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().

contextual_preprocess in modules/contextual/contextual.module

Implements hook_preprocess().

field_attach_preprocess in modules/field/field.attach.inc

Populate the template variables with the field values available for rendering.

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

#[Hook('preprocess')]

search_invoke_preprocess in modules/search/search.module

Invokes hook_search_preprocess() in modules.

template_preprocess in includes/theme.inc

Adds a default set of helper variables for variable processors and templates.