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@jerbob92
Created October 28, 2015 13:21
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Render image into a block Drupal 8 Example by URI
<?php
/**
* @file
* Contains Drupal\mymodule\Plugin\Block\ImageRenderExampleBlockByURI.
*/
namespace Drupal\mymodule\Plugin\Block;
use Drupal\Core\Block\BlockBase;
use Drupal\file\Entity\File;
/**
* Provides a 'ImageRenderExampleBlockByURI' block.
*
* @Block(
* id = "mymodule_imagerenderexampleblockbyuri",
* admin_label = @Translation("MyModule Image Render Example By URI"),
* )
*/
class ImageRenderExampleBlockByURI extends BlockBase {
/**
* {@inheritdoc}
*/
public function build() {
$entity_manager = \Drupal::entityManager()->getStorage('file');
$query = $entity_manager->getQuery();
$query->condition('uri', 'public://my-image.jpg');
$fids = $query->execute();
if (count($fids) && $file = File::load(reset($fids))) {
$variables = array(
'style_name' => 'thumbnail',
'uri' => $file->getFileUri(),
);
// The image.factory service will check if our image is valid.
$image = \Drupal::service('image.factory')->get($file->getFileUri());
if ($image->isValid()) {
$variables['width'] = $image->getWidth();
$variables['height'] = $image->getHeight();
}
else {
$variables['width'] = $variables['height'] = NULL;
}
$logo_build = [
'#theme' => 'image_style',
'#width' => $variables['width'],
'#height' => $variables['height'],
'#style_name' => $variables['style_name'],
'#uri' => $variables['uri'],
];
// Add the file entity to the cache dependencies.
// This will clear our cache when this entity updates.
$renderer = \Drupal::service('renderer');
$renderer->addCacheableDependency($logo_build, $file);
// Return the render array as block content.
return [
'logo' => $logo_build,
];
} else {
// Image not found, return empty block.
return [];
}
}
}
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