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Title Object type File name Summary
hook_block_info_alter function modules/block/block.api.php Change block definition before saving to the database.
hook_block_list_alter function modules/block/block.api.php Act on blocks prior to rendering.
hook_block_view_alter function modules/block/block.api.php Perform alterations to the content of a block.
hook_block_view_MODULE_DELTA_alter function modules/block/block.api.php Perform alterations to a specific block.
hook_comment_view_alter function modules/comment/comment.api.php The comment was built; the module may modify the structured content.
hook_contextual_links_view_alter function modules/contextual/contextual.api.php Alter a contextual links element before it is rendered.
hook_countries_alter function modules/system/system.api.php Alter the default country list.
hook_cron_queue_info_alter function modules/system/system.api.php Alter cron queue information before cron runs.
hook_css_alter function modules/system/system.api.php Alter CSS files before they are output on the page.
hook_dashboard_regions_alter function modules/dashboard/dashboard.api.php Alter dashboard regions provided by modules.
hook_date_formats_alter function modules/system/system.api.php Alter date formats declared by another module.
hook_date_format_types_alter function modules/system/system.api.php Modify existing date types.
hook_drupal_goto_alter function modules/system/system.api.php Change the page the user is sent to by drupal_goto().
hook_element_info_alter function modules/system/system.api.php Alter the element type information returned from modules.
hook_entity_info_alter function modules/system/system.api.php Alter the entity info.
hook_entity_query_alter function modules/system/system.api.php Alter or execute an EntityFieldQuery.
hook_entity_view_alter function modules/system/system.api.php Alter the results of ENTITY_view().
hook_entity_view_mode_alter function modules/system/system.api.php Change the view mode of an entity that is being displayed.
hook_field_attach_prepare_translation_alter function modules/field/field.api.php Perform alterations on field_attach_prepare_translation().
hook_field_attach_preprocess_alter function modules/field/field.api.php Alter field_attach_preprocess() variables.
hook_field_attach_view_alter function modules/field/field.api.php Perform alterations on field_attach_view() or field_view_field().
hook_field_available_languages_alter function modules/field/field.api.php Alter field_available_languages() values.
hook_field_display_alter function modules/field/field.api.php Alters the display settings of a field before it gets displayed.
hook_field_display_ENTITY_TYPE_alter function modules/field/field.api.php Alters the display settings of a field on a given entity type before it gets displayed.
hook_field_extra_fields_alter function modules/field/field.api.php Alter "pseudo-field" components on fieldable entities.
hook_field_extra_fields_display_alter function modules/field/field.api.php Alters the display settings of pseudo-fields before an entity is displayed.
hook_field_formatter_info_alter function modules/field/field.api.php Perform alterations on Field API formatter types.
hook_field_info_alter function modules/field/field.api.php Perform alterations on Field API field types.
hook_field_language_alter function modules/field/field.api.php Perform alterations on field_language() values.
hook_field_storage_details_alter function modules/field/field.api.php Perform alterations on Field API storage details.
hook_field_storage_info_alter function modules/field/field.api.php Perform alterations on Field API storage types.
hook_field_widget_form_alter function modules/field/field.api.php Alter forms for field widgets provided by other modules.
hook_field_widget_info_alter function modules/field/field.api.php Perform alterations on Field API widget types.
hook_field_widget_properties_alter function modules/field/field.api.php Alters the widget properties of a field instance before it gets displayed.
hook_field_widget_properties_ENTITY_TYPE_alter function modules/field/field.api.php Alters the widget properties of a field instance on a given entity type
before it gets displayed.
hook_field_widget_WIDGET_TYPE_form_alter function modules/field/field.api.php Alter widget forms for a specific widget provided by another module.
hook_filetransfer_info_alter function modules/system/system.api.php Alter the FileTransfer class registry.
hook_file_download_access_alter function modules/file/file.api.php Alter the access rules applied to a file download.
hook_file_mimetype_mapping_alter function modules/system/system.api.php Alter MIME type mappings used to determine MIME type from a file extension.
hook_file_url_alter function modules/system/system.api.php Alter the URL to a file.
hook_filter_info_alter function modules/filter/filter.api.php Perform alterations on filter definitions.
hook_form_alter function modules/system/system.api.php Perform alterations before a form is rendered.
hook_form_BASE_FORM_ID_alter function modules/system/system.api.php Provide a form-specific alteration for shared ('base') forms.
hook_form_FORM_ID_alter function modules/system/system.api.php Provide a form-specific alteration instead of the global hook_form_alter().
hook_form_system_theme_settings_alter function modules/system/theme.api.php Allow themes to alter the theme-specific settings form.
hook_hook_info_alter function modules/system/system.api.php Alter information from hook_hook_info().
hook_html_head_alter function modules/system/system.api.php Alter XHTML HEAD tags before they are rendered by drupal_get_html_head().
hook_image_effect_info_alter function modules/image/image.api.php Alter the information provided in hook_image_effect_info().
hook_image_styles_alter function modules/image/image.api.php Modify any image styles provided by other modules or the user.
hook_install_tasks_alter function modules/system/system.api.php Alter the full list of installation tasks.

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