7 functions implement hook_preprocess()

Note: the procedural functions in this list are found by pattern matching, so the list may include some functions that are not actually implementations of this hook.

CommonTestThemeHooks::preprocess in core/modules/system/tests/modules/common_test/src/Hook/CommonTestThemeHooks.php

Implements hook_preprocess().

ContextualThemeHooks::preprocess in core/modules/contextual/src/Hook/ContextualThemeHooks.php

Implements hook_preprocess().

ModuleTestOopPreprocessThemeHooks::rootPreprocess in core/modules/system/tests/modules/module_test_oop_preprocess/src/Hook/ModuleTestOopPreprocessThemeHooks.php

#[Hook('preprocess')]

module_test_procedural_preprocess_preprocess in core/modules/system/tests/modules/module_test_procedural_preprocess/module_test_procedural_preprocess.module

search_langcode_test_search_preprocess in core/modules/search/tests/modules/search_langcode_test/search_langcode_test.module

Implements hook_search_preprocess().

template_preprocess in core/includes/theme.inc

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

template_preprocess_theme_test_deprecations_preprocess in core/modules/system/tests/modules/theme_test/theme_test.module

Implements template_preprocess_HOOK() for theme_test_deprecations_preprocess.