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Title Object type File name Summary
hook_language_fallback_candidates_OPERATION_alter function core/modules/language/language.api.php Allow modules to alter the fallback candidates for specific operations.
hook_language_negotiation_info_alter function core/modules/language/language.api.php Perform alterations on language negotiation methods.
hook_language_switch_links_alter function core/lib/Drupal/Core/Language/language.api.php Perform alterations on language switcher links.
hook_language_types_info_alter function core/modules/language/language.api.php Perform alterations on language types.
hook_layout_alter function core/core.api.php Allow modules to alter layout plugin definitions.
hook_library_info_alter function core/lib/Drupal/Core/Render/theme.api.php Alter libraries provided by an extension.
hook_link_alter function core/lib/Drupal/Core/Utility/link.api.php Alter the parameters for links.
hook_locale_translation_projects_alter function core/modules/locale/locale.api.php Alter the list of projects to be updated by locale's interface translation.
hook_local_tasks_alter function core/lib/Drupal/Core/Menu/menu.api.php Alter local tasks plugins.
hook_mail_alter function core/core.api.php Alter an email message created with MailManagerInterface->mail().
hook_mail_backend_info_alter function core/core.api.php Alter the list of mail backend plugin definitions.
hook_media_source_info_alter function core/modules/media/media.api.php Alters the information provided in \Drupal\media\Annotation\MediaSource.
hook_menu_links_discovered_alter function core/lib/Drupal/Core/Menu/menu.api.php Alters all the menu links discovered by the menu link plugin manager.
hook_menu_local_actions_alter function core/lib/Drupal/Core/Menu/menu.api.php Alter local actions plugins.
hook_menu_local_tasks_alter function core/lib/Drupal/Core/Menu/menu.api.php Alter local tasks displayed on the page before they are rendered.
hook_migration_plugins_alter function core/modules/migrate/migrate.api.php Allows altering the list of discovered migration plugins.
hook_module_implements_alter function core/lib/Drupal/Core/Extension/module.api.php Alter the registry of modules implementing a hook.
hook_node_access_records_alter function core/modules/node/node.api.php Alter permissions for a node before it is written to the database.
hook_node_grants_alter function core/modules/node/node.api.php Alter user access rules when trying to view, edit or delete a node.
hook_node_links_alter function core/modules/node/node.api.php Alter the links of a node.
hook_oembed_resource_url_alter function core/modules/media/media.api.php Alters an oEmbed resource URL before it is fetched.
hook_options_list_alter function core/modules/options/options.api.php Alters the list of options to be displayed for a field.
hook_page_attachments_alter function core/lib/Drupal/Core/Render/theme.api.php Alter attachments (typically assets) to a page before it is rendered.
hook_plugin_filter_TYPE_alter function core/lib/Drupal/Core/Plugin/plugin.api.php Alter the filtering of plugin definitions for a specific plugin type.
hook_plugin_filter_TYPE__CONSUMER_alter function core/lib/Drupal/Core/Plugin/plugin.api.php Alter the filtering of plugin definitions for a specific type and consumer.
hook_query_alter function core/lib/Drupal/Core/Database/database.api.php Perform alterations to a structured query.
hook_query_TAG_alter function core/lib/Drupal/Core/Database/database.api.php Perform alterations to a structured query for a given tag.
hook_queue_info_alter function core/core.api.php Alter cron queue information before cron runs.
hook_requirements_alter function core/lib/Drupal/Core/Extension/module.api.php Alters requirements data.
hook_rest_resource_alter function core/modules/rest/rest.api.php Alter the resource plugin definitions.
hook_search_plugin_alter function core/modules/search/search.api.php Alter search plugin definitions.
hook_system_breadcrumb_alter function core/lib/Drupal/Core/Menu/menu.api.php Perform alterations to the breadcrumb built by the BreadcrumbManager.
hook_system_info_alter function core/lib/Drupal/Core/Extension/module.api.php Alter the information parsed from module and theme .info.yml files.
hook_system_themes_page_alter function core/modules/system/system.api.php Alters theme operation links.
hook_template_preprocess_default_variables_alter function core/lib/Drupal/Core/Render/theme.api.php Alter the default, hook-independent variables for all templates.
hook_theme_registry_alter function core/lib/Drupal/Core/Render/theme.api.php Alter the theme registry information returned from hook_theme().
hook_theme_suggestions_alter function core/lib/Drupal/Core/Render/theme.api.php Alters named suggestions for all theme hooks.
hook_theme_suggestions_HOOK_alter function core/lib/Drupal/Core/Render/theme.api.php Alters named suggestions for a specific theme hook.
hook_tokens_alter function core/lib/Drupal/Core/Utility/token.api.php Alter replacement values for placeholder tokens.
hook_token_info_alter function core/lib/Drupal/Core/Utility/token.api.php Alter the metadata about available placeholder tokens and token types.
hook_toolbar_alter function core/modules/toolbar/toolbar.api.php Alter the toolbar menu after hook_toolbar() is invoked.
hook_tour_tips_alter function core/modules/tour/tour.api.php Allow modules to alter tour items before render.
hook_tour_tips_info_alter function core/modules/tour/tour.api.php Allow modules to alter tip plugin definitions.
hook_transliteration_overrides_alter function core/lib/Drupal/Core/Language/language.api.php Provide language-specific overrides for transliteration.
hook_updater_info_alter function core/lib/Drupal/Core/Extension/module.api.php Alter the Updater information array.
hook_update_projects_alter function core/modules/update/update.api.php Alter the list of projects before fetching data and comparing versions.
hook_update_status_alter function core/modules/update/update.api.php Alter the information about available updates for projects.
hook_user_cancel_methods_alter function core/modules/user/user.api.php Modify account cancellation methods.
hook_user_format_name_alter function core/modules/user/user.api.php Alter the username that is displayed for a user.
hook_validation_constraint_alter function core/core.api.php Alter validation constraint plugin definitions.

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