Title: 5.6.0 | Developer.WordPress.org --- # New and updated in 5.6.0 Functions Hooks Classes Methods * hook[wp_authorize_application_password_form_approved_no_js](https://developer.wordpress.org/reference/hooks/wp_authorize_application_password_form_approved_no_js/) * Fires in the Authorize Application Password new password section in the no-JS version. * Used by [0 functions](https://developer.wordpress.org/reference/hooks/wp_authorize_application_password_form_approved_no_js/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/wp_authorize_application_password_form_approved_no_js/#uses) | Source: [wp-admin/authorize-application.php:236](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-admin/authorize-application.php#L236-L236) * function[wpmu_new_site_admin_notification()](https://developer.wordpress.org/reference/functions/wpmu_new_site_admin_notification/) * Notifies the Multisite network administrator that a new site was created. * Used by [0 functions](https://developer.wordpress.org/reference/functions/wpmu_new_site_admin_notification/#used-by) | Uses [16 functions](https://developer.wordpress.org/reference/functions/wpmu_new_site_admin_notification/#uses) | Source: [wp-includes/ms-functions.php:1780](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/ms-functions.php#L1780-L1879) * hook[send_new_site_email](https://developer.wordpress.org/reference/hooks/send_new_site_email/) * Filters whether to send an email to the Multisite network administrator when a new site is created. * Used by [1 function](https://developer.wordpress.org/reference/hooks/send_new_site_email/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/send_new_site_email/#uses) | Source: [wp-includes/ms-functions.php:1800](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/ms-functions.php#L1800-L1800) * hook[new_site_email](https://developer.wordpress.org/reference/hooks/new_site_email/) * Filters the content of the email sent to the Multisite network administrator when a new site is created. * Used by [1 function](https://developer.wordpress.org/reference/hooks/new_site_email/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/new_site_email/#uses) | Source: [wp-includes/ms-functions.php:1865](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/ms-functions.php#L1865-L1865) * function[get_block_wrapper_attributes()](https://developer.wordpress.org/reference/functions/get_block_wrapper_attributes/) * Generates a string of attributes by applying to the current block being rendered all of the features that the block supports. * Used by [0 functions](https://developer.wordpress.org/reference/functions/get_block_wrapper_attributes/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/get_block_wrapper_attributes/#uses) | Source: [wp-includes/class-wp-block-supports.php:203](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/class-wp-block-supports.php#L203-L269) * class[WP_Block_Supports](https://developer.wordpress.org/reference/classes/wp_block_supports/) * Class encapsulating and implementing Block Supports. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_block_supports/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_block_supports/#uses) | Source: [wp-includes/class-wp-block-supports.php:20](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/class-wp-block-supports.php#L20-L192) * method[WP_Block_Supports::get_instance()](https://developer.wordpress.org/reference/classes/wp_block_supports/get_instance/) * Utility method to retrieve the main instance of the class. * Used by [2 functions](https://developer.wordpress.org/reference/classes/wp_block_supports/get_instance/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_block_supports/get_instance/#uses) | Source: [wp-includes/class-wp-block-supports.php:62](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/class-wp-block-supports.php#L62-L68) * method[WP_Block_Supports::init()](https://developer.wordpress.org/reference/classes/wp_block_supports/init/) * Initializes the block supports. It registers the block supports block attributes. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_block_supports/init/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_block_supports/init/#uses) | Source: [wp-includes/class-wp-block-supports.php:77](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/class-wp-block-supports.php#L77-L80) * method[WP_Block_Supports::register()](https://developer.wordpress.org/reference/classes/wp_block_supports/register/) * Registers a block support. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_block_supports/register/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_block_supports/register/#uses) | Source: [wp-includes/class-wp-block-supports.php:99](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/class-wp-block-supports.php#L99-L104) * method[WP_Block_Supports::apply_block_supports()](https://developer.wordpress.org/reference/classes/wp_block_supports/apply_block_supports/) * Generates an array of HTML attributes, such as classes, by applying to the given block all of the features that the block supports. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_block_supports/apply_block_supports/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_block_supports/apply_block_supports/#uses) | Source: [wp-includes/class-wp-block-supports.php:114](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/class-wp-block-supports.php#L114-L160) * method[WP_Block_Supports::register_attributes()](https://developer.wordpress.org/reference/classes/wp_block_supports/register_attributes/) * Registers the block attributes required by the different block supports. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_block_supports/register_attributes/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_block_supports/register_attributes/#uses) | Source: [wp-includes/class-wp-block-supports.php:169](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/class-wp-block-supports.php#L169-L191) * function[wp_is_json_media_type()](https://developer.wordpress.org/reference/functions/wp_is_json_media_type/) * Checks whether a string is a valid JSON Media Type. * Used by [2 functions](https://developer.wordpress.org/reference/functions/wp_is_json_media_type/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/functions/wp_is_json_media_type/#uses) | Source: [wp-includes/load.php:1964](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/load.php#L1964-L1972) * hook[is_wp_error_instance](https://developer.wordpress.org/reference/hooks/is_wp_error_instance/) * Fires when `is_wp_error()` is called and its parameter is an instance of WP_Error. * Used by [1 function](https://developer.wordpress.org/reference/hooks/is_wp_error_instance/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/is_wp_error_instance/#uses) | Source: [wp-includes/load.php:1815](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/load.php#L1815-L1815) * function[wp_populate_basic_auth_from_authorization_header()](https://developer.wordpress.org/reference/functions/wp_populate_basic_auth_from_authorization_header/) * Populates the Basic Auth server details from the Authorization header. * Used by [1 function](https://developer.wordpress.org/reference/functions/wp_populate_basic_auth_from_authorization_header/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/functions/wp_populate_basic_auth_from_authorization_header/#uses) | Source: [wp-includes/load.php:106](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/load.php#L106-L139) * method[WP_REST_Server::get_max_batch_size()](https://developer.wordpress.org/reference/classes/wp_rest_server/get_max_batch_size/) * Gets the maximum number of requests that can be included in a batch. * Used by [1 function](https://developer.wordpress.org/reference/classes/wp_rest_server/get_max_batch_size/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_rest_server/get_max_batch_size/#uses) | Source: [wp-includes/rest-api/class-wp-rest-server.php:1722](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/rest-api/class-wp-rest-server.php#L1722-L1731) * hook[rest_get_max_batch_size](https://developer.wordpress.org/reference/hooks/rest_get_max_batch_size/) * Filters the maximum number of REST API requests that can be included in a batch. * Used by [1 function](https://developer.wordpress.org/reference/hooks/rest_get_max_batch_size/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/rest_get_max_batch_size/#uses) | Source: [wp-includes/rest-api/class-wp-rest-server.php:1730](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/rest-api/class-wp-rest-server.php#L1730-L1730) * method[WP_REST_Server::serve_batch_request_v1()](https://developer.wordpress.org/reference/classes/wp_rest_server/serve_batch_request_v1/) * Serves the batch/v1 request. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_rest_server/serve_batch_request_v1/#used-by) | Uses [13 functions](https://developer.wordpress.org/reference/classes/wp_rest_server/serve_batch_request_v1/#uses) | Source: [wp-includes/rest-api/class-wp-rest-server.php:1741](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/rest-api/class-wp-rest-server.php#L1741-L1900) * method[WP_REST_Server::match_request_to_handler()](https://developer.wordpress.org/reference/classes/wp_rest_server/match_request_to_handler/) * Matches a request object to its handler. * Used by [3 functions](https://developer.wordpress.org/reference/classes/wp_rest_server/match_request_to_handler/#used-by) | Uses [5 functions](https://developer.wordpress.org/reference/classes/wp_rest_server/match_request_to_handler/#uses) | Source: [wp-includes/rest-api/class-wp-rest-server.php:1153](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/rest-api/class-wp-rest-server.php#L1153-L1224) * method[WP_REST_Server::respond_to_request()](https://developer.wordpress.org/reference/classes/wp_rest_server/respond_to_request/) * Dispatches the request to the callback handler. * Used by [2 functions](https://developer.wordpress.org/reference/classes/wp_rest_server/respond_to_request/#used-by) | Uses [7 functions](https://developer.wordpress.org/reference/classes/wp_rest_server/respond_to_request/#uses) | Source: [wp-includes/rest-api/class-wp-rest-server.php:1238](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/rest-api/class-wp-rest-server.php#L1238-L1330) * method[WP_REST_Site_Health_Controller::load_admin_textdomain()](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/load_admin_textdomain/) * Loads the admin textdomain for Site Health tests. * Used by [7 functions](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/load_admin_textdomain/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/load_admin_textdomain/#uses) | Source: [wp-includes/rest-api/endpoints/class-wp-rest-site-health-controller.php:335](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/rest-api/endpoints/class-wp-rest-site-health-controller.php#L335-L341) * method[WP_REST_Site_Health_Controller::get_item_schema()](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/get_item_schema/) * Gets the schema for each site health test. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/get_item_schema/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/get_item_schema/#uses) | Source: [wp-includes/rest-api/endpoints/class-wp-rest-site-health-controller.php:350](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/rest-api/endpoints/class-wp-rest-site-health-controller.php#L350-L406) * method[WP_REST_Site_Health_Controller::__construct()](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/__construct/) * Site Health controller constructor. * Used by [1 function](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/__construct/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/__construct/#uses) | Source: [wp-includes/rest-api/endpoints/class-wp-rest-site-health-controller.php:35](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/rest-api/endpoints/class-wp-rest-site-health-controller.php#L35-L40) * method[WP_REST_Site_Health_Controller::register_routes()](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/register_routes/) * Registers API routes. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/register_routes/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/register_routes/#uses) | Source: [wp-includes/rest-api/endpoints/class-wp-rest-site-health-controller.php:50](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/rest-api/endpoints/class-wp-rest-site-health-controller.php#L50-L178) * method[WP_REST_Site_Health_Controller::validate_request_permission()](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/validate_request_permission/) * Validates if the current user can request this REST endpoint. * Used by [1 function](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/validate_request_permission/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/validate_request_permission/#uses) | Source: [wp-includes/rest-api/endpoints/class-wp-rest-site-health-controller.php:188](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/rest-api/endpoints/class-wp-rest-site-health-controller.php#L188-L202) * hook[site_health_test_rest_capability_{$check}](https://developer.wordpress.org/reference/hooks/site_health_test_rest_capability_check/) * Filters the capability needed to run a given Site Health check. * Used by [1 function](https://developer.wordpress.org/reference/hooks/site_health_test_rest_capability_check/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/site_health_test_rest_capability_check/#uses) | Source: [wp-includes/rest-api/endpoints/class-wp-rest-site-health-controller.php:199](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/rest-api/endpoints/class-wp-rest-site-health-controller.php#L199-L199) * method[WP_REST_Site_Health_Controller::test_background_updates()](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/test_background_updates/) * Checks if background updates work as expected. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/test_background_updates/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/test_background_updates/#uses) | Source: [wp-includes/rest-api/endpoints/class-wp-rest-site-health-controller.php:211](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/rest-api/endpoints/class-wp-rest-site-health-controller.php#L211-L214) * method[WP_REST_Site_Health_Controller::test_dotorg_communication()](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/test_dotorg_communication/) * Checks that the site can reach the WordPress.org API. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/test_dotorg_communication/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/test_dotorg_communication/#uses) | Source: [wp-includes/rest-api/endpoints/class-wp-rest-site-health-controller.php:223](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/rest-api/endpoints/class-wp-rest-site-health-controller.php#L223-L226) * method[WP_REST_Site_Health_Controller::test_loopback_requests()](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/test_loopback_requests/) * Checks that loopbacks can be performed. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/test_loopback_requests/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/test_loopback_requests/#uses) | Source: [wp-includes/rest-api/endpoints/class-wp-rest-site-health-controller.php:235](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/rest-api/endpoints/class-wp-rest-site-health-controller.php#L235-L238) * method[WP_REST_Site_Health_Controller::test_authorization_header()](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/test_authorization_header/) * Checks that the authorization header is valid. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/test_authorization_header/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/test_authorization_header/#uses) | Source: [wp-includes/rest-api/endpoints/class-wp-rest-site-health-controller.php:259](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/rest-api/endpoints/class-wp-rest-site-health-controller.php#L259-L262) * method[WP_REST_Site_Health_Controller::get_directory_sizes()](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/get_directory_sizes/) * Gets the current directory sizes for this install. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/get_directory_sizes/#used-by) | Uses [5 functions](https://developer.wordpress.org/reference/classes/wp_rest_site_health_controller/get_directory_sizes/#uses) | Source: [wp-includes/rest-api/endpoints/class-wp-rest-site-health-controller.php:283](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/rest-api/endpoints/class-wp-rest-site-health-controller.php#L283-L325) 1 [2](https://developer.wordpress.org/reference/since/5.6.0/page/2/?output_format=md) [3](https://developer.wordpress.org/reference/since/5.6.0/page/3/?output_format=md)… [7](https://developer.wordpress.org/reference/since/5.6.0/page/7/?output_format=md) [Next 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