%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
/*
Copyright (c) InterAKT Online 2000-2005
*/
/**
Class definition
NAME:
formValidator
DESCRIPTION:
This Class is a simple validator class that incapsulate the UniVal functionality
**/
//TODO : better error triggering
class tNG_FormValidation {
var $tNG = null;
var $columns = array();
var $validationRules = array();
var $genericValidationMessages = array();
var $mustValidate = false;
// constructor
function tNG_FormValidation() {
$this->tNG = null;
$this->validationRules = array();
$this->loadValidatioRules($this->validationRules);
$this->loadGenericValidationMessages($this->genericValidationMessages);
KT_getInternalTimeFormat();
}
function setTransaction(&$tNG) {
$this->tNG = &$tNG;
$this->mustValidate = true;
}
function addField($fieldName, $required, $validationType, $format, $min, $max, $errorMessage) {
$validationType = strtolower($validationType);
$field = array();
$field['name'] = $fieldName;
$field['required'] = $required;
$field['type'] = $validationType;
if ($validationType == 'mask') {
$field['format'] = '';
$field['additional_params'] = $format;
} elseif ($validationType == 'regexp') {
$field['format'] = '';
if (substr($format, 0, 1) != '/') {
$format = '/' . $format . '/im';
}
$field['additional_params'] = $format;
} else {
$field['format'] = strtolower($format);
if (isset ($this->validationRules[$validationType][$format]['regexp'])) {
$additionals = $this->validationRules[$validationType][$format]['regexp'];
} else {
$additionals = '';
}
$field['additional_params'] = $additionals;
}
switch ($field['format']) {
case 'date' :
$field['additional_params'] = $GLOBALS['KT_screen_date_format'];
$field['date_screen_format'] = $GLOBALS['KT_screen_date_format'];
break;
case 'time' :
$field['additional_params'] = $GLOBALS['KT_screen_time_format_internal'];
$field['date_screen_format'] = $GLOBALS['KT_screen_time_format'];
break;
case 'datetime' :
$field['additional_params'] = $GLOBALS['KT_screen_date_format'] . ' ' . $GLOBALS['KT_screen_time_format_internal'];
$field['date_screen_format'] = $GLOBALS['KT_screen_date_format'] . ' ' . $GLOBALS['KT_screen_time_format'];
break;
}
$min1 = $min;
$max1 = $max;
$min1_placeholders = KT_getReplacementsFromMessage($min1);
if (count($min1_placeholders) > 0) {
$min1 = '';
}
$max1_placeholders = KT_getReplacementsFromMessage($max1);
if (count($max1_placeholders) > 0) {
$max1 = '';
}
// min_cs and max_cs are used for client side validation
$field['min_cs'] = $min1;
$field['max_cs'] = $max1;
$min = KT_DynamicData($min, null);
$max = KT_DynamicData($max, null);
$field['min'] = $min;
$field['max'] = $max;
$field['message'] = $errorMessage;
$field['additional_params'] = $field['additional_params'];
$this->columns[$fieldName] = $field;
}
function mask2regexp($txt) {
$txt = preg_replace('/([-\/\[\]()\*\+])/', "\\1", $txt);
$txt = preg_quote($txt);
$txt = str_replace('\?', '?', $txt);
$txt = str_replace('?', '.', $txt);
$txt = str_replace('9', '\d', $txt);
$txt = str_replace('X', '\w', $txt);
$txt = str_replace('A', '[A-Za-z]', $txt);
$txt = str_replace('/', '\/', $txt);
$txt = '/^' . $txt . '$/';
return $txt;
}
function loadValidatioRules(&$arr) {
$arr['text'] = array();
$arr['text'][''] = array();
$arr['text']['email']['regexp'] = '/^[^\s]+@[^\s]+\.[^\s]+$/i';
$arr['text']['cc_generic']['regexp'] = '/^[3-6]{1}[0-9]{12,15}$/';
$arr['text']['cc_generic']['callback'] = 'validate_cc';
$arr['text']['cc_visa']['regexp'] = '/^4[0-9]{12,15}$/';
$arr['text']['cc_visa']['callback'] = 'validate_cc';
$arr['text']['cc_mastercard']['regexp'] = '/^5[1-5]{1}[0-9]{14}$/';
$arr['text']['cc_mastercard']['callback'] = 'validate_cc';
$arr['text']['cc_americanexpress']['regexp'] = '/^3(4|7){1}[0-9]{13}$/';
$arr['text']['cc_americanexpress']['callback'] = 'validate_cc';
$arr['text']['cc_discover']['regexp'] = '/^6011[0-9]{12}$/';
$arr['text']['cc_discover']['callback'] = 'validate_cc';
$arr['text']['cc_dinersclub']['regexp'] = '/^3((0[0-5]{1}[0-9]{11})|(6[0-9]{12})|(8[0-9]{12}))$/';
$arr['text']['cc_dinersclub']['callback'] = 'validate_cc';
$arr['text']['zip_generic']['regexp'] = '/^\d+$/';
$arr['text']['zip_us5']['regexp'] = '/^\d{5}$/';
$arr['text']['zip_us9']['regexp'] = '/^\d{5}-\d{4}$/';
$arr['text']['zip_canada']['regexp'] = '/^[A-Z]{1}\d[A-Z]{1}\s?\d[A-Z]{1}\d$/i';
$arr['text']['zip_uk']['regexp'] = '/^[A-Z]{1,2}\d[\dA-Z]?\s?\d[A-Z]{2}$/i';
$arr['text']['phone']['regexp'] = '/^[(]?[+]{0,2}[0-9-.\s\/()]+$/';
$arr['text']['ssn']['regexp'] = '/^\d{3}\s?\d{2}\s?\d{4}$/';
$arr["text"]['url']['regexp'] = '/^http(s)?:\/\/([0-9a-z-_]+\.)+[a-z]{2,4}(\/|\\\\)?.*$/i';
$arr['text']['ip']['regexp'] = '/^\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3}$/';
$arr['text']['ip']['callback'] = 'validate_ip';
$arr['text']['color_generic']['callback'] = 'validate_color';
$arr['text']['color_hex']['regexp'] = '/^#[0-9a-f]{6}$/i';
$arr['numeric'] = array();
$arr['numeric'][''] = array();
$arr['numeric']['int']['regexp'] = '/^-?\d+$/';
$arr['numeric']['int_positive']['regexp'] = '/^\d+$/';
$arr['numeric']['int_positive']['callback'] = 'validate_positive';
$arr['numeric']['zip_generic']['regexp'] = '/^\d+$/';
$arr['double']['float']['regexp'] = '/^-?[0-9]*(\.|,)?[0-9]+([eE]\-[0-9]+)?$/';
$arr['double']['float_positive']['regexp'] = '/^[0-9]*(\.|,)?[0-9]+([eE]\-[0-9]+)?$/';
$arr['double']['float_positive']['callback'] = 'validate_positive';
$arr['date'] = array();
$arr['date']['date'] = array();
$arr['date']['datetime'] = array();
$arr['date']['time'] = array();
$arr['mask'] = array();
$arr['regexp'] = array();
}
function loadGenericValidationMessages(&$arr) {
$d = 'tNG_FormValidation';
$arr["failed"] = KT_getResource('FAILED', $d);
$arr["required"] = KT_getResource('REQUIRED', $d);
$arr["type"] = KT_getResource('TYPE', $d);
$arr["format"] = KT_getResource('FORMAT', $d);
$arr["text_"] = KT_getResource('TEXT_', $d);
$arr["text_email"] = KT_getResource('TEXT_EMAIL', $d);
$arr["text_cc_generic"] = KT_getResource('TEXT_CC_GENERIC', $d);
$arr["text_cc_visa"] = KT_getResource('TEXT_CC_VISA', $d);
$arr["text_cc_mastercard"] = KT_getResource('TEXT_CC_MASTERCARD', $d);
$arr["text_cc_americanexpress"] = KT_getResource('TEXT_CC_AMERICANEXPRESS', $d);
$arr["text_cc_discover"] = KT_getResource('TEXT_CC_DISCOVER', $d);
$arr["text_cc_dinersclub"] = KT_getResource('TEXT_CC_DINERSCLUB', $d);
$arr["text_zip_generic"] = KT_getResource('TEXT_ZIP_GENERIC', $d);
$arr["text_zip_us5"] = KT_getResource('TEXT_ZIP_US5', $d);
$arr["text_zip_us9"] = KT_getResource('TEXT_ZIP_US9', $d);
$arr["text_zip_canada"] = KT_getResource('TEXT_ZIP_CANADA', $d);
$arr["text_zip_uk"] = KT_getResource('TEXT_ZIP_UK', $d);
$arr["text_phone"] = KT_getResource('TEXT_PHONE', $d);
$arr["text_ssn"] = KT_getResource('TEXT_SSN', $d);
$arr["text_url"] = KT_getResource('TEXT_URL', $d);
$arr["text_ip"] = KT_getResource('TEXT_IP', $d);
$arr["text_color_hex"] = KT_getResource('TEXT_COLOR_HEX', $d);
$arr["text_color_generic"] = KT_getResource('TEXT_COLOR_GENERIC', $d);
$arr["numeric_"] = KT_getResource('NUMERIC_', $d);
$arr["numeric_int"] = KT_getResource('NUMERIC_INT', $d);
$arr["numeric_int_positive"] = KT_getResource('NUMERIC_INT_POSITIVE', $d);
$arr["numeric_zip_generic"] = KT_getResource('TEXT_ZIP_GENERIC', $d);
$arr["double_"] = KT_getResource('DOUBLE_', $d);
$arr["double_float"] = KT_getResource('DOUBLE_FLOAT', $d);
$arr["double_float_positive"] = KT_getResource('DOUBLE_FLOAT_POSITIVE', $d);
$arr["date_"] = KT_getResource('DATE_', $d);
$arr["date_date"] = KT_getResource('DATE_DATE', $d);
$arr["date_time"] = KT_getResource('DATE_TIME', $d);
$arr["date_datetime"] = KT_getResource('DATE_DATETIME', $d);
$arr["mask_"] = KT_getResource('MASK_', $d);
$arr["regexp_"] = KT_getResource('REGEXP_', $d);
$arr["regexp_failed"] = KT_getResource('REGEXP_FAILED', $d);
$arr["text_min"] = KT_getResource('TEXT_MIN', $d);
$arr["text_max"] = KT_getResource('TEXT_MAX', $d);
$arr["text_between"] = KT_getResource('TEXT_BETWEEN', $d);
$arr["other_min"] = KT_getResource('OTHER_MIN', $d);
$arr["other_max"] = KT_getResource('OTHER_MAX', $d);
$arr["other_between"] = KT_getResource('OTHER_BETWEEN', $d);
}
/**
NAME:
Execute
DESCRIPTION:
validates the columnsValue based on regExp and required information
ARGUMENTS:
none -
property used:
$columns
$columnsValue
RETURN:
string - empty on succes , an error message if fails
property changed:
- none
**/
function Execute() {
$failed = false;
$errObj = new tNG_error('', array(), array());
if ($this->mustValidate && count($this->columns) > 0) {
$columnKeys = array_keys($this->columns);
$cols = count($columnKeys);
for ($i = 0; $i < $cols; $i++) {
$doRequiredVal = true;
$colIdx = $columnKeys[$i];
$column = &$this->columns[$colIdx];
if ( !in_array($column['name'], array_keys($this->tNG->columns)) ) {
continue;
}
// on update don't require FILE_TYPE and tNG password fields
if ($this->tNG->getTransactionType() == '_update' || $this->tNG->getTransactionType() == '_multipleUpdate') {
if ($this->tNG->getColumnType($column['name']) == 'FILE_TYPE') {
$doRequiredVal = false;
}
if ($this->tNG->getTable() == $GLOBALS['tNG_login_config']["table"] && $column['name'] == $GLOBALS['tNG_login_config']["password_field"]) {
$doRequiredVal = false;
}
}
$hasRequiredError = false;
$hasTypeError = false;
$tmpFieldValue = $this->tNG->getColumnValue($column['name']);
if ($column['type'] == 'date' && $column['format'] != '') {
if ( !in_array($this->tNG->getColumnType($column['name']), array('DATE_TYPE', 'DATE_ACCESS_TYPE')) ) {
$tmpFieldValue = KT_formatDate2DB($tmpFieldValue);
}
}
$column['failed'] = false;
// required parameter validation
$colCustomMsg = $column['message'];
if ($doRequiredVal && $column['required']) {
if (strlen($colCustomMsg) == 0) {
$colCustomMsg = $this->genericValidationMessages['required'];
}
if ((string)($tmpFieldValue) == '') {
$failed = true;
$hasRequiredError = true;
$column['failed'] = true;
if ($this->tNG->exportsRecordset() !== true) {
$colCustomMsg = KT_DynamicData($colCustomMsg, $this->tNG, '', ($this->tNG->transactionType == '_delete'));
$errObj->addDetails('%s', array($colCustomMsg), array($colCustomMsg));
} else {
$errObj->setFieldError($column['name'], '%s', array($colCustomMsg));
}
}
}
// type and format validation
$colCustomMsg = $column['message'];
if ($tmpFieldValue != '' && $column['type'] != '') {
if (strlen($colCustomMsg) == 0) {
$colCustomMsgBefore = $this->genericValidationMessages['format'];
$colCustomMsgAfter = $this->genericValidationMessages[$column['type'] . '_' . $column['format']];
$colCustomMsg = sprintf($colCustomMsgBefore, $colCustomMsgAfter);
}
$tmpFieldValue = substr($tmpFieldValue, 0, 400);
switch ($column['type']) {
case 'regexp':
$res = @preg_match($column['additional_params'], $tmpFieldValue);
if ($res === false) {
$hasTypeError = true;
$colCustomMsgBefore = $this->genericValidationMessages['format'];
$colCustomMsgAfter = $this->genericValidationMessages['regexp_failed'];
$colCustomMsg = sprintf($colCustomMsgBefore, $colCustomMsgAfter);
}
if ($res === 0) {
$hasTypeError = true;
}
break;
case 'mask':
$myRegexp = $this->mask2regexp($column['additional_params']);
if (!preg_match($myRegexp, $tmpFieldValue)) {
$hasTypeError = true;
}
break;
case 'text':
case 'numeric':
case 'double':
$type = $column['type'];
$format = $column['format'];
if (is_array($this->validationRules[$type][$format])) {
$myValidationRule = &$this->validationRules[$type][$format];
if (isset($myValidationRule['mask'])) {
$myRegexp = $this->mask2regexp($myValidationRule['mask']);
$myValidationRule['regexp'] = $myRegexp;
}
if (isset($myValidationRule['regexp'])) {
if (!preg_match($myValidationRule['regexp'], $tmpFieldValue)) {
$hasTypeError = true;
}
}
if (isset($myValidationRule['callback'])) {
$ret = call_user_func(array('tNG_FormValidation', $myValidationRule['callback']), $tmpFieldValue);
if (!$ret) {
$hasTypeError = true;
}
}
}
break;
case 'date':
$format = $column['format'];
$checkFullDateTime = true;
switch ($format) {
case 'date':
$inFmtRule = KT_format2rule($GLOBALS['KT_db_date_format']);
$checkFullDateTime = true;
break;
case 'time':
$inFmtRule = KT_format2rule($GLOBALS['KT_db_time_format_internal']);
$checkFullDateTime = false;
break;
case 'datetime':
$inFmtRule = KT_format2rule($GLOBALS['KT_db_date_format'] . ' ' . $GLOBALS['KT_db_time_format_internal']);
$checkFullDateTime = true;
break;
default:
break 2;
}
$dateArr = KT_applyDate2rule($tmpFieldValue, $inFmtRule);
$ret = KT_isValidDate($dateArr, $checkFullDateTime);
if (!$ret) {
$hasTypeError = true;
}
break;
}
}
if (!$hasRequiredError && $hasTypeError) {
$column['failed'] = true;
$failed = true;
if ($this->tNG->exportsRecordset() !== true) {
$colCustomMsg = KT_DynamicData($colCustomMsg, $this->tNG, '', ($this->tNG->transactionType == '_delete'));
$errObj->addDetails('%s', array($colCustomMsg), array($colCustomMsg));
} else {
$errObj->setFieldError($column['name'], '%s', array($colCustomMsg));
}
}
}
for ($i = 0; $i < $cols; $i++) {
$colIdx = $columnKeys[$i];
$column = &$this->columns[$colIdx];
if ( !in_array($column['name'], array_keys($this->tNG->columns)) ) {
continue;
}
$hasMinMaxError = false;
$tmpFieldValue = $this->tNG->getColumnValue($column['name']);
if ($column['type'] == 'date' && $column['format'] != '') {
if ( !in_array($this->tNG->getColumnType($column['name']), array('DATE_TYPE', 'DATE_ACCESS_TYPE')) ) {
$tmpFieldValue = KT_formatDate2DB($tmpFieldValue);
}
}
// MIN MAX parameter validation
$tNG_tNGfield_min = array();
$tNG_tNGfield_max = array();
$min = $column['min'];
$min_placeholders = KT_getReplacementsFromMessage($min);
if (count($min_placeholders) > 0) {
foreach ($min_placeholders as $key => $placeholder) {
if (strpos($placeholder, '.') === false) {
$tNG_tNGfield_min[] = $placeholder;
}
}
}
$max = $column['max'];
$max_placeholders = KT_getReplacementsFromMessage($max);
if (count($max_placeholders) > 0) {
foreach ($max_placeholders as $key => $placeholder) {
if (strpos($placeholder, '.') === false) {
$tNG_tNGfield_max[] = $placeholder;
}
}
}
$min = KT_DynamicData($min, $this->tNG);
$max = KT_DynamicData($max, $this->tNG);
// MIN parameter validation
if ($tmpFieldValue != '' && $min != '') {
if ($column['type'] == 'text') {
if (strlen($tmpFieldValue) < $min) {
$hasMinMaxError = true;
}
}
if (in_array($column['type'], array('numeric', 'double'))) {
$evaluateNumeric = true;
if (count($tNG_tNGfield_min) > 0) {
foreach ($tNG_tNGfield_min as $key => $tNG_tNGfield) {
if (!isset($this->columns[$tNG_tNGfield]) || !in_array($this->columns[$tNG_tNGfield]['type'], array('numeric', 'double'))
|| $this->columns[$tNG_tNGfield]['format'] == '' || $column['failed']) {
$evaluateNumeric = false;
break;
}
}
}
$tmpFieldValue = str_replace(',', '.', $tmpFieldValue);
$min = str_replace(',', '.', $min);
if ($evaluateNumeric) {
$min = $this->tNG->evaluateNumeric($min);
}
if (floatval($tmpFieldValue) < floatval($min)) {
$hasMinMaxError = true;
}
}
if ($column['type'] == 'date') {
if (count($tNG_tNGfield_min) > 0) {
foreach ($tNG_tNGfield_min as $key => $tNG_tNGfield) {
if ( in_array($this->tNG->getColumnType($tNG_tNGfield), array('DATE_TYPE','DATE_ACCESS_TYPE')) ) {
$min = KT_formatDate($min);
break;
}
}
}
$minDate = KT_formatDate2DB($min);
$format = $column['format'];
$checkFullDateTime = true;
switch ($format) {
case 'date':
$inFmtRule = KT_format2rule($GLOBALS['KT_db_date_format']);
$checkFullDateTime = true;
break;
case 'time':
$inFmtRule = KT_format2rule($GLOBALS['KT_db_time_format_internal']);
$checkFullDateTime = false;
break;
case 'datetime':
$inFmtRule = KT_format2rule($GLOBALS['KT_db_date_format'] . ' ' . $GLOBALS['KT_db_time_format_internal']);
$checkFullDateTime = true;
break;
default:
break 2;
}
$dateArr = KT_applyDate2rule($tmpFieldValue, $inFmtRule);
$minArr = KT_applyDate2rule($minDate, $inFmtRule);
if (KT_isValidDate($minArr, $checkFullDateTime)) {
if (KT_compareDates($dateArr, $minArr) === 1) {
$hasMinMaxError = true;
}
}
}
}
// MAX parameter validation
if ($tmpFieldValue != '' && $max != '') {
if ($column['type'] == 'text') {
if (strlen($tmpFieldValue) > $max) {
$hasMinMaxError = true;
}
}
if (in_array($column['type'], array('numeric', 'double'))) {
$evaluateNumeric = true;
if (count($tNG_tNGfield_max) > 0) {
foreach ($tNG_tNGfield_max as $key => $tNG_tNGfield) {
if (!isset($this->columns[$tNG_tNGfield]) || !in_array($this->columns[$tNG_tNGfield]['type'], array('numeric', 'double'))
|| $this->columns[$tNG_tNGfield]['format'] == '' || $column['failed']) {
$evaluateNumeric = false;
break;
}
}
}
$tmpFieldValue = str_replace(',', '.', $tmpFieldValue);
$max = str_replace(',', '.', $max);
if ($evaluateNumeric) {
$max = $this->tNG->evaluateNumeric($max);
}
if (floatval($tmpFieldValue) > floatval($max)) {
$hasMinMaxError = true;
}
}
if ($column['type'] == 'date') {
if (count($tNG_tNGfield_max) > 0) {
foreach ($tNG_tNGfield_max as $key => $tNG_tNGfield) {
if ( in_array($this->tNG->getColumnType($tNG_tNGfield), array('DATE_TYPE','DATE_ACCESS_TYPE')) ) {
$max = KT_formatDate($max);
break;
}
}
}
$maxDate = KT_formatDate2DB($max);
$format = $column['format'];
$checkFullDateTime = true;
switch ($format) {
case 'date':
$inFmtRule = KT_format2rule($GLOBALS['KT_db_date_format']);
$checkFullDateTime = true;
break;
case 'time':
$inFmtRule = KT_format2rule($GLOBALS['KT_db_time_format_internal']);
$checkFullDateTime = false;
break;
case 'datetime':
$inFmtRule = KT_format2rule($GLOBALS['KT_db_date_format'] . ' ' . $GLOBALS['KT_db_time_format_internal']);
$checkFullDateTime = true;
break;
default:
break 2;
}
$dateArr = KT_applyDate2rule($tmpFieldValue, $inFmtRule);
$maxArr = KT_applyDate2rule($maxDate, $inFmtRule);
if (KT_isValidDate($maxArr, $checkFullDateTime)) {
if (KT_compareDates($dateArr, $maxArr) === -1) {
$hasMinMaxError = true;
}
}
}
}
$colCustomMsg = $column['message'];
if (strlen($colCustomMsg) == 0) {
$colCustomMsgBefore = $column['type'] == 'text'?'text':'other';
if ($min != '' && $max != '') {
$colCustomMsgAfter = 'between';
$colCustomMsg = $this->genericValidationMessages[$colCustomMsgBefore . '_' . $colCustomMsgAfter];
$colCustomMsg = sprintf($colCustomMsg, $min, $max);
} elseif ($min != '') {
$colCustomMsgAfter = 'min';
$colCustomMsg = $this->genericValidationMessages[$colCustomMsgBefore . '_' . $colCustomMsgAfter];
$colCustomMsg = sprintf($colCustomMsg, $min);
} else {
$colCustomMsgAfter = 'max';
$colCustomMsg = $this->genericValidationMessages[$colCustomMsgBefore . '_' . $colCustomMsgAfter];
$colCustomMsg = sprintf($colCustomMsg, $max);
}
}
if ($hasMinMaxError && $column['failed'] == false) {
$column['failed'] = true;
$failed = true;
if ($this->tNG->exportsRecordset() !== true) {
$colCustomMsg = KT_DynamicData($colCustomMsg, $this->tNG, '', ($this->tNG->transactionType == '_delete'));
$errObj->addDetails('%s', array($colCustomMsg), array($colCustomMsg));
} else {
$errObj->setFieldError($column['name'], '%s', array($colCustomMsg));
}
}
}
}
if (!$failed) {
$errObj = null;
} else {
if ($this->tNG->exportsRecordset() === true) {
$errObj->addDetails('%s', array($this->genericValidationMessages['failed']), array(''));
}
}
return $errObj;
}
// validation callbacks for special types
function validate_positive($value) {
$value = str_replace(',', '.', $value);
if (floatval($value) >= 0) {
return true;
}
return false;
}
function validate_ip($value) {
$pieces = explode('.', $value);
if (count($pieces) != 4) {
return false;
}
foreach ($pieces as $key => $piece) {
if ($piece > 255) {
return false;
}
}
return true;
}
function validate_color($value) {
$colors = array(
"black",
"green",
"silver",
"lime",
"gray",
"olive",
"white",
"yellow",
"maroon",
"navy",
"red",
"blue",
"purple",
"teal",
"fuchsia",
"aqua"
);
if (!in_array(strtolower($value), $colors)) {
return false;
}
return true;
}
function validate_cc($value) {
$digits = array();
$j = 1;
for ($i = strlen($value) - 1; $i >= 0; $i--) {
if (($j%2) == 0) {
$digit = substr($value, $i, 1) * 2;
$digits[] = substr($digit, 0, 1);
if (strlen($digit) == 2) {
$digits[] = substr($digit, 1, 1);
}
} else {
$digit = substr($value, $i, 1);
$digits[] = $digit;
}
$j++;
}
$sum = array_sum($digits);
if (($sum%10) == 0) {
return true;
}
return false;
}
}
?>
Zerion Mini Shell 1.0