شناسه ملی شرکت

company-code-IR.php

<?php 

// @REF: https://github.com/DevRoomOrg/ircheck/issues/1#issuecomment-348672401
// @REF: http://www.aliarash.com/article/shenasameli/shenasa_meli.htm
function checkNationalCode($nationalCode) {
	if (strlen($nationalCode) != 11)
		return false;

	$c = intval(substr($nationalCode, 10, 1));

	$dahganPlusTwo = intval(substr($nationalCode, 9, 1)) + 2;

	$n= (intval(substr($nationalCode, 0, 1)) + $dahganPlusTwo) * 29 +
		(intval(substr($nationalCode, 1, 1)) + $dahganPlusTwo) * 27 +
		(intval(substr($nationalCode, 2, 1)) + $dahganPlusTwo) * 23 +
		(intval(substr($nationalCode, 3, 1)) + $dahganPlusTwo) * 19 +
		(intval(substr($nationalCode, 4, 1)) + $dahganPlusTwo) * 17 +
		(intval(substr($nationalCode, 5, 1)) + $dahganPlusTwo) * 29 +
		(intval(substr($nationalCode, 6, 1)) + $dahganPlusTwo) * 27 +
		(intval(substr($nationalCode, 7, 1)) + $dahganPlusTwo) * 23 +
		(intval(substr($nationalCode, 8, 1)) + $dahganPlusTwo) * 19 +
		(intval(substr($nationalCode, 9, 1)) + $dahganPlusTwo) * 17;

	$r = $n - intval($n / 11) * 11;

	if($r == 10) $r = 0;

	return $r == $c;
}