Code Modernization: REST API: Use null coalescing operator in place of isset() in ternaries.

Developed as a subset of https://github.com/WordPress/wordpress-develop/pull/10654
Initially developed in https://github.com/WordPress/wordpress-develop/pull/4886

Follow-up to [61424], [61404], [61403].

Props costdev, westonruter.
See #58874, #63430.

Built from https://develop.svn.wordpress.org/trunk@61429


git-svn-id: http://core.svn.wordpress.org/trunk@60741 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/rest-api.php

@@ -952,7 +952,7 @@ function rest_filter_response_fields( $response, $server, $request ) {
 				// Skip any sub-properties if their parent prop is already marked for inclusion.
 				break 2;
 			}
-			$ref[ $next ] = isset( $ref[ $next ] ) ? $ref[ $next ] : array();
+			$ref[ $next ] = $ref[ $next ] ?? array();
 			$ref          = &$ref[ $next ];
 		}
 		$last         = array_shift( $parts );
@@ -3088,7 +3088,7 @@ function rest_filter_response_by_context( $response_data, $schema, $context ) {
 		$check = array();
 
 		if ( $is_array_type ) {
-			$check = isset( $schema['items'] ) ? $schema['items'] : array();
+			$check = $schema['items'] ?? array();
 		} elseif ( $is_object_type ) {
 			if ( isset( $schema['properties'][ $key ] ) ) {
 				$check = $schema['properties'][ $key ];
@@ -3417,7 +3417,7 @@ function rest_convert_error_to_response( $error ) {
 	$status = array_reduce(
 		$error->get_all_error_data(),
 		static function ( $status, $error_data ) {
-			return is_array( $error_data ) && isset( $error_data['status'] ) ? $error_data['status'] : $status;
+			return $error_data['status'] ?? $status;
 		},
 		500
 	);

wp-includes/rest-api/class-wp-rest-server.php

@@ -1374,7 +1374,7 @@ class WP_REST_Server {
 
 		$response = new WP_REST_Response( $available );
 
-		$fields = isset( $request['_fields'] ) ? $request['_fields'] : '';
+		$fields = $request['_fields'] ?? '';
 		$fields = wp_parse_list( $fields );
 		if ( empty( $fields ) ) {
 			$fields[] = '_links';
@@ -1618,7 +1618,7 @@ class WP_REST_Server {
 				$data['namespace'] = $options['namespace'];
 			}
 
-			$allow_batch = isset( $options['allow_batch'] ) ? $options['allow_batch'] : false;
+			$allow_batch = $options['allow_batch'] ?? false;
 
 			if ( isset( $options['schema'] ) && 'help' === $context ) {
 				$data['schema'] = call_user_func( $options['schema'] );
@@ -1640,7 +1640,7 @@ class WP_REST_Server {
 				'methods' => array_keys( $callback['methods'] ),
 			);
 
-			$callback_batch = isset( $callback['allow_batch'] ) ? $callback['allow_batch'] : $allow_batch;
+			$callback_batch = $callback['allow_batch'] ?? $allow_batch;
 
 			if ( $callback_batch ) {
 				$endpoint_data['allow_batch'] = $callback_batch;
@@ -1722,7 +1722,7 @@ class WP_REST_Server {
 				continue;
 			}
 
-			$single_request = new WP_REST_Request( isset( $args['method'] ) ? $args['method'] : 'POST', $parsed_url['path'] );
+			$single_request = new WP_REST_Request( $args['method'] ?? 'POST', $parsed_url['path'] );
 
 			if ( ! empty( $parsed_url['query'] ) ) {
 				$query_args = array();
@@ -1767,7 +1767,7 @@ class WP_REST_Server {
 					$allow_batch = $handler['allow_batch'];
 				} else {
 					$route_options = $this->get_route_options( $route );
-					$allow_batch   = isset( $route_options['allow_batch'] ) ? $route_options['allow_batch'] : false;
+					$allow_batch   = $route_options['allow_batch'] ?? false;
 				}
 
 				if ( ! is_array( $allow_batch ) || empty( $allow_batch['v1'] ) ) {

wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php

@@ -159,7 +159,7 @@ class WP_REST_Attachments_Controller extends WP_REST_Posts_Controller {
 		 * @param bool        $check_mime Whether to prevent uploads of unsupported image types.
 		 * @param string|null $mime_type  The mime type of the file being uploaded (if available).
 		 */
-		$prevent_unsupported_uploads = apply_filters( 'wp_prevent_unsupported_mime_type_uploads', true, isset( $files['file']['type'] ) ? $files['file']['type'] : null );
+		$prevent_unsupported_uploads = apply_filters( 'wp_prevent_unsupported_mime_type_uploads', true, $files['file']['type'] ?? null );
 
 		// If the upload is an image, check if the server can handle the mime type.
 		if (

wp-includes/rest-api/endpoints/class-wp-rest-autosaves-controller.php

@@ -389,7 +389,7 @@ class WP_REST_Autosaves_Controller extends WP_REST_Revisions_Controller {
 			foreach ( $revisioned_meta_keys as $meta_key ) {
 				// get_metadata_raw is used to avoid retrieving the default value.
 				$old_meta = get_metadata_raw( 'post', $post_id, $meta_key, true );
-				$new_meta = isset( $meta[ $meta_key ] ) ? $meta[ $meta_key ] : '';
+				$new_meta = $meta[ $meta_key ] ?? '';
 
 				if ( $new_meta !== $old_meta ) {
 					$autosave_is_different = true;

wp-includes/rest-api/endpoints/class-wp-rest-block-directory-controller.php

@@ -136,7 +136,7 @@ class WP_REST_Block_Directory_Controller extends WP_REST_Controller {
 			'author_block_rating' => $plugin['author_block_rating'] / 20,
 			'author_block_count'  => (int) $plugin['author_block_count'],
 			'author'              => wp_strip_all_tags( $plugin['author'] ),
-			'icon'                => ( isset( $plugin['icons']['1x'] ) ? $plugin['icons']['1x'] : 'block-default' ),
+			'icon'                => $plugin['icons']['1x'] ?? 'block-default',
 			'last_updated'        => gmdate( 'Y-m-d\TH:i:s', strtotime( $plugin['last_updated'] ) ),
 			'humanized_updated'   => sprintf(
 				/* translators: %s: Human-readable time difference. */

wp-includes/rest-api/endpoints/class-wp-rest-blocks-controller.php

@@ -58,7 +58,7 @@ class WP_REST_Blocks_Controller extends WP_REST_Posts_Controller {
 		unset( $data['content']['rendered'] );
 
 		// Add the core wp_pattern_sync_status meta as top level property to the response.
-		$data['wp_pattern_sync_status'] = isset( $data['meta']['wp_pattern_sync_status'] ) ? $data['meta']['wp_pattern_sync_status'] : '';
+		$data['wp_pattern_sync_status'] = $data['meta']['wp_pattern_sync_status'] ?? '';
 		unset( $data['meta']['wp_pattern_sync_status'] );
 		return $data;
 	}

wp-includes/rest-api/endpoints/class-wp-rest-controller.php

@@ -571,7 +571,7 @@ abstract class WP_REST_Controller {
 	 */
 	public function get_fields_for_response( $request ) {
 		$schema     = $this->get_item_schema();
-		$properties = isset( $schema['properties'] ) ? $schema['properties'] : array();
+		$properties = $schema['properties'] ?? array();
 
 		$additional_fields = $this->get_additional_fields();
 

wp-includes/rest-api/endpoints/class-wp-rest-global-styles-controller.php

@@ -573,7 +573,7 @@ class WP_REST_Global_Styles_Controller extends WP_REST_Posts_Controller {
 
 		if ( rest_is_field_included( 'styles', $fields ) ) {
 			$raw_data       = $theme->get_raw_data();
-			$data['styles'] = isset( $raw_data['styles'] ) ? $raw_data['styles'] : array();
+			$data['styles'] = $raw_data['styles'] ?? array();
 		}
 
 		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';

wp-includes/rest-api/endpoints/class-wp-rest-menu-locations-controller.php

@@ -181,7 +181,7 @@ class WP_REST_Menu_Locations_Controller extends WP_REST_Controller {
 		$location = $item;
 
 		$locations = get_nav_menu_locations();
-		$menu      = isset( $locations[ $location->name ] ) ? $locations[ $location->name ] : 0;
+		$menu      = $locations[ $location->name ] ?? 0;
 
 		$fields = $this->get_fields_for_response( $request );
 		$data   = array();
@@ -242,7 +242,7 @@ class WP_REST_Menu_Locations_Controller extends WP_REST_Controller {
 		);
 
 		$locations = get_nav_menu_locations();
-		$menu      = isset( $locations[ $location->name ] ) ? $locations[ $location->name ] : 0;
+		$menu      = $locations[ $location->name ] ?? 0;
 		if ( $menu ) {
 			$path = rest_get_route_for_term( $menu );
 			if ( $path ) {

wp-includes/rest-api/endpoints/class-wp-rest-pattern-directory-controller.php

@@ -100,8 +100,8 @@ class WP_REST_Pattern_Directory_Controller extends WP_REST_Controller {
 
 		$query_args['locale']             = get_user_locale();
 		$query_args['wp-version']         = wp_get_wp_version();
-		$query_args['pattern-categories'] = isset( $request['category'] ) ? $request['category'] : false;
-		$query_args['pattern-keywords']   = isset( $request['keyword'] ) ? $request['keyword'] : false;
+		$query_args['pattern-categories'] = $request['category'] ?? false;
+		$query_args['pattern-keywords']   = $request['keyword'] ?? false;
 
 		$query_args = array_filter( $query_args );
 

wp-includes/rest-api/endpoints/class-wp-rest-settings-controller.php

@@ -239,7 +239,7 @@ class WP_REST_Settings_Controller extends WP_REST_Controller {
 				'type'        => empty( $args['type'] ) ? null : $args['type'],
 				'title'       => empty( $args['label'] ) ? '' : $args['label'],
 				'description' => empty( $args['description'] ) ? '' : $args['description'],
-				'default'     => isset( $args['default'] ) ? $args['default'] : null,
+				'default'     => $args['default'] ?? null,
 			);
 
 			$rest_args['schema']      = array_merge( $default_schema, $rest_args['schema'] );

wp-includes/rest-api/endpoints/class-wp-rest-sidebars-controller.php

@@ -339,13 +339,13 @@ class WP_REST_Sidebars_Controller extends WP_REST_Controller {
 			$registered_sidebar = $wp_registered_sidebars[ $id ];
 
 			$sidebar['status']        = 'active';
-			$sidebar['name']          = isset( $registered_sidebar['name'] ) ? $registered_sidebar['name'] : '';
+			$sidebar['name']          = $registered_sidebar['name'] ?? '';
 			$sidebar['description']   = isset( $registered_sidebar['description'] ) ? wp_sidebar_description( $id ) : '';
-			$sidebar['class']         = isset( $registered_sidebar['class'] ) ? $registered_sidebar['class'] : '';
-			$sidebar['before_widget'] = isset( $registered_sidebar['before_widget'] ) ? $registered_sidebar['before_widget'] : '';
-			$sidebar['after_widget']  = isset( $registered_sidebar['after_widget'] ) ? $registered_sidebar['after_widget'] : '';
-			$sidebar['before_title']  = isset( $registered_sidebar['before_title'] ) ? $registered_sidebar['before_title'] : '';
-			$sidebar['after_title']   = isset( $registered_sidebar['after_title'] ) ? $registered_sidebar['after_title'] : '';
+			$sidebar['class']         = $registered_sidebar['class'] ?? '';
+			$sidebar['before_widget'] = $registered_sidebar['before_widget'] ?? '';
+			$sidebar['after_widget']  = $registered_sidebar['after_widget'] ?? '';
+			$sidebar['before_title']  = $registered_sidebar['before_title'] ?? '';
+			$sidebar['after_title']   = $registered_sidebar['after_title'] ?? '';
 		} else {
 			$sidebar['status']      = 'inactive';
 			$sidebar['name']        = $raw_sidebar['name'];
@@ -361,7 +361,7 @@ class WP_REST_Sidebars_Controller extends WP_REST_Controller {
 		if ( rest_is_field_included( 'widgets', $fields ) ) {
 			$sidebars = wp_get_sidebars_widgets();
 			$widgets  = array_filter(
-				isset( $sidebars[ $sidebar['id'] ] ) ? $sidebars[ $sidebar['id'] ] : array(),
+				$sidebars[ $sidebar['id'] ] ?? array(),
 				static function ( $widget_id ) use ( $wp_registered_widgets ) {
 					return isset( $wp_registered_widgets[ $widget_id ] );
 				}

wp-includes/rest-api/endpoints/class-wp-rest-templates-controller.php

@@ -579,7 +579,7 @@ class WP_REST_Templates_Controller extends WP_REST_Controller {
 			$changes->post_type   = $this->post_type;
 			$changes->post_status = 'publish';
 			$changes->tax_input   = array(
-				'wp_theme' => isset( $request['theme'] ) ? $request['theme'] : get_stylesheet(),
+				'wp_theme' => $request['theme'] ?? get_stylesheet(),
 			);
 		} elseif ( 'custom' !== $template->source ) {
 			$changes->post_name   = $template->slug;
@@ -914,8 +914,7 @@ class WP_REST_Templates_Controller extends WP_REST_Controller {
 				if ( isset( $plugins[ $plugin_basename ] ) && isset( $plugins[ $plugin_basename ]['Name'] ) ) {
 					return $plugins[ $plugin_basename ]['Name'];
 				}
-				return isset( $template_object->plugin ) ?
-					$template_object->plugin :
+				return $template_object->plugin ??
 					$template_object->theme;
 			case 'site':
 				return get_bloginfo( 'name' );

wp-includes/rest-api/endpoints/class-wp-rest-themes-controller.php

@@ -405,7 +405,7 @@ class WP_REST_Themes_Controller extends WP_REST_Controller {
 			$id = WP_Theme_JSON_Resolver::get_user_global_styles_post_id();
 		} else {
 			$user_cpt = WP_Theme_JSON_Resolver::get_user_data_from_wp_global_styles( $theme );
-			$id       = isset( $user_cpt['ID'] ) ? $user_cpt['ID'] : null;
+			$id       = $user_cpt['ID'] ?? null;
 		}
 
 		if ( $id ) {

wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php

@@ -333,9 +333,7 @@ class WP_REST_Users_Controller extends WP_REST_Controller {
 				$prepared_args['search_columns'] = array( 'ID', 'user_login', 'user_nicename', 'display_name' );
 			}
 			$search_columns         = $request->get_param( 'search_columns' );
-			$valid_columns          = isset( $prepared_args['search_columns'] )
-				? $prepared_args['search_columns']
-				: array( 'ID', 'user_login', 'user_nicename', 'user_email', 'display_name' );
+			$valid_columns          = $prepared_args['search_columns'] ?? array( 'ID', 'user_login', 'user_nicename', 'user_email', 'display_name' );
 			$search_columns_mapping = array(
 				'id'       => 'ID',
 				'username' => 'user_login',

wp-includes/rest-api/endpoints/class-wp-rest-widget-types-controller.php

@@ -611,7 +611,7 @@ class WP_REST_Widget_Types_Controller extends WP_REST_Controller {
 		return array(
 			'preview' => $this->render_legacy_widget_preview_iframe(
 				$request['id'],
-				isset( $request['instance'] ) ? $request['instance'] : null
+				$request['instance'] ?? null
 			),
 		);
 	}

wp-includes/rest-api/endpoints/class-wp-rest-widgets-controller.php

@@ -533,7 +533,7 @@ class WP_REST_Widgets_Controller extends WP_REST_Controller {
 			$id            = $request['id'];
 			$parsed_id     = wp_parse_widget_id( $id );
 			$id_base       = $parsed_id['id_base'];
-			$number        = isset( $parsed_id['number'] ) ? $parsed_id['number'] : null;
+			$number        = $parsed_id['number'] ?? null;
 			$widget_object = $wp_widget_factory->get_widget_object( $id_base );
 			$creating      = false;
 		} elseif ( $request['id_base'] ) {

wp-includes/rest-api/fields/class-wp-rest-meta-fields.php

@@ -480,7 +480,7 @@ abstract class WP_REST_Meta_Fields {
 				'type'        => $default_args['type'],
 				'title'       => empty( $args['label'] ) ? '' : $args['label'],
 				'description' => empty( $args['description'] ) ? '' : $args['description'],
-				'default'     => isset( $args['default'] ) ? $args['default'] : null,
+				'default'     => $args['default'] ?? null,
 			);
 
 			$rest_args           = array_merge( $default_args, $rest_args );

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '7.0-alpha-61428';
+$wp_version = '7.0-alpha-61429';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.