomy=category

+ 0.77KB

/wp-admin/edit.php

+ 0.78KB

/wp-admin/index.php

+ 0.78KB

/wp-admin/media-new.php

+ 0.66KB

/wp-admin/options-discussion.php

+ 0.7KB

/wp-admin/options-writing.php

- 11.04KB

/wp-admin/post-new.php

+ 2.62KB

/wp-admin/post-new.php?post_type=page

+ 1.77KB

/wp-admin/upload.php

+ 0.64KB

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Better REST API Featured ImagesbyBraad Martin

Version : 1.2.1

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About Better REST API Featured Images

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WP 5.3

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