public static function appendVerhoeff($n, $c)
{
for (; $c > 0; $c--) {
$n .= Verhoeff::get($n);
}
return $n;
}
public static function appendVerhoeff($n, $c)
{
for (; $c > 0; $c--) {
$n .= Verhoeff::get($n);
}
return $n;
}