Translation update done using Pootle.
[phpmyadmin.git] / libraries / grab_globals.lib.php
blob13596260babea8f5b0bde35638566d45c9259267
1 <?php
2 /* vim: set expandtab sw=4 ts=4 sts=4: */
3 /**
4 * This library grabs the names and values of the variables sent or posted to a
5 * script in $_GET, $_POST and $_FILES superglobals and sets simple globals
6 * variables from them. It does the same work for $HTTP_ACCEPT_LANGUAGE and
7 * $HTTP_AUTHORIZATION.
9 * @package PhpMyAdmin
11 if (! defined('PHPMYADMIN')) {
12 exit;
15 /**
16 * copy values from one array to another, usually from a superglobal into $GLOBALS
18 * @param array $array values from
19 * @param array &$target values to
20 * @param bool $sanitize prevent importing key names in $_import_blacklist
21 * @return bool
23 function PMA_recursive_extract($array, &$target, $sanitize = true)
25 if (! is_array($array)) {
26 return false;
29 if ($sanitize) {
30 $valid_variables = preg_replace($GLOBALS['_import_blacklist'], '',
31 array_keys($array));
32 $valid_variables = array_unique($valid_variables);
33 } else {
34 $valid_variables = array_keys($array);
37 foreach ($valid_variables as $key) {
39 if (strlen($key) === 0) {
40 continue;
43 if (is_array($array[$key])) {
44 // there could be a variable coming from a cookie of
45 // another application, with the same name as this array
46 unset($target[$key]);
48 PMA_recursive_extract($array[$key], $target[$key], false);
49 } else {
50 $target[$key] = $array[$key];
53 return true;
57 /**
58 * @var array $_import_blacklist variable names that should NEVER be imported
59 * from superglobals
61 $_import_blacklist = array(
62 '/^cfg$/i', // PMA configuration
63 '/^server$/i', // selected server
64 '/^db$/i', // page to display
65 '/^table$/i', // page to display
66 '/^goto$/i', // page to display
67 '/^back$/i', // the page go back
68 '/^lang$/i', // selected language
69 '/^collation_connection$/i', //
70 '/^set_theme$/i', //
71 '/^sql_query$/i', // the query to be executed
72 '/^GLOBALS$/i', // the global scope
73 '/^str.*$/i', // PMA localized strings
74 '/^error_handler.*$/i', // the error handler
75 '/^_.*$/i', // PMA does not use variables starting with _ from extern
76 '/^.*\s+.*$/i', // no whitespaces anywhere
77 '/^[0-9]+.*$/i', // numeric variable names
78 //'/^PMA_.*$/i', // other PMA variables
81 if (! empty($_GET)) {
82 PMA_recursive_extract($_GET, $GLOBALS);
85 if (! empty($_POST)) {
86 PMA_recursive_extract($_POST, $GLOBALS);
89 if (! empty($_FILES)) {
90 $_valid_variables = preg_replace($GLOBALS['_import_blacklist'], '', array_keys($_FILES));
91 foreach ($_valid_variables as $name) {
92 if (strlen($name) != 0) {
93 $$name = $_FILES[$name]['tmp_name'];
94 ${$name . '_name'} = $_FILES[$name]['name'];
97 unset($name, $value);
101 * globalize some environment variables
103 $server_vars = array('HTTP_ACCEPT_LANGUAGE', 'HTTP_AUTHORIZATION');
104 foreach ($server_vars as $current) {
105 // it's not important HOW we detect html tags
106 // it's more important to prevent XSS
107 // so it's not important if we result in an invalid string,
108 // it's even better than a XSS capable string
109 if (PMA_getenv($current) && false === strpos(PMA_getenv($current), '<')) {
110 $$current = PMA_getenv($current);
111 // already imported by register_globals?
112 } elseif (! isset($$current) || false !== strpos($$current, '<')) {
113 $$current = '';
116 unset($server_vars, $current, $_import_blacklist);