/usr/share/php/smarty3/plugins/validatecriteria.isccnum.php is in smarty-validate 3.0.3-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/**
* Project: SmartyValidate: Form Validator for the Smarty Template Engine
* File: validate_criteria.isCCNum.php
* Author: Monte Ohrt <monte at newdigitalgroup dot com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* @link http://www.phpinsider.com/php/code/SmartyValidate/
* @copyright 2001-2005 New Digital Group, Inc.
* @author Monte Ohrt <monte at newdigitalgroup dot com>
* @package SmartyValidate
*/
/**
* test if a value is a valid credit card checksum
*
* @param string $value the value being tested
* @param boolean $empty if field can be empty
* @param array params validate parameter values
* @param array formvars form var values
*/
function smarty_validate_criteria_isCCNum($value, $empty, &$params, &$formvars) {
if(strlen($value) == 0)
return $empty;
// strip everything but digits
$value = preg_replace('!\D+!', '', $value);
if (empty($value))
return false;
$_c_digits = preg_split('//', $value, -1, PREG_SPLIT_NO_EMPTY);
$_max_digit = count($_c_digits)-1;
$_even_odd = $_max_digit % 2;
$_sum = 0;
for ($_count=0; $_count <= $_max_digit; $_count++) {
$_digit = $_c_digits[$_count];
if ($_even_odd) {
$_digit = $_digit * 2;
if ($_digit > 9) {
$_digit = substr($_digit, 1, 1) + 1;
}
}
$_even_odd = 1 - $_even_odd;
$_sum += $_digit;
}
$_sum = $_sum % 10;
if($_sum)
return false;
return true;
}
?>
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