Form Validator.php:
<?php
/**
*
* Form validator
*
* @author Karolis Tamutis
* @date 2005-08-19
* @file form-validator.php
*
* Copyright (C) 2005 Karolis Tamutis
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
if (!defined('MAIN')) {
die('No direct access.');
}
class FormValidator {
/**
*
* Contains the name of the method used to transfer form data
*
* @var string
*/
var $_method;
/**
*
* Contains filter to field rules
*
* @var array
*/
var $_filters;
/**
*
* Contains filter directory
*
* @var string
*/
var $_filterPath;
/**
*
* Error message if required field's missing
*
* @var string
*/
var $_requiredMsg;
/**
*
* Indicates wether the form was submitted
*
* @var bool
*/
var $_wasSubmitted;
/**
*
* Error buffer
*
* @var array
*/
var $_errors;
/**
*
* A constructor
* @param string $method method used to transfer form data
*/
function FormValidator($method) {
$this->_filters = array();
$this->_filterPath = 'core/';
$this->_requiredMsg = 'You`ve forgot to enter';
$this->_wasSubmitted = false;
$this->_errors = array();
switch (strtolower($method)) {
case 'post':
$this->_method = & $_POST;
break;
case 'get':
$this->_method = & $_GET;
break;
}
}
/**
*
* Method to set filter path
*
* @param string $path filter path
*/
function setFilterPath($path) {
$this->_filterPath = $path;
}
/**
*
* Method to set requiredMsg property
*
* @param string $msg required field error message
*/
function setRequiredMsg($msg) {
$this->_requiredMsg = $msg;
}
/**
*
* Method to check if the form was submited
* Be aware of this issue in IE 6: http://msdn.microsoft.com/library/default.asp?url=/workshop/author/dhtml/reference/objects/input_submit.asp
*
* @param string $s name of submit button
*/
function wasSubmitted($s) {
if (isset($this->_method[$s])) {
$this->_wasSubmitted = true;
return true;
}
return false;
}
/**
*
* Method to set up required fields
*
* @param array $list list with required field names tied with their string names
*/
function addRequired($list) {
$this->_required = $list;
}
/**
*
* Method to add an error string
*
* @param string $errorString
*/
function addError($errorString) {
$id = rand(0, 100);
while (array_key_exists($id, $this->_errors)) {
$id = rand(0, 100);
}
$this->_errors[$id] = $errorString;
}
/**
*
* Method to assign filters to form fields
* A filter, in other works, is a rule, by which we do a validation on a specified field.
* In order to achieve more efficiency, we will not add filters until the form is submitted.
*
* @param string $field name of the form field
* @param string $filter name of the filter to be assigned
* @param array $params array of filter parameters
* @param string $errorStr error string if the filter returns false
*/
function addFilter($field, $filter, $params, $errorStr) {
$this->_filters[$field] = array($filter, $params, $errorStr);
}
/**
*
* Method to perform field validation by assigning filters.
* Executes only if the form was submitted.
*/
function performValidation() {
if ($this->_wasSubmitted && !empty($this->_required)) {
foreach ($this->_required as $key => $value) {
if (array_key_exists($key, $this->_required) && empty($this->_method[$key])) {
$this->_errors[$key] = '<b>'.$this->_requiredMsg.':</b> '.$this->_required[$key];
}
}
if (!empty($this->_filters)) {
foreach ($this->_filters as $key => $value) {
if (is_file($this->_filterPath.$value[0].'.php')) {
require_once($this->_filterPath.$value[0].'.php');
$filter = & new $value[0];
if (!$filter->validate($key, $value[1], $this->_method) && !array_key_exists($key, $this->_errors)) {
$this->_errors[$key] = $value[2];
}
} else {
echo('Filter '.$this->_filterPath.$value[0].'.php'.' does not exist');
}
}
}
}
}
/**
*
* Method to check if the filtering passed clear
*/
function isOk() {
if (!empty($this->_errors)) {
return false;
}
return true;
}
/**
*
* Method to get raw error array.
* You do the error formatting.
*/
function getRawErrors() {
return $this->_errors;
}
/**
*
* Method to get html formatted errors
*/
function getHtmlErrors() {
$str = '<ul class="error">';
foreach ($this->_errors as $value) {
$str .= '<li>'.$value.'</li>';
}
$str .= '</ul>';
return $str;
}
/**
*
* Method to return javascript code, that turns
* failed field border colors to red
*/
function getJs() {
$js = '<script type="text/javascript">';
foreach ($this->_errors as $key => $value) {
if (!is_numeric($key)) {
$js .= 'document.getElementById("'.$key.'").style.borderColor = "#ff0000"; ';
}
}
return $js.'</script>';
}
/**
*
* Method to flush the error buffer
*/
function flushBuffer() {
$this->_errors = array();
}
}
?>
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