Weryfikacja numeru REGON

regon.php

<?php
function check_regon_number ($number)
{
	$w = array(7 => array(2, 3, 4, 5, 6, 7), 9 => array(8, 9, 2, 3, 4, 5, 6, 7), 14 => array(2, 4, 8, 5, 0, 9, 7, 3, 6, 1, 2, 4, 8));
	if (!isset($w[$l = strlen($number = preg_replace('/[^0-9]/', '', $number))])) return false;
	for ($s = $i = 0; $i < $l - 1; $i ++)
		$s += $number[$i] * $w[$l][$i];
	return $number[$l - 1] == (($s % 11) % 10);
}