Extension for 68publishers/file-storage that can generate images on-the-fly and more!

v0.5.4 2021-10-11 19:49 UTC


🌆 Extension for 68publishers/file-storage that can generate images on-the-fly and more!

Based on thephpleague/flysystem and intervention/image.


The best way to install 68publishers/image-storage is using Composer:

composer require 68publishers/image-storage

Integration into Nette Framework

Firstly, please read a documentation of 68publishers/file-storage.

File storage configuration example

Each image-storage is based on file-storage. so firstly we need to register our storage under file-storage extension. Here is an example configuration:

                base_path: /images
                signature_key: my-arbitrary-private-key
                allowed_pixel_density: [ 1, 2, 3 ]
                allowed_resolutions: [ 50x50, 200x200, 300x300, 200x, x200 ]
                allowed_qualities: [ 50, 80, 100 ]
                encode_quality: 90
                cache_max_age: 31536000
                adapter: League\Flysystem\Local\LocalFilesystemAdapter(%wwwDir%/images)
                assets/image/noimage.png: noimage/default.png # copy our default no-image
                assets/image/noimage_user.png: noimage/user.png # copy our default no-image

Storage config options

name type default description
base_path string '' Base path to a directory where the files are accessible.
host null or string null Hostname, use if the files are not stored locally or if you want to generate an absolute links
version_parameter_name string _v A query parameter's name used for a file's version (just for a cache).
signature_parameter_name string _s A query parameter's name used for a signature token.
signature_key null or string null Your private signature key used for a token encryption. Signatures in requests are checked and validated only if this parameter is set.
signature_algorithm string sha256 An algorithm used for encryption of signatures (HMAC).
modifier_separator string , A separator for modifier definitions in a path. For example if you set this parameter as ; then a modifier string in a path will look like this: w:100;o:auto.
modifier_assigner string : An assigner for modifier definitions in a path. For example if you set this parameter as = then a modifier string in a path will look like this: w=100,o=auto.
allowed_pixel_density int[] or float[] [] An array of allowed pixed densities. The validation is enabled when the array is not empty.
allowed_resolutions string[] [] An array of allowed resolutions like 100x, x200 or 100x200. The validation is enabled when the array is not empty.
allowed_qualities int[] [] An array of allowed qualities. The validation is enabled when the array is not empty.
encode_quality int 90 An encode quality for cached images.
cache_max_age int 31536000 The maximum cache age in seconds. The value is used for HTTP headers Cache-Control and Expires.

Image storage configuration example

Now we can register a ImageStorageExtension and define the local image-storage:

    68publishers.image_storage: SixtyEightPublishers\ImageStorage\Bridge\Nette\DI\ImageStorageExtension

    driver: gd # "gd" or "imagick" or "68publishers.imagick", default is "gd"
                adapter: League\Flysystem\Local\LocalFilesystemAdapter(%appDir%/../private-data/images)
                config: # an optional config for source filesystem adapter
            server: local # "local" or "external", default is "local"
                default: noimage/default.png
                user: noimage/user.png
                user: '^user_avatar\/' # the noimage "user" will be used for missing files with paths that matches this regex
                my_preset: {w: 150, ar: '2x1.5'}

Animated GIFs

Animated GIFs are not supported by intervention/image but this package comes with a custom imagick driver that supports it. The driver is used when you pass a value 68publishers.imagick into a driver option.

Basic usage

Basic usage is similar to usage of the file-storage.

Persisting files

Files persisting is almost the same as persisting in the file-storage but source images are stored without a file extension.


/** @var \SixtyEightPublishers\ImageStorage\ImageStorageInterface $storage */

# Create resource from a local file:
$resource = $storage->createResourceFromLocalFile(
    __DIR__ . '/path/to/my-image.jpeg'


# Create resource from a file that is stored in storage:
$resource = $storage->createResource(

# Copy to the new location

Check a file existence


/** @var \SixtyEightPublishers\ImageStorage\ImageStorageInterface $storage */

$pathInfo = $storage->createPathInfo('test/my-image');

if ($storage->exists($pathInfo)) {
    echo 'source image exists!';

if ($storage->exists($pathInfo->withModifiers(['w' => 150]))) {
    echo 'cached image with width 150 in JPEG (default) format exists!';

if ($storage->exists($pathInfo->withModifiers(['w' => 150])->withExt('webp'))) {
    echo 'cached image with width 150 in WEBP format exists!';

Deleting files


use SixtyEightPublishers\ImageStorage\Persistence\ImagePersisterInterface;

/** @var \SixtyEightPublishers\ImageStorage\ImageStorageInterface $storage */

# delete all cached images only:
$storage->delete($storage->createPathInfo('test/my-image'), [
    ImagePersisterInterface::OPTION_DELETE_CACHE_ONLY => TRUE,

# delete cached images and source image:

# delete only cached image with 200px width in PNG format
$storage->delete($storage->createPathInfo('test/my-image.png')->withModifiers(['w' => 200]));

Create links to images

An original images are not accessible. If you want to access an original image you must request it with a modifier ['original' => TRUE].


/** @var \SixtyEightPublishers\ImageStorage\ImageStorageInterface $storage */

$pathInfo = $storage->createPathInfo('test/my-image.png')
    ->withModifiers(['original' => TRUE])

# /images/test/original/my-image.png?_v=1611837352
echo $storage->link($pathInfo);

# /images/test/original/my-image.webp?_v=1611837352
echo $storage->link($pathInfo->withExt('webp'));

# /images/test/ar:2x1,w:200/my-image.webp?_v=1611837352&_s={GENERATED_SIGNATURE_TOKEN}
echo $storage->link($pathInfo->withExt('webp')->withModifiers(['w' => 200, 'ar' => '2x1']));

# you can also wrap PathInfo to FileInfo object:
$fileInfo = $storage->createFileInfo($pathInfo);

# /images/test/original/my-image.png?_v=1611837352
echo $fileInfo->link();

# /images/test/original/my-image.webp?_v=1611837352
echo $fileInfo->withExt('webp')->link();

# /images/test/ar:2x1,w:200/my-image.webp?_v=1611837352&_s={GENERATED_SIGNATURE_TOKEN}
echo $fileInfo->withExt('webp')->withModifiers(['w' => 200, 'ar' => '2x1'])->link();

The HTML attribute srcset can be also generated:


use SixtyEightPublishers\ImageStorage\Responsive\Descriptor\XDescriptor;
use SixtyEightPublishers\ImageStorage\Responsive\Descriptor\WDescriptor;

/** @var \SixtyEightPublishers\ImageStorage\ImageStorageInterface $storage */

$pathInfo = $storage->createPathInfo('test/my-image.png')
    ->withModifiers(['w' => 200, 'ar' => '2x1'])

/images/test/ar:2x1,pd:1,w:200/my-image.png?_v=1611837352&_s={TOKEN} ,
/images/test/ar:2x1,pd:2,w:200/my-image.png?_v=1611837352&_s={TOKEN} 2.0x,
/images/test/ar:2x1,pd:3,w:200/my-image.png?_v=1611837352&_s={TOKEN} 3.0x
echo $storage->srcSet($pathInfo, new XDescriptor(1, 2, 3));

/images/test/ar:2x1,w:200/my-image.png?_v=1611837352&_s={TOKEN} 200w,
/images/test/ar:2x1,w:400/my-image.png?_v=1611837352&_s={TOKEN} 400w,
/images/test/ar:2x1,w:600/my-image.png?_v=1611837352&_s={TOKEN} 600w,
/images/test/ar:2x1,w:800/my-image.png?_v=1611837352&_s={TOKEN} 800w
echo $storage->srcSet($pathInfo, new WDescriptor(200, 400, 600, 800));

# you can also wrap PathInfo to FileInfo object:
$fileInfo = $storage->createFileInfo($pathInfo);

echo $fileInfo->srcSet(new XDescriptor(1, 2, 3));
echo $fileInfo->srcSet(new WDescriptor(200, 400, 600, 800));

Usage with Latte

    68publishers.image_storage.latte: SixtyEightPublishers\ImageStorage\Bridge\Nette\DI\ImageStorageLatteExtension

        create_w_descriptor: w_descriptor # default
        create_x_descriptor: x_descriptor # default
        create_w_descriptor_from_range: w_descriptor_range # default

The extension adds these functions into the Latte:

  • w_descriptor(...) - a shortcut for new SixtyEightPublishers\ImageStorage\Responsive\Descriptor\XDescriptor(...)
  • x_descriptor(...) - a shortcut for new SixtyEightPublishers\ImageStorage\Responsive\Descriptor\WDescriptor(...)
  • w_descriptor_range($min, $max, $step) - a shortcut for SixtyEightPublishers\ImageStorage\Responsive\Descriptor\WDescriptor::fromRange($min, $max, $step)

Basic usage:

{varType SixtyEightPublishers\ImageStorage\FileInfoInterface $fileInfo}

{* Note: method FileInfo::__toString() calls ::link() internally *}

<img src="{$fileInfo->link()}" alt="">
<img srcset="{$fileInfo->srcSet(x_descriptor(1, 2, 3))}" src="{$fileInfo}" alt="">

{* Create FileInfo from string *}
{var $fileInfo = file_info('test/my-image.png')->withModifiers(['o' => 90, 'ar' => '2x1'])}

<img srcset="{$fileInfo->srcSet(w_descriptor(400, 800, 1200))}" src="{$fileInfo}" alt="">

An advanced example with a tag <picture>:

{var $large = file_info('test/my-image.jpeg')->withModifiers([w => 1172, ar => '1x0.29'])}
{var $medium = $large->withModifiers([w => 768, ar => '1x0.59'])}

    <source srcset="{$large->withExt('webp')->srcSet(w_descriptor_range(768, 1172 * 3, 200))}" media="(min-width: 768px)" sizes="(min-width: 1188px) calc(1188px - 2 * 0.5rem), (min-width: 992px) calc(100vw - 2 * 0.5rem), calc(100vw - 2 * 1.5rem)" type="image/webp">
    <source srcset="{$large->srcSet(w_descriptor_range(768, 1172 * 3, 200))}" media="(min-width: 768px)" sizes="(min-width: 1188px) calc(1188px - 2 * 0.5rem), (min-width: 992px) calc(100vw - 2 * 0.5rem), calc(100vw - 2 * 1.5rem)">
    <source srcset="{$medium->withExt('webp')->srcSet(w_descriptor_range(320, 768 * 3, 200))}" sizes="(min-width: 576px) calc(100vw - 2 * 1.5rem), calc(100vw - 2 * 0.5rem)" type="image/webp">
    <source srcset="{$medium->srcSet(w_descriptor_range(320, 768 * 3, 200))}" sizes="(min-width: 576px) calc(100vw - 2 * 1.5rem), calc(100vw - 2 * 0.5rem)">
    <img src="{$large}" alt="">

Symfony Console commands

The image-storage extends a command file-storage:clean with an option cache-only so the command now looks like this:

$ bin/console file-storage:clean [<storage>] [--namespace <value>] [--cache-only]

Supported image formats and modifiers

Image formats

  • JPEG - .jpeg or .jpg
  • Progressive JPEG - .pjpg
  • PNG - .png
  • GIF - .gif
  • WEBP - .webp


Name Shortcut Type Note
Original original - A modifier without a value, use it if you want to return the original image
Height h Integer Can be restricted by parameter AllowedResolutions
Width w Integer Can be restricted by parameter AllowedResolutions
Pixel density pd Integer|Float Can be restricted by parameter AllowedPixelDensity
Aspect ratio ar String Required format is {Int|Float}x{Int|Float} and a height or a width (not both) must be also defined. For example w:200,ar:1x2 is an equivalent of w:200,h:400
Fit f String See supported fits for the list of supported values
Orientation o Integer|String Allowed values are auto, 0, 90, -90, 180, -180, 270, -270
Quality q Integer Can be restricted by parameter AllowedQualities

Supported fits

  • contain - Preserving aspect ratio, resize the image to be as large as possible while ensuring its dimensions are less than or equal to both those specified.
  • stretch - Ignore the aspect ratio of the input and stretch to both provided dimensions.
  • fill - Preserving aspect ratio, contain within both provided dimensions using "letterboxing" where necessary.
  • crop-* - Preserving aspect ratio, ensure the image covers both provided dimensions by cropping to fit.
    • crop-center
    • crop-left
    • crop-right
    • crop-top
    • crop-top-left
    • crop-top-right
    • crop-bottom
    • crop-bottom-left
    • crop-bottom-right

Image server

Local image server

The default image server for each storage is local. That means your application will handle requests and will generate, store and serve modified images. Everything is prepared but the application must provide some endpoint. Here is an example of how to do it:


use SixtyEightPublishers\ImageStorage\Bridge\Nette\Presenter\AbstractImageServerPresenter;

final class ImagePresenter extends AbstractImageServerPresenter
    # You can define a storage name through this property. The default storage is used if the property is not overridden
    protected $storageName = 'local';

In the application's router:

/** @var Nette\Application\Routers\RouteList $router */

$router->addRoute('images/<path .+>', 'Image:default');

Then you must modify the configuration of a web server. For example, if the webserver is Apache then modify a file .htaccess that is located in your www directory.

# locale images
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(images\/)(.+) index.php [L]

The Application will be called only if a static file has not yet been generated. Otherwise, the server will serve the static file.

External image server: an integration with AWS S3 and image-storage-lambda

The image storage can be integrated with the Amazon S3 object storage and the package 68publishers/image-storage-lambda. So your image storage can be completely serverless! Of course you can deploy the image-storage-lambda application manually and also synchronize options from the image-storage with the image-storage-lambda manually.

At least you can follow these simple steps for a partial integration:

  1. Create a deployment bucket on the S3

When you deploy the AWS SAM application in guide mode (sam deploy --guided) the deployment bucket will be created automatically. But the application will be built in a non-guided mode so we must create the bucket manually. If you don't know how to create an S3 bucket please follow the Amazon documentation. We recommend to enable versioning on this bucket.

  1. Required packages league/flysystem-aws-s3-v3 (the S3 adapter for Flysystem) and yosymfony/toml (suggested by this package) in your application
$ composer require league/flysystem-aws-s3-v3 yosymfony/toml
  1. Configure the image storage with the S3 filesystem (an example with a minimal configuration):
        class: Aws\S3\S3Client([... your S3 config ...])
        autowired: no

                # configure what you want but omit the `host` option for now
                adapter: League\Flysystem\AwsS3V3\AwsS3V3Adapter(@s3_client, my-awesome-cache-bucket) # a bucket doesn't exists at this point
            # if you have your own no-images:
                %assetsDir%/noimage: noimage

                adapter: League\Flysystem\AwsS3V3\AwsS3V3Adapter(@s3_client, my-awesome-source-bucket) # a bucket doesn't exists at this point
            server: external
            # if you have your own no-images:
                default: noimage/default.png
                user: noimage/user.png
                user: '^user_avatar\/'
  1. Register and configure a compiler extension ImageStorageLambdaExtension
    68publishers.image_storage.lambda: SixtyEightPublishers\ImageStorage\Bridge\Nette\DI\ImageStorageLambdaExtension

    output_dir: %appDir%/config/image-storage-lambda # this is default
            stack_name: my-awesome-image-storage
            region: eu-central-1

            # optional settings:
            version: 2.0 # default is 1.0
            s3_prefix: custom-prefix # a stack_name is used by default
            confirm_changeset: yes # default false, must be changeset manually confirmed during deploy?
            capabilities: CAPABILITY_IAM # default, CAPABILITY_IAM or CAPABILITY_NAMED_IAM only

            # optional, automatically detected from AwsS3V3Adapter by default
            source_bucket_name: source-bucket-name
            cache_bucket_name: cache-bucket-name
  1. Generate configuration for the image-storage-lambda
$ php bin/console image-storage:lambda:dump-config

The configuration file will be placed by default in a directory app/config/image-storage-lambda/my-awesome-image-storage/samconfig.toml. Keep this file versioned in the Git.

  1. Download image-storage-lambda, build and deploy!

Firstly setup your local environment by requirements defined here. Then download the package outside your project.

$ git clone https://github.com/68publishers/image-storage-lambda.git image-storage-lambda
$ cd ./image-storage-lambda

Unfortunately SAM CLI doesn't allow you to define a path to your samconfig.toml file (related issue https://github.com/awslabs/aws-sam-cli/issues/1615) at this moment. So you must copy the config to the root of the image-storage-lambda application. And then you can build and deploy the application!

$ cp ../my-project/app/config/image-storage-lambda/my-awesome-image-storage/samconfig.toml samconfig.toml
$ sam build
$ sam deploy
  1. Set the CloudFront URL as a host in the image storage config

The URL of your CloudFront distribution is listed in Outputs after a successful deployment. More information are here.

# ...
                host: {CLOUDFRONT URL}
# ...


Before committing any changes, don't forget to run

vendor/bin/php-cs-fixer fix --config=.php_cs.dist -v --dry-run


vendor/bin/tester ./tests