Online PHP editor | output for q1CvF

@ 2023-10-24T20:44:22Z

<?php

define('WEIGHTS', [7, 3, 1]);
define('WEIGHTS_COUNT', count(WEIGHTS));

$customerNumber = 1;
$invoiceNumber = 25;

echo ($refBase = sprintf('%d%04d', $customerNumber, $invoiceNumber))
     . $verificationDigit = (
         fn($weightedSum) => (ceil($weightedSum / 10) * 10 - $weightedSum)
       )(array_reduce(
             str_split(strrev($refBase)),
             function($result, $v) {
                 static $i;
                 $i ??= 0;
                 return $result + ($v * WEIGHTS[$i++ % WEIGHTS_COUNT]);
             },   
             0
          )
       );

Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0 - 8.5.1: 100256
Output for 8.4.15: /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.

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