function hook_preprocess_HOOK

Same name and namespace in other branches
  1. 7.x modules/system/theme.api.php \hook_preprocess_HOOK()
  2. 8.9.x core/lib/Drupal/Core/Render/theme.api.php \hook_preprocess_HOOK()
  3. 10 core/lib/Drupal/Core/Render/theme.api.php \hook_preprocess_HOOK()
  4. 11.x core/lib/Drupal/Core/Render/theme.api.php \hook_preprocess_HOOK()

Preprocess theme variables for a specific theme hook.

This hook allows modules to preprocess theme variables for a specific theme hook. It should only be used if a module needs to override or add to the theme preprocessing for a theme hook it didn't define.

For more detailed information, see the Theme system overview topic.


$variables: The variables array (modify in place).

Related topics

313 functions implement hook_preprocess_HOOK()

Note: this list is generated by pattern matching, so it may include some functions that are not actually implementations of this hook.

aggregator_preprocess_block in core/modules/aggregator/aggregator.module
Implements hook_preprocess_HOOK() for block templates.
bartik_preprocess_block in core/themes/bartik/bartik.theme
Implements hook_preprocess_HOOK() for block.html.twig.
bartik_preprocess_html in core/themes/bartik/bartik.theme
Implements hook_preprocess_HOOK() for HTML document templates.
bartik_preprocess_image_widget in core/themes/bartik/bartik.theme
Implements hook_preprocess_image_widget().
bartik_preprocess_links in core/themes/bartik/bartik.theme
Implements template_preprocess_links().

... See full list


core/lib/Drupal/Core/Render/theme.api.php, line 588


function hook_preprocess_HOOK(&$variables) {
    // This example is from rdf_preprocess_image(). It adds an RDF attribute
    // to the image hook's variables.
    $variables['attributes']['typeof'] = [

Buggy or inaccurate documentation? Please file an issue. Need support? Need help programming? Connect with the Drupal community.