<?php
// 如果需要在一台关闭了 register_globals 的共享主机上运行一些旧式程序而该程序需要此选项打开时怎么办？
// Emulate register_globals on
if (!ini_get('register_globals')) {
$superglobals= array($_SERVER,$_ENV,$_FILES,$_COOKIE,$_POST,$_GET);
if (isset($_SESSION)) {
array_unshift($superglobals,$_SESSION);
}
foreach ($superglobals as $superglobal) {
extract($superglobal,EXTR_SKIP);
}
}
?>
<?php
// 如果需要在一些打开了register_globals选项的主机上但想消除安全隐患，该怎么办？
// Emulate register_globals off
functionun register_GLOBALS(){
if (!ini_get('register_globals')) {
return;
}
// Might want to change this perhaps to a nicer error
if (isset($_REQUEST['GLOBALS']) || isset($_FILES['GLOBALS'])) {
die('GLOBALS overwrite attempt detected');
}
// Variables that shouldn’t be unset
$noUnset= array('GLOBALS','_GET','_POST','_COOKIE','_REQUEST','_SERVER','_ENV','_FILES');
$input=array_merge($_GET,$_POST,$_COOKIE,$_SERVER,$_ENV,$_FILES,isset($_SESSION) &&is_array($_SESSION) ?$_SESSION: array());
foreach ($input as $k=>$v) {
if (!in_array($k,$noUnset) && isset($GLOBALS[$k])) {
unset($GLOBALS[$k]);
}
}
}
unregister_GLOBALS();
?>