use PBurggraf\LicensePlate\LicensePlateFactory;
use PBurggraf\LicensePlate\Detector\GermanyDetector;
use PBurggraf\LicensePlate\Detector\NetherlandsDetector;

// Procedural style
$procedural = LicensePlateFactory::fromString($plate, [
    GermanyDetector::class,
    NetherlandsDetector::class,
]);

// Object orientated
$licensePlate = new LicensePlateFactory($plate);
$licensePlate->addDetectorType(GermanyDetector::class);
$licensePlate->addDetectorType(NetherlandsDetector::class);
$objectOrientated = $licensePlate->getResults();

Test

This project uses phpunit to test the validation of license plates.