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<?php
/* SVN FILE: $Id$ */
/**
* Washes strings from unwanted noise.
*
* Helpful methods to make unsafe strings usable.
*
* PHP versions 4 and 5
*
* CakePHP(tm) : Rapid Development Framework (http://www.cakephp.org)
* Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @filesource
* @copyright Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)
* @link http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
* @package cake
* @subpackage cake.cake.libs
* @since CakePHP(tm) v 0.10.0.1076
* @version $Revision$
* @modifiedby $LastChangedBy$
* @lastmodified $Date$
* @license http://www.opensource.org/licenses/mit-license.php The MIT License
*/
/**
* Data Sanitization.
*
* Removal of alpahnumeric characters, SQL-safe slash-added strings, HTML-friendly strings,
* and all of the above on arrays.
*
* @package cake
* @subpackage cake.cake.libs
*/
class Sanitize {
/**
* Removes any non-alphanumeric characters.
*
* @param string $string String to sanitize
* @return string Sanitized string
* @access public
* @static
*/
function paranoid($string, $allowed = array()) {
$allow = null;
if (!empty($allowed)) {
foreach ($allowed as $value) {
$allow .= "\\$value";
}
}
if (is_array($string)) {
$cleaned = array();
foreach ($string as $key => $clean) {
$cleaned[$key] = preg_replace("/[^{$allow}a-zA-Z0-9]/", '', $clean);
}
} else {
$cleaned = preg_replace("/[^{$allow}a-zA-Z0-9]/", '', $string);
}
return $cleaned;
}
/**
* Makes a string SQL-safe.
*
* @param string $string String to sanitize
* @param string $connection Database connection being used
* @return string SQL safe string
* @access public
* @static
*/
function escape($string, $connection = 'default') {
$db =& ConnectionManager::getDataSource($connection);
if (is_numeric($string) || $string === null || is_bool($string)) {
return $string;
}
$string = substr($db->value($string), 1);
$string = substr($string, 0, -1);
return $string;
}
/**
* Returns given string safe for display as HTML. Renders entities.
*
* @param string $string String from where to strip tags
* @param boolean $remove If true, the string is stripped of all HTML tags
* @return string Sanitized string
* @access public
* @static
*/
function html($string, $remove = false) {
if ($remove) {
$string = strip_tags($string);
} else {
$patterns = array("/\&/", "/%/", "/</", "/>/", '/"/', "/'/", "/\(/", "/\)/", "/\+/", "/-/");
$replacements = array("&amp;", "&#37;", "&lt;", "&gt;", "&quot;", "&#39;", "&#40;", "&#41;", "&#43;", "&#45;");
$string = preg_replace($patterns, $replacements, $string);
}
return $string;
}
/**
* Strips extra whitespace from output
*
* @param string $str String to sanitize
* @return string whitespace sanitized string
* @access public
* @static
*/
function stripWhitespace($str) {
$r = preg_replace('/[\n\r\t]+/', '', $str);
return preg_replace('/\s{2,}/', ' ', $r);
}
/**
* Strips image tags from output
*
* @param string $str String to sanitize
* @return string Sting with images stripped.
* @access public
* @static
*/
function stripImages($str) {
$str = preg_replace('/(<a[^>]*>)(<img[^>]+alt=")([^"]*)("[^>]*>)(<\/a>)/i', '$1$3$5<br />', $str);
$str = preg_replace('/(<img[^>]+alt=")([^"]*)("[^>]*>)/i', '$2<br />', $str);
$str = preg_replace('/<img[^>]*>/i', '', $str);
return $str;
}
/**
* Strips scripts and stylesheets from output
*
* @param string $str String to sanitize
* @return string String with <script>, <style>, <link> elements removed.
* @access public
* @static
*/
function stripScripts($str) {
return preg_replace('/(<link[^>]+rel="[^"]*stylesheet"[^>]*>|<img[^>]*>|style="[^"]*")|<script[^>]*>.*?<\/script>|<style[^>]*>.*?<\/style>|<!--.*?-->/i', '', $str);
}
/**
* Strips extra whitespace, images, scripts and stylesheets from output
*
* @param string $str String to sanitize
* @return string sanitized string
* @access public
*/
function stripAll($str) {
$str = Sanitize::stripWhitespace($str);
$str = Sanitize::stripImages($str);
$str = Sanitize::stripScripts($str);
return $str;
}
/**
* Strips the specified tags from output. First parameter is string from
* where to remove tags. All subsequent parameters are tags.
*
* @param string $str String to sanitize
* @param string $tag Tag to remove (add more parameters as needed)
* @return string sanitized String
* @access public
* @static
*/
function stripTags() {
$params = params(func_get_args());
$str = $params[0];
for ($i = 1, $count = count($params); $i < $count; $i++) {
$str = preg_replace('/<' . $params[$i] . '\b[^>]*>/i', '', $str);
$str = preg_replace('/<\/' . $params[$i] . '[^>]*>/i', '', $str);
}
return $str;
}
/**
* Sanitizes given array or value for safe input. Use the options to specify
* the connection to use, and what filters should be applied (with a boolean
* value). Valid filters: odd_spaces, encode, dollar, carriage, unicode,
* escape, backslash.
*
* @param mixed $data Data to sanitize
* @param mixed $options If string, DB connection being used, otherwise set of options
* @return mixed Sanitized data
* @access public
* @static
*/
function clean($data, $options = array()) {
if (empty($data)) {
return $data;
}
if (is_string($options)) {
$options = array('connection' => $options);
} else if (!is_array($options)) {
$options = array();
}
$options = array_merge(array(
'connection' => 'default',
'odd_spaces' => true,
'encode' => true,
'dollar' => true,
'carriage' => true,
'unicode' => true,
'escape' => true,
'backslash' => true
), $options);
if (is_array($data)) {
foreach ($data as $key => $val) {
$data[$key] = Sanitize::clean($val, $options);
}
return $data;
} else {
if ($options['odd_spaces']) {
$data = str_replace(chr(0xCA), '', str_replace(' ', ' ', $data));
}
if ($options['encode']) {
$data = Sanitize::html($data);
}
if ($options['dollar']) {
$data = str_replace("\\\$", "$", $data);
}
if ($options['carriage']) {
$data = str_replace("\r", "", $data);
}
$data = str_replace("'", "'", str_replace("!", "!", $data));
if ($options['unicode']) {
$data = preg_replace("/&amp;#([0-9]+);/s", "&#\\1;", $data);
}
if ($options['escape']) {
$data = Sanitize::escape($data, $options['connection']);
}
if ($options['backslash']) {
$data = preg_replace("/\\\(?!&amp;#|\?#)/", "\\", $data);
}
return $data;
}
}
/**
* Formats column data from definition in DBO's $columns array
*
* @param Model $model The model containing the data to be formatted
* @access public
* @static
*/
function formatColumns(&$model) {
foreach ($model->data as $name => $values) {
if ($name == $model->alias) {
$curModel =& $model;
} elseif (isset($model->{$name}) && is_object($model->{$name}) && is_subclass_of($model->{$name}, 'Model')) {
$curModel =& $model->{$name};
} else {
$curModel = null;
}
if ($curModel != null) {
foreach ($values as $column => $data) {
$colType = $curModel->getColumnType($column);
if ($colType != null) {
$db =& ConnectionManager::getDataSource($curModel->useDbConfig);
$colData = $db->columns[$colType];
if (isset($colData['limit']) && strlen(strval($data)) > $colData['limit']) {
$data = substr(strval($data), 0, $colData['limit']);
}
if (isset($colData['formatter']) || isset($colData['format'])) {
switch (strtolower($colData['formatter'])) {
case 'date':
$data = date($colData['format'], strtotime($data));
break;
case 'sprintf':
$data = sprintf($colData['format'], $data);
break;
case 'intval':
$data = intval($data);
break;
case 'floatval':
$data = floatval($data);
break;
}
}
$model->data[$name][$column]=$data;
/*
switch ($colType) {
case 'integer':
case 'int':
return $data;
break;
case 'string':
case 'text':
case 'binary':
case 'date':
case 'time':
case 'datetime':
case 'timestamp':
case 'date':
return "'" . $data . "'";
break;
}
*/
}
}
}
}
}
}
?>
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