If you only needed register_globals for get/post variables, the effictive solution for 5.3 is:
import_request_variables("GPC", "");
But if the skripts relied on session_register() you'll have to do more:
- Replace all variables that appeared after session_register with _SESSION equivalents - so $myvar becomes $_SESSION['myvar']
- Take care if your variables appeared inside strings - 'Hello $user !' works, but 'Hello $_SESSION['user'] !' not - so you have to concatenate the string: 'Hello '.$_SESSION['user'] .' !'
- Session variables in function declarations (for whatever purpose) will not work - keeping the old (local) names will work in most cases.
- Finally, replace the session_register(..) line with session_start()
其他问题
有些问题没法归到其它类中，可以在这里找到。
- 在 Windows 中怎样处理 bz2 压缩的文档？
-
如果没有能处理 bz2 文件的压缩工具，从 Redhat » 下载一个命令行工具（进一步信息见下面）。
如果不喜欢用命令行工具，可以试试免费工具例如 » Stuffit Expander， » UltimateZip， » 7-Zip或者 » Quick Zip。如果有像 » WinRAR或者 » Power Archiver之类的工具，可以很容易用它解压缩 bz2 文件。如果用 Total Commander（前身为 Windows Commander），可以从 » Total Commander网站免费得到一个 bz2 插件。
来自 Redhat 的 bzip2 命令行工具：
Win2K Sp2 用户下载最新版本 1.0.2，所有其它 Windows 用户应该用版本 1.00。下载后重命名可执行文件为 bzip2.exe。为方便起见将其放到一个在你路径中的目录，例如 C:\Windows，C 表示你安装 Windows 的盘符。
注意：lang 指的是你的语种，x 是想要的格式，例如：pdf。要解压缩 php_manual_lang.x.bz2，按照下面的简单说明进行：
- 打开一个命令行窗口
- 进入存放已下载的 php_manual_lang.x.bz2 的目录
- 调用 bzip2 -d php_manual_lang.x.bz2，将 php_manual_lang.x 释放到同一个目录
在下载了包含很多 html 文件的 php_manual_lang.tar.bz2 的情况下，过程是一样的。唯一区别是得到了一个 php_manual_lang.tar 文件。tar 格式可以被大多数 Windows 下流行的压缩工具所处理，例如 » WinZip。
add a note
User Contributed Notes 3 notes
doerr at apkk dot de ¶
13 years ago
php at REMOVEMEkennel17 dot co dot uk ¶
19 years ago
Regarding simulating register_globals = off, note that it is impossible to adequately prevent $_SESSION variables from being globalised, as the array (and thus the globals) are created on a call to session_start(). You would therefore have to 'undo' this when you start a session as using it at the start of your script will have no effect.
To avoid potential problems, use a prefix that is unique for all session variables (e.g. 'SESS_'), and only access them via the $_SESSION array. The prefix ensures that you don't have a naming clash (and therefore a security risk) with any non-session globals.
markus ¶
18 years ago
Considering the comment below. I think there's a way to avoid that "problem":
<?php
//
// $starttime is an example of a variable that we might need to define,
// even before, running the "register_globals OFF" emulator below.
//
list($msec, $sec) = explode(' ', microtime());
$starttime = ((float)$msec + (float)$sec);
//
// If register_globals is ON, ensure no unexpected globals are defined.
// ie. We'll try to emulate a register_globals OFF environment.
//
if( (bool)@ini_get('register_globals') )
{
$superglobals = array($_ENV, $_GET, $_POST, $_COOKIE, $_FILES, $_SERVER);
if( isset($_SESSION) )
{
array_unshift($superglobals, $_SESSION);
}
$knownglobals = array(
//
// Known PHP Reserved globals and superglobals:
//
'_ENV', 'HTTP_ENV_VARS',
'_GET', 'HTTP_GET_VARS',
'_POST', 'HTTP_POST_VARS',
'_COOKIE', 'HTTP_COOKIE_VARS',
'_FILES', 'HTTP_FILES_VARS',
'_SERVER', 'HTTP_SERVER_VARS',
'_SESSION', 'HTTP_SESSION_VARS',
'_REQUEST',
//
// Global variables used by this code snippet:
//
'superglobals',
'knownglobals',
'superglobal',
'global',
'void',
//
// Known global variables defined before this code snippet is reached.
//
'starttime',
);
foreach( $superglobals as $superglobal )
{
foreach( $superglobal as $global => $void )
{
if( !in_array($global, $knownglobals) )
{
unset($GLOBALS[$global]);
}
}
}
}
?>
Note the stuff related to the $_SESSION array depends on whether the PHP session has been started or not. You might want to call session_start() before this point (or set session.auto_start ON).
HTH+ :)
