<?php
class Luhn {
public static function getDigit($number) {
$number .= 0;
$result = self::check($number);
echo $result;
return (10 - $result);
}
public static function check($number) {
$sum = 0;
$numDigits = strlen($number) - 1;
$parity = $numDigits % 2;
for ($i = $numDigits; $i >= 0; $i--) {
$digit = substr($number, $i, 1);
if (!$parity == ($i % 2)) {$digit <<= 1;}
$digit = ($digit > 9) ? ($digit - 9) : $digit;
$sum += $digit;
}
return (0 == ($sum % 10));
}
}
$checkd = Luhn::getDigit(1234567891234567891);
echo $checkd;
var_dump(Luhn::check("1234567891234567891" . $checkd));
- Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
- 10bool(false)
preferences:
254.35 ms | 404 KiB | 330 Q