# 4.x Migration & Compatibility

For all intents and purposes, Redux 4.x performs the same as 3.x. To improve support of WordPress standards, a number of functions have been renamed. A shim has been included for each of these function with a deprecation notice that only appears when WP_DEBUG is enabled, dev_mode is enabled, or when the site is running locally. It is strongly recommended to migrate the new function names. Most of these functions are internal and will not impact performance.

Below are the affected classes and methods.

# Redux::

3.x	4.x
Redux::getExtensions	Redux::get_extensions
Redux::setExtensions	Redux::set_extensions
Redux::setOption	Redux::set_option
Redux::getOption	Redux::get_option
Redux::getArg	Redux::get_arg
Redux::getArgs	Redux::get_args
Redux::setArgs	Redux::set_args
Redux::setHelpSidebar	Redux::set_help_sidebar
Redux::setHelpTab	Redux::set_help_tab
Redux::removeField	Redux::remove_field
Redux::getField	Redux::get_field
Redux::hideSection	Redux::hide_section
Redux::removeSection	Redux::remove_section
Redux::getSections	Redux::get_sections
Redux::setSections	Redux::set_sections
Redux::getSection	Redux::get_section
Redux::createRedux	Redux::create_redux
Redux::getSection	Redux::get_section
Redux::loadRedux	Redux::load_redux
Redux::extensionPath	Redux::extension_path
Redux::loadExtensions	Redux::load_extensions

# Redux_Functions::

3.x	4.x
Redux_Functions::initWpFilesystem	Redux_Functions::init_wp_filesystem
Redux_Functions::isMin	Redux_Functions::is_min

# Redux_Helpers::

3.x	4.x
Redux_Helpers::getReduxInstances	Redux_Helpers::get_all_instances
Redux_Helpers::getReduxTemplates	Redux_Helpers::get_redux_templates
Redux_Helpers::compileSystemStatus	Redux_Helpers::compile_system_status
Redux_Helpers::makeBoolStr	Redux_Helpers::make_bool_str
Redux_Helpers::cleanFilePath	Redux_Functions_Ex::wp_normalize_path
Redux_Helpers::isTheme	Redux_Helpers::is_theme
Redux_Helpers::reduxAsPlugin	Redux_Core::$_as_plugin
Redux_Helpers::isChildTheme	Redux_Helpers::is_child_theme
Redux_Helpers::wp_normalize_path	Redux_Functions_Ex::wp_normalize_path
Redux_Helpers::isParentTheme	Redux_Helpers::is_parent_theme
Redux_Helpers::trackingObject	Redux_Helpers::get_statistics_object
Redux_Helpers::getTrackingObject	Redux_Helpers::get_statistics_object
Redux_Helpers::isWpDebug	Redux_Helpers::is_wp_debug
Redux_Helpers::isLocalHost	Redux_Helpers::is_local_host
Redux_Helpers::isFieldInUse	Redux_Helpers::is_field_in_use
Redux_Helpers::isFieldInUseByType	Redux_Helpers::is_field_in_use_by_type
Redux_Helpers::tabFromField	Redux_Helpers::tab_from_field

# Redux_Metaboxes::

3.x	4.x
Redux_Metaboxes::getPriority	Redux_Metaboxes::get_priority
Redux_Metaboxes::getBox	Redux_Metaboxes::get_box
Redux_Metaboxes::getBoxes	Redux_Metaboxes::get_boxes
Redux_Metaboxes::setBoxes	Redux_Metaboxes::set_boxes
Redux_Metaboxes::setBox	Redux_Metaboxes::set_box
Redux_Metaboxes::setField	Redux_Metaboxes::set_field
Redux_Metaboxes::getField	Redux_Metaboxes::get_field
Redux_Metaboxes::processFieldsArray	Redux_Metaboxes::process_fields_array
Redux_Metaboxes::processSectionsArray	Redux_Metaboxes::process_sections_array
Redux_Metaboxes::setSection	Redux_Metaboxes::set_section
Redux_Metaboxes::getSection	Redux_Metaboxes::get_section
Redux_Metaboxes::constructFields	Redux_Metaboxes::construct_fields
Redux_Metaboxes::constructSections	Redux_Metaboxes::construct_sections
Redux_Metaboxes::constructBoxes	Redux_Metaboxes::construct_boxes
Redux_Metaboxes::constructArgs	Redux_Metaboxes::construct_args
Redux_Metaboxes::filterMetaboxes	Redux_Metaboxes::filter_metaboxes