function template_preprocess in Drupal 8

Same name and namespace in other branches

1. 6 includes/theme.inc \template_preprocess()
2. 7 includes/theme.inc \template_preprocess()
3. 9 core/includes/theme.inc \template_preprocess()

Adds a default set of helper variables for preprocessors and templates.

This function is called for every theme hook. It is the first in the sequence of preprocessing functions called when preparing variables for a template.

See the Default theme implementations topic for details.

1 call to template_preprocess()

ThemeManager::render in core/lib/Drupal/Core/Theme/ThemeManager.php

Generates themed output.

6 string references to 'template_preprocess'

RegistryLegacyTest::testSuggestionPreprocessFunctions in core/tests/Drupal/KernelTests/Core/Theme/RegistryLegacyTest.php

Tests the theme registry with theme functions with suggestions.

RegistryTest::testMultipleSubThemes in core/tests/Drupal/KernelTests/Core/Theme/RegistryTest.php

Tests the theme registry with multiple subthemes.

RegistryTest::testSuggestionPreprocessFunctions in core/tests/Drupal/KernelTests/Core/Theme/RegistryTest.php

Tests the theme registry with suggestions.

RegistryTest::testThemeTemplatesRegisteredByModules in core/tests/Drupal/KernelTests/Core/Theme/RegistryTest.php

Tests theme-provided templates that are registered by modules.

user_user_login in core/modules/user/user.module

Implements hook_user_login().

... See full list

File

core/includes/theme.inc, line 1227

The theme system, which controls the output of Drupal.

Code

function template_preprocess(&$variables, $hook, $info) {

  // Merge in variables that don't depend on hook and don't change during a
  // single page request.
  // Use the advanced drupal_static() pattern, since this is called very often.
  static $drupal_static_fast;
  if (!isset($drupal_static_fast)) {
    $drupal_static_fast['default_variables'] =& drupal_static(__FUNCTION__);
  }
  $default_variables =& $drupal_static_fast['default_variables'];
  if (!isset($default_variables)) {
    $default_variables = _template_preprocess_default_variables();
  }
  $variables += $default_variables;

  // When theming a render element, merge its #attributes into
  // $variables['attributes'].
  if (isset($info['render element'])) {
    $key = $info['render element'];
    if (isset($variables[$key]['#attributes'])) {
      $variables['attributes'] = AttributeHelper::mergeCollections($variables['attributes'], $variables[$key]['#attributes']);
    }
  }
}