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Sources for file plugins/class/filter.php in version 3.0
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/**
* Project: Xnyo: Application Backend
* File: plugins/class/filter.php
* Input Filter Control Functions
*
* Website: http://xnyo.odynia.org/
* Manual: http://xnyo.odynia.org/manual/
*
* Version: 3.0-dev
* SVN Id: $Id: filter.php 57 2004-09-12 10:30:17Z bok $
* SVN URL: $HeadURL: http://svn.odynia.org/xnyo/trunk/plugins/class/filter.php $
* Authors: Robert Amos <bok[at]odynia.org>
* Andrew Wellington <proton[at]wiretapped.net>
* vort <vort[at]solutionstap.com>
*
* Copyright (c) 2001-2004 Robert Amos <bok[at]odynia.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
**/
class filter_plugin
{
// storage container!
private $storage;
// Initialise and auto-filter
public function init ()
{
global $xnyo_parent;
// setup our cache
$this->storage = new stdClass;
// caching for input variables
$this->storage->get_vars = $_GET;
$this->storage->post_vars = $_POST;
$this->storage->cookie_vars = $_COOKIE;
// unset varibles
$_GET = $_POST = $_COOKIE = $_REQUEST = array();
// filter the get variables (if we have any)
if (XNYO_DEBUG) $xnyo_parent->debug('Filtering GET Variables');
if (count($xnyo_parent->get_vars))
foreach ($this->storage->get_vars as $key => $var)
// if they havent specified this variable then obviously we ignore it here
if (!empty($xnyo_parent->get_vars[$key]))
$this->filter_get_var($key, $xnyo_parent->get_vars[$key]);
// do the same to the post variables
if (XNYO_DEBUG) $xnyo_parent->debug('Filtering POST Variables');
if (count($xnyo_parent->post_vars))
foreach ($this->storage->post_vars as $key => $var)
if (!empty($xnyo_parent->post_vars[$key]))
$this->filter_post_var($key, $xnyo_parent->post_vars[$key]);
// do the same to the post variables
if (XNYO_DEBUG) $xnyo_parent->debug('Filtering Cookie Variables.');
if (count($xnyo_parent->cookie_vars))
foreach ($this->storage->cookie_vars as $key => $var)
if (!empty($xnyo_parent->cookie_vars[$key]))
$this->filter_cookie_var($key, $xnyo_parent->cookie_vars[$key]);
}
/**
* Filter GET var
*
* Allow a GET variable through the filter.
**/
public function filter_get_var ($name, $type=NULL)
{
global $xnyo_parent;
// defaults, cant have an empty name, but set type to text
if (empty($name))
return false;
if (empty($type))
$type = 'text';
// obviously if its not set we die..
if (!isset($this->storage->get_vars[$name]))
return false;
$_GET[$name] = $this->_filter_var($this->storage->get_vars[$name], $type);
// ok if the variable has been modified from its original state then we need to know!
if (is_array($_GET[$name]))
{
foreach ($_GET[$name] as $k => $v)
$xnyo_parent->input_modified['get'][$name][$k] = $_GET[$name][$k] != $v;
} else
{
$xnyo_parent->input_modified['get'][$name] = $_GET[$name] != $this->storage->get_vars[$name];
}
// debug
if (XNYO_DEBUG) $xnyo_parent->debug('Filtering GET variable <i>'.$name.'</i> ('.$type.').
'.($xnyo_parent->input_modified['get'][$name] ? 'Modified.' : 'Not modified.'));
// add to the request variables
if (empty($_REQUEST[$name]))
$_REQUEST[$name] = $_GET[$name];
// globals on?
if ($xnyo_parent->global_vars && !isset($GLOBALS[$name]))
$GLOBALS[$name] = $_GET[$name];
return true;
}
/**
* Filter POST Var
*
* Allow a POST variable through
**/
public function filter_post_var ($name, $type=NULL)
{
global $xnyo_parent;
// defaults, cant have an empty name, but set type to text
if (empty($name))
return false;
if (empty($type))
$type = 'text';
// obviously if its not set we die..
if (!isset($this->storage->post_vars[$name]))
return false;
$_POST[$name] = $this->_filter_var($this->storage->post_vars[$name], $type);
// ok if the variable has been modified from its original state then we need to know!
if (is_array($_POST[$name]))
{
foreach ($_POST[$name] as $k => $v)
$xnyo_parent->input_modified['post'][$name][$k] = $_POST[$name][$k] != $v;
} else
{
$xnyo_parent->input_modified['post'][$name] = $_POST[$name] != $this->storage->post_vars[$name];
}
// debug
if (XNYO_DEBUG) $xnyo_parent->debug('Filtering POST variable <i>'.$name.'</i> ('.$type.').
'.($xnyo_parent->input_modified['post'][$name] ? 'Modified.' : 'Not modified.'));
// add to the request variables
if (empty($_REQUEST[$name]))
$_REQUEST[$name] = $_POST[$name];
// globals on?
if ($xnyo_parent->global_vars && !isset($GLOBALS[$name]))
$GLOBALS[$name] = $_POST[$name];
return true;
}
/**
* Filter Cookie Var
*
* Allow a cookie through the filter
**/
public function filter_cookie_var ($name, $type=NULL)
{
global $xnyo_parent;
// defaults, cant have an empty name, but set type to text
if (empty($name))
return false;
if (empty($type))
$type = 'text';
// obviously if its not set we die..
if (!isset($this->storage->cookie_vars[$name]))
return false;
$_COOKIE[$name] = $this->_filter_var($this->storage->cookie_vars[$name], $type);
// ok if the variable has been modified from its original state then we need to know!
if (is_array($_COOKIE[$name]))
{
foreach ($_COOKIE[$name] as $k => $v)
$xnyo_parent->input_modified['cookie'][$name][$k] = $_COOKIE[$name][$k] != $v;
} else
{
$xnyo_parent->input_modified['cookie'][$name] = $_COOKIE[$name] !=
$this->cookie->get_vars[$name];
}
// debug
if (XNYO_DEBUG) $xnyo_parent->debug('Filtering Cookie variable <i>'.$name.'</i> ('.$type.').
'.($xnyo_parent->input_modified['cookie'][$name] ? 'Modified.' : 'Not modified.'));
// add to the request variables
if (empty($_REQUEST[$name]))
$_REQUEST[$name] = $_POST[$name];
// globals on?
if ($xnyo_parent->global_vars && !isset($GLOBALS[$name]))
$GLOBALS[$name] = $_COOKIE[$name];
return true;
}
/**
* Filter Var
*
* Filter the actual variable
**/
private function _filter_var ($data, $type)
{
global $input;
// deal with arrays
if (is_array($type))
{
$array_type = $type[0];
$type = '_array';
}
if (method_exists($input, $type))
{
// again our arrays
if (!empty($array_type))
$parsed = $input->$type($data, $array_type);
else
$parsed = $input->$type($data);
}
return $parsed;
}
/**
* Fetch!
**/
public function fetch ($type)
{
if (!is_object($this->storage))
return array();
$var = $type.'_vars';
return (array)$this->storage->$var;
}
}