ChecksumValidation Class Reference

Public Attributes
const	default = 0
const	ON = 1
const	OFF = 2

Detailed Description

Enable checksum validation during recognition for 1D barcodes. Default is treated as Yes for symbologies which must contain checksum, as No where checksum only possible. Checksum never used: Codabar Checksum is possible: Code39 Standard/Extended, Standard2of5, Interleaved2of5, Matrix2of5, ItalianPost25, DeutschePostIdentcode, DeutschePostLeitcode, VIN Checksum always used: Rest symbologies This sample shows influence of ChecksumValidation on recognition quality and results $generator = new BarcodeGenerator(EncodeTypes::EAN_13, "1234567890128"); $generator->save("test.png"); $reader = new BarCodeReader("test.png", DecodeType::EAN_13); //checksum disabled $reader.setChecksumValidation(ChecksumValidation::OFF); foreach($reader->readBarCodes() as $result) { print("BarCode CodeText: ".$result->getCodeText()); print("BarCode Value: ".$result->getExtended()->getOneD()->getValue()); print("BarCode Checksum: ".$result->getExtended()->getOneD()->getCheckSum()); } $reader = new BarCodeReader("test.png", DecodeType::EAN_13); //checksum enabled $reader->setChecksumValidation(ChecksumValidation::ON); foreach($reader->readBarCodes() as $result) { print("BarCode CodeText: ".$result->getCodeText()); print("BarCode Value: ".$result->getExtended()->getOneD()->getValue()); print("BarCode Checksum: ".$result->getExtended()->getOneD()->getCheckSum()); }

Member Data Documentation

default

const default = 0

If checksum is required by the specification - it will be validated.

OFF

const OFF = 2

Do not validate checksum.

ON

const ON = 1

Always validate checksum if possible.