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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);
?>
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