<?php/** Copyright 2007 ZXing authors** Licensed under the Apache License, Version 2.0 (the "License");* you may not use this file except in compliance with the License.* You may obtain a copy of the License at** http://www.apache.org/licenses/LICENSE-2.0** Unless required by applicable law or agreed to in writing, software* distributed under the License is distributed on an "AS IS" BASIS,* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.* See the License for the specific language governing permissions and* limitations under the License.*/namespaceZxing;/** * Thrown when a barcode was not found in the image. It might have been * partially detected but could not be confirmed. * * @author Sean Owen */finalclassNotFoundExceptionextendsReaderException{privatestatic$instance;publicstaticfunctiongetNotFoundInstance(){if(!self::$instance){self::$instance=newNotFoundException();}returnself::$instance;}}