3 // vim: expandtab sw=4 ts=4 sts=4:
7 * This library grabs the names and values of the variables sent or posted to a
8 * script in the $_* arrays and sets simple globals variables from them. It does
9 * the same work for the $PHP_SELF, $HTTP_ACCEPT_LANGUAGE and
10 * $HTTP_AUTHORIZATION variables.
12 * loic1 - 2001/25/11: use the new globals arrays defined with php 4.1+
16 * copy values from one array to another, usally from a superglobal into $GLOBALS
18 * @uses $GLOBALS['_import_blacklist']
19 * @uses preg_replace()
21 * @uses array_unique()
22 * @uses stripslashes()
23 * @param array $array values from
24 * @param array $target values to
25 * @param boolean $sanitize prevent importing key names in $_import_blacklist
27 function PMA_gpc_extract($array, &$target, $sanitize = true)
29 if ( ! is_array($array) ) {
34 $valid_variables = preg_replace($GLOBALS['_import_blacklist'], '',
36 $valid_variables = array_unique($valid_variables);
38 $valid_variables = array_keys($array);
41 foreach ( $valid_variables as $key ) {
43 if ( strlen($key) === 0 ) {
47 if ( is_array($array[$key]) ) {
48 // there could be a variable coming from a cookie of
49 // another application, with the same name as this array
50 unset( $target[$key] );
52 PMA_gpc_extract($array[$key], $target[$key], false);
54 $target[$key] = $array[$key];
62 * @var array $_import_blacklist variable names that should NEVER be imported
65 $_import_blacklist = array(
66 '/^cfg$/i', // PMA configuration
67 '/^server$/i', // selected server
68 '/^db$/i', // page to display
69 '/^table$/i', // page to display
70 '/^goto$/i', // page to display
71 '/^back$/i', // the page go back
72 '/^lang$/i', // selected language
73 '/^convcharset$/i', // PMA convert charset
74 '/^collation_connection$/i', //
76 '/^sql_query$/i', // the query to be executed
77 '/^GLOBALS$/i', // the global scope
78 '/^str.*$/i', // PMA localized strings
79 '/^_.*$/i', // PMA does not use variables starting with _ from extern
80 '/^.*\s+.*$/i', // no whitespaces anywhere
81 '/^[0-9]+.*$/i', // numeric variable names
82 //'/^PMA_.*$/i', // other PMA variables
86 PMA_gpc_extract($_GET, $GLOBALS);
89 if (! empty($_POST)) {
90 PMA_gpc_extract($_POST, $GLOBALS);
93 if (! empty($_FILES)) {
94 $_valid_variables = preg_replace($GLOBALS['_import_blacklist'], '', array_keys($_FILES));
95 foreach ($_valid_variables as $name) {
96 if (strlen($name) != 0) {
97 $
$name = $_FILES[$name]['tmp_name'];
98 $
{$name . '_name'} = $_FILES[$name]['name'];
101 unset($name, $value);
105 * globalize some environment variables
107 $server_vars = array('PHP_SELF', 'HTTP_ACCEPT_LANGUAGE', 'HTTP_AUTHORIZATION');
108 foreach ($server_vars as $current) {
109 // its not important HOW we detect html tags
110 // its more important to prevent XSS
111 // so its not important if we result in an invalid string,
112 // its even better than a XSS capable string
113 if (PMA_getenv($current) && false === strpos(PMA_getenv($current), '<')) {
114 $
$current = PMA_getenv($current);
115 // already importet by register_globals?
116 } elseif (! isset($
$current) ||
false !== strpos($
$current, '<')) {
120 unset($server_vars, $current, $_import_blacklist);