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<?php
/**
* @version $Id: globals.php 1145 2005-11-20 22:57:55Z Jinx $
* @package Joomla
* @copyright Copyright (C) 2005 Open Source Matters. All rights reserved.
* @license http://www.gnu.org/copyleft/gpl.html GNU/GPL, see LICENSE.php
* Joomla! is free software and parts of it may contain or be derived from the
* GNU General Public License or other free or open source software licenses.
* See COPYRIGHT.php for copyright notices and details.
*/
/**
* Use 1 to emulate register_globals = on
*
* Use 0 to emulate regsiter_globals = off
*/
define( 'RG_EMULATION', 1 );
/**
* Adds an array to the GLOBALS array and checks that the GLOBALS variable is
* not being attacked
* @param array
* @param boolean True if the array is to be added to the GLOBALS
*/
function checkInputArray( &$array, $globalise=false ) {
static $banned = array( '_files', '_env', '_get', '_post', '_cookie', '_server', '_session', 'globals' );
foreach ($array as $key => $value) {
if (in_array( strtolower( $key ), $banned ) ) {
die( 'Illegal variable <b>' . implode( '</b> or <b>', $banned ) . '</b> passed to script.' );
}
if ($globalise) {
$GLOBALS[$key] = $value;
}
}
}
/**
* Emulates register globals = off
*/
function unregisterGlobals () {
checkInputArray( $_FILES );
checkInputArray( $_ENV );
checkInputArray( $_GET );
checkInputArray( $_POST );
checkInputArray( $_COOKIE );
checkInputArray( $_SERVER );
if (isset( $_SESSION )) {
checkInputArray( $_SESSION );
}
$REQUEST = $_REQUEST;
$GET = $_GET;
$POST = $_POST;
$COOKIE = $_COOKIE;
if (isset ( $_SESSION )) {
$SESSION = $_SESSION;
}
$FILES = $_FILES;
$ENV = $_ENV;
$SERVER = $_SERVER;
foreach ($GLOBALS as $key => $value) {
if ( $key != 'GLOBALS' ) {
unset ( $GLOBALS [ $key ] );
}
}
$_REQUEST = $REQUEST;
$_GET = $GET;
$_POST = $POST;
$_COOKIE = $COOKIE;
if (isset ( $SESSION )) {
$_SESSION = $SESSION;
}
$_FILES = $FILES;
$_ENV = $ENV;
$_SERVER = $SERVER;
}
/**
* Emulates register globals = on
*/
function registerGlobals() {
checkInputArray( $_FILES, true );
checkInputArray( $_ENV, true );
checkInputArray( $_GET, true );
checkInputArray( $_POST, true );
checkInputArray( $_COOKIE, true );
checkInputArray( $_SERVER, true );
if (isset( $_SESSION )) {
checkInputArray( $_SESSION, true );
}
foreach ($_FILES as $key => $value){
$GLOBALS[$key] = $_FILES[$key]['tmp_name'];
foreach ($value as $ext => $value2){
$key2 = $key . '_' . $ext;
$GLOBALS[$key2] = $value2;
}
}
}
if (RG_EMULATION == 0) {
// force register_globals = off
unregisterGlobals();
} else if (ini_get('register_globals') == 0) {
// php.ini has register_globals = off and emulate = on
registerGlobals();
} else {
// php.ini has register_globals = on and emulate = on
// just check for spoofing
checkInputArray( $_FILES );
checkInputArray( $_ENV );
checkInputArray( $_GET );
checkInputArray( $_POST );
checkInputArray( $_COOKIE );
checkInputArray( $_SERVER );
if (isset( $_SESSION )) {
checkInputArray( $_SESSION );
}
}
?>
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