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- <?php
- /* $Id: grab_globals.lib.php,v 2.27.2.1 2006/04/11 16:33:33 cybot_tm Exp $ */
- // vim: expandtab sw=4 ts=4 sts=4:
-
-
- /**
- * This library grabs the names and values of the variables sent or posted to a
- * script in the $_* arrays and sets simple globals variables from them. It does
- * the same work for the $PHP_SELF, $HTTP_ACCEPT_LANGUAGE and
- * $HTTP_AUTHORIZATION variables.
- *
- * loic1 - 2001/25/11: use the new globals arrays defined with php 4.1+
- */
-
- /**
- * copy values from one array to another, usally from a superglobal into $GLOBALS
- *
- * @uses $GLOBALS['_import_blacklist']
- * @uses preg_replace()
- * @uses array_keys()
- * @uses array_unique()
- * @uses stripslashes()
- * @param array $array values from
- * @param array $target values to
- * @param boolean $sanitize prevent importing key names in $_import_blacklist
- */
- function PMA_gpc_extract($array, &$target, $sanitize = true)
- {
- if ( ! is_array($array) ) {
- return false;
- }
-
- if ( $sanitize ) {
- $valid_variables = preg_replace($GLOBALS['_import_blacklist'], '',
- array_keys($array));
- $valid_variables = array_unique($valid_variables);
- } else {
- $valid_variables = array_keys($array);
- }
-
- foreach ( $valid_variables as $key ) {
-
- if ( strlen($key) === 0 ) {
- continue;
- }
-
- if ( is_array($array[$key]) ) {
- // there could be a variable coming from a cookie of
- // another application, with the same name as this array
- unset( $target[$key] );
-
- PMA_gpc_extract($array[$key], $target[$key], false);
- } else {
- $target[$key] = $array[$key];
- }
- }
- return true;
- }
-
-
- /**
- * @var array $_import_blacklist variable names that should NEVER be imported
- * from superglobals
- */
- $_import_blacklist = array(
- '/^cfg$/i', // PMA configuration
- '/^server$/i', // selected server
- '/^db$/i', // page to display
- '/^table$/i', // page to display
- '/^goto$/i', // page to display
- '/^back$/i', // the page go back
- '/^lang$/i', // selected language
- '/^convcharset$/i', // PMA convert charset
- '/^collation_connection$/i', //
- '/^set_theme$/i', //
- '/^sql_query$/i', // the query to be executed
- '/^GLOBALS$/i', // the global scope
- '/^str.*$/i', // PMA localized strings
- '/^_.*$/i', // PMA does not use variables starting with _ from extern
- '/^.*\s+.*$/i', // no whitespaces anywhere
- '/^[0-9]+.*$/i', // numeric variable names
- //'/^PMA_.*$/i', // other PMA variables
- );
-
- if ( ! empty( $_GET ) ) {
- PMA_gpc_extract($_GET, $GLOBALS);
- }
-
- if ( ! empty( $_POST ) ) {
- PMA_gpc_extract($_POST, $GLOBALS);
- }
-
- if ( ! empty( $_FILES ) ) {
- foreach ( $_FILES AS $name => $value ) {
- $$name = $value['tmp_name'];
- ${$name . '_name'} = $value['name'];
- }
- unset( $name, $value );
- }
-
- /**
- * globalize some environment variables
- */
- $server_vars = array('PHP_SELF', 'HTTP_ACCEPT_LANGUAGE', 'HTTP_AUTHORIZATION');
- foreach ( $server_vars as $current ) {
- // its not important HOW we detect html tags
- // its more important to prevent XSS
- // so its not important if we result in an invalid string,
- // its even better than a XSS capable string
- if (PMA_getenv($current) && false === strpos(PMA_getenv($current), '<')) {
- $$current = PMA_getenv($current);
- // already importet by register_globals?
- } elseif ( ! isset( $$current ) || false !== strpos($$current, '<') ) {
- $$current = '';
- }
- }
- unset($server_vars, $current, $_import_blacklist);
-
- ?>
-