template_preprocess_image(&$variables)
Prepares variables for image templates.
Default template: image.html.twig.
array $variables: An associative array containing:
function template_preprocess_image(&$variables) { if (!empty($variables['uri'])) { $variables['attributes']['src'] = file_url_transform_relative(file_create_url($variables['uri'])); } // Generate a srcset attribute conforming to the spec at // http://www.w3.org/html/wg/drafts/html/master/embedded-content.html#attr-img-srcset if (!empty($variables['srcset'])) { $srcset = array(); foreach ($variables['srcset'] as $src) { // URI is mandatory. $source = file_url_transform_relative(file_create_url($src['uri'])); if (isset($src['width']) && !empty($src['width'])) { $source .= ' ' . $src['width']; } elseif (isset($src['multiplier']) && !empty($src['multiplier'])) { $source .= ' ' . $src['multiplier']; } $srcset[] = $source; } $variables['attributes']['srcset'] = implode(', ', $srcset); } foreach (array('width', 'height', 'alt', 'title', 'sizes') as $key) { if (isset($variables[$key])) { // If the property has already been defined in the attributes, // do not override, including NULL. if (array_key_exists($key, $variables['attributes'])) { continue; } $variables['attributes'][$key] = $variables[$key]; } } }
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https://api.drupal.org/api/drupal/core!includes!theme.inc/function/template_preprocess_image/8.1.x