WP_REST_Server::match_request_to_handler( WP_REST_Request $request ): array|WP_Error

1158	protected function match_request_to_handler( $request ) {1159		$method = $request->get_method();1160		$path   = $request->get_route();1161 1162		$with_namespace = array();1163 1164		foreach ( $this->get_namespaces() as $namespace ) {1165			if ( str_starts_with( trailingslashit( ltrim( $path, '/' ) ), $namespace ) ) {1166				$with_namespace[] = $this->get_routes( $namespace );1167			}1168		}1169 1170		if ( $with_namespace ) {1171			$routes = array_merge( ...$with_namespace );1172		} else {1173			$routes = $this->get_routes();1174		}1175 1176		foreach ( $routes as $route => $handlers ) {1177			$match = preg_match( '@^' . $route . '$@i', $path, $matches );1178 1179			if ( ! $match ) {1180				continue;1181			}1182 1183			$args = array();1184 1185			foreach ( $matches as $param => $value ) {1186				if ( ! is_int( $param ) ) {1187					$args[ $param ] = $value;1188				}1189			}1190 1191			foreach ( $handlers as $handler ) {1192				$callback = $handler['callback'];1193 1194				// Fallback to GET method if no HEAD method is registered.1195				$checked_method = $method;1196				if ( 'HEAD' === $method && empty( $handler['methods']['HEAD'] ) ) {1197					$checked_method = 'GET';1198				}1199				if ( empty( $handler['methods'][ $checked_method ] ) ) {1200					continue;1201				}1202 1203				if ( ! is_callable( $callback ) ) {1204					return array( $route, $handler );1205				}1206 1207				$request->set_url_params( $args );1208				$request->set_attributes( $handler );1209 1210				$defaults = array();1211 1212				foreach ( $handler['args'] as $arg => $options ) {1213					if ( isset( $options['default'] ) ) {1214						$defaults[ $arg ] = $options['default'];1215					}1216				}1217 1218				$request->set_default_params( $defaults );1219 1220				return array( $route, $handler );1221			}1222		}1223 1224		return new WP_Error(1225			'rest_no_route',1226			__( 'No route was found matching the URL and request method.' ),1227			array( 'status' => 404 )1228		);1229	}