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Title Object type File name Summary
hook_file_url_alter function core/lib/Drupal/Core/File/file.api.php Alter the URL to a file.
hook_filter_info_alter function core/modules/filter/filter.api.php Perform alterations on filter definitions.
hook_filter_secure_image_alter function core/modules/filter/filter.api.php Alters images with an invalid source.
hook_form_alter function core/lib/Drupal/Core/Form/form.api.php Perform alterations before a form is rendered.
hook_form_BASE_FORM_ID_alter function core/lib/Drupal/Core/Form/form.api.php Provide a form-specific alteration for shared ('base') forms.
hook_form_FORM_ID_alter function core/lib/Drupal/Core/Form/form.api.php Provide a form-specific alteration instead of the global hook_form_alter().
hook_form_system_theme_settings_alter function core/lib/Drupal/Core/Render/theme.api.php Allow themes to alter the theme-specific settings form.
hook_hal_relation_uri_alter function core/modules/hal/hal.api.php Alter the HAL relation URI.
hook_hal_type_uri_alter function core/modules/hal/hal.api.php Alter the HAL type URI.
hook_help_section_info_alter function core/modules/help/help.api.php Perform alterations on help page section plugin definitions.
hook_help_topics_info_alter function core/modules/help_topics/help_topics.api.php Perform alterations on help topic definitions.
hook_image_effect_info_alter function core/modules/image/image.api.php Alter the information provided in \Drupal\image\Annotation\ImageEffect.
hook_install_tasks_alter function core/lib/Drupal/Core/Extension/module.api.php Alter the full list of installation tasks.
hook_js_alter function core/lib/Drupal/Core/Render/theme.api.php Alters JavaScript before it is presented on the page.
hook_js_settings_alter function core/lib/Drupal/Core/Render/theme.api.php Perform necessary alterations to the JavaScript settings (drupalSettings).
hook_language_fallback_candidates_alter function core/modules/language/language.api.php Allow modules to alter the language fallback candidates.
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/Menu/menu.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_quickedit_editor_alter function core/modules/quickedit/quickedit.api.php Allow modules to alter in-place editor plugin metadata.
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.

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