【php开源代码栏目提醒】:网学会员为广大网友收集整理了,sanitize.php,希望对大家有所帮助!
<?php
/* SVN FILE: $Id: sanitize.php 4409 2007-02-02 13:20:59Z phpnut $ */
/**
* 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 2005-2007, Cake Software Foundation, Inc.
* 1785 E. Sahara Avenue, Suite 490-204
* Las Vegas, Nevada 89104
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @filesource
* @copyright Copyright 2005-2007, Cake Software Foundation, Inc.
* @link http://www.cakefoundation.org/projects/info/cakephp Cake
PHP(tm) Project
* @package cake
* @subpackage cake.cake.libs
* @since CakePHP(tm) v 0.10.0.1076
* @version $Revision: 4409 $
* @modifiedby $LastChangedBy: phpnut $
* @lastmodified $Date: 2007-02-02 07:20:59 -0600 (Fri, 02 Feb 2007) $
* @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 $string
* @return string
* @access public
*/
function paranoid($string, $allowed = array()) {
$allow = null;
if (!empty($allowed)) {
foreach($allowed as $value) {
$allow .= "\\$value";
}
}
if (is_array($string)) {
foreach($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 by adding slashes (if needed).
*
* @param string $string
* @return string
* @access public
*/
function sql($string) {
if (!ini_get('magic_quotes_gpc')) {
$string = addslashes($string);
}
return $string;
}
/**
* Returns given string safe for display as HTML. Renders entities.
*
* @param string $string
* @param boolean $remove If true, the string is stripped of all
HTML tags
* @return string
* @access public
*/
function html($string, $remove = false) {
if ($remove) {
$string = strip_tags($string);
} else {
$patterns = array("/\&/", "/%/", "/</", "/>/", '/"/', "/'/", "/\(/", "/\)/", "/\+/", "/-/");
$replacements = array("&", "%", "<", ">", """, "'", "(", ")", "+", "-");
$string = preg_replace($patterns, $replacements, $string);
}
return $string;
}
/**
* Recursively sanitizes given array of data for safe input.
*
* @param mixed $toClean
* @return mixed
* @access public
*/
function cleanArray(&$toClean) {
return $this->cleanArrayR($toClean);
}
/**
* Method used for recursively sanitizing arrays of data
* for safe input
*
* @param array $toClean
* @return array The clean array
* @access public
*/
function cleanArrayR(&$toClean) {
if (is_array($toClean)) {
while(list($k, $v) = each($toClean)) {
if (is_array($toClean[$k])) {
$this->cleanArray($toClean[$k]);
} else {
$toClean[$k] = $this->cleanValue($v);
}
}
} else {
return null;
}
}
/**
* Do we really need to sanitize array keys? If so, we can use this code...
function cleanKey($key) {
if ($key == "")
{
return "";
}
//URL decode and convert chars to HTML entities
$key = htmlspecialchars(urldecode($key));
//Remove ..
$key = preg_replace( "/\.\./", "", $key );
//Remove __FILE__, etc.
$key = preg_replace( "/\_\_(.+?)\_\_/", "", $key );
//Trim
word chars, '.', '-', '_'
$key = preg_replace( "/^([\w\.\-\_]+)$/", "$1", $key );
return $key;
}
*/
/**
* Method used by cleanArray() to sanitize array nodes.
*
* @param string $val
* @return string
* @access public
*/
function cleanValue($val) {
if ($val == "") {
return "";
}
//Replace odd spaces with safe ones
$val = str_replace(" ", " ", $val);
$val = str_replace(chr(0xCA), "", $val);
//Encode any HTML to entities.
$val = $this->html($val);
//Double-check special chars and replace carriage returns with new lines
$val = preg_replace("/\\\$/", "$", $val);
$val = preg_replace("/\r\n/", "\n", $val);
$val = str_replace("!", "!", $val);
$val = str_replace("'", "'", $val);
//Allow unicode (?)
$val = preg_replace("/&#([0-9]+);/s", "&#\\1;", $val);
//Add slashes for SQL
$val = $this->
sql($val);
//Swap user-inputted backslashes (?)
$val = preg_repl