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Title Object type File name Summary
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.
hook_js_alter function modules/system/system.api.php Perform necessary alterations to the JavaScript before it is presented on
the page.
hook_language_fallback_candidates_alter function modules/system/language.api.php Perform alterations on the language fallback candidates.
hook_language_negotiation_info_alter function modules/system/language.api.php Perform alterations on language negoiation providers.
hook_language_switch_links_alter function modules/system/language.api.php Perform alterations on language switcher links.
hook_language_types_info_alter function modules/system/language.api.php Perform alterations on language types.
hook_library_alter function modules/system/system.api.php Alters the JavaScript/CSS library registry.
hook_mail_alter function modules/system/system.api.php Alter an email message created with the drupal_mail() function.
hook_menu_alter function modules/system/system.api.php Alter the data being saved to the {menu_router} table after hook_menu is invoked.
hook_menu_breadcrumb_alter function modules/system/system.api.php Alter links in the active trail before it is rendered as the breadcrumb.
hook_menu_contextual_links_alter function modules/system/system.api.php Alter contextual links before they are rendered.
hook_menu_get_item_alter function modules/system/system.api.php Alter a menu router item right after it has been retrieved from the database or cache.
hook_menu_link_alter function modules/system/system.api.php Alter the data being saved to the {menu_links} table by menu_link_save().
hook_menu_local_tasks_alter function modules/system/system.api.php Alter tabs and actions displayed on the page before they are rendered.
hook_menu_site_status_alter function modules/system/system.api.php Control site status before menu dispatching.
hook_module_implements_alter function modules/system/system.api.php Alter the registry of modules implementing a hook.
hook_node_access_records_alter function modules/node/node.api.php Alter permissions for a node before it is written to the database.
hook_node_grants_alter function modules/node/node.api.php Alter user access rules when trying to view, edit or delete a node.
hook_node_view_alter function modules/node/node.api.php Alter the results of node_view().
hook_openid_discovery_method_info_alter function modules/openid/openid.api.php Allow modules to alter discovery methods.
hook_openid_normalization_method_info_alter function modules/openid/openid.api.php Allow modules to alter normalization methods.
hook_page_alter function modules/system/system.api.php Perform alterations before a page is rendered.
hook_page_delivery_callback_alter function modules/system/system.api.php Alters the delivery callback used to send the result of the page callback to the browser.
hook_query_alter function modules/system/system.api.php Perform alterations to a structured query.
hook_query_TAG_alter function modules/system/system.api.php Perform alterations to a structured query for a given tag.
hook_registry_files_alter function modules/system/system.api.php Perform necessary alterations to the list of files parsed by the registry.
hook_schema_alter function modules/system/system.api.php Perform alterations to existing database schemas.
hook_simpletest_alter function modules/simpletest/simpletest.api.php Alter the list of tests.
hook_stream_wrappers_alter function modules/system/system.api.php Alters the list of PHP stream wrapper implementations.
hook_system_info_alter function modules/system/system.api.php Alter the information parsed from module and theme .info files
hook_system_themes_page_alter function modules/system/system.api.php Alters theme operation links.
hook_taxonomy_term_view_alter function modules/taxonomy/taxonomy.api.php Alter the results of taxonomy_term_view().
hook_theme_registry_alter function modules/system/system.api.php Alter the theme registry information returned from hook_theme().
hook_tokens_alter function modules/system/system.api.php Alter replacement values for placeholder tokens.
hook_token_info_alter function modules/system/system.api.php Alter the metadata about available placeholder tokens and token types.
hook_translated_menu_link_alter function modules/system/system.api.php Alter a menu link after it has been translated and before it is rendered.
hook_trigger_info_alter function modules/trigger/trigger.api.php Alter triggers declared by hook_trigger_info().
hook_updater_info_alter function modules/system/system.api.php Alter the Updater information array.

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