なぜマジッククオートを使用しないのか
I have recently found out that magic quotes affects not only the values of the GPC arrays, but also the keys.
For now, my way to solve with the problem is:
<?php
if (get_magic_quotes_gpc()) {
function magicQuotes_awStripslashes(&$value, $key) {$value = stripslashes($value);}
$gpc = array(&$_GET, &$_POST, &$_COOKIE, &$_REQUEST);
array_walk_recursive($gpc, 'magicQuotes_awStripslashes');
}
?>
Unfortunately it doesn't fix the keys... and cannot determinate if the slashes are already stripped.
マジッククオートを無効にする
警告
この機能は PHP 5.3.0 で 非推奨となり、PHP 6.0.0 で削除されます。 この機能を使用しないことを強く推奨します。
magic_quotes_gpc ディレクティブはシステムレベルでのみ無効にすることができ、 実行時に行うことはできません。 つまり、ini_set() では指定できません。
例1 マジッククオートをサーバ側で無効にする
このディレクティブをphp.iniで Off にする 例を示します。 より詳細については、 設定を変更する方法というタイトルのマニュアルのセクションを 参照してください。
; Magic quotes ; ; Magic quotes for incoming GET/POST/Cookie data. magic_quotes_gpc = Off ; Magic quotes for runtime-generated data, e.g. data from SQL, from exec(), etc. magic_quotes_runtime = Off ; Use Sybase-style magic quotes (escape ' with '' instead of \'). magic_quotes_sybase = Off
サーバの設定を変更できない場合には、 .htaccessも使用できます。 例えば、
php_flag magic_quotes_gpc Off
サーバレベルの設定を変更できない場合に対応するといったように、 移植性の高いコード(あらゆる環境で動作するコード)を書く要望に 対して、以下に、 magic_quotes_gpcを実行時に無効にする例を示します。 この方法は非効率であるため、どこかでディレクティブを適切に 設定する方が良いでしょう。
例2 マジッククオートを実行時に無効にする
<?php
if (get_magic_quotes_gpc()) {
function stripslashes_deep($value)
{
$value = is_array($value) ?
array_map('stripslashes_deep', $value) :
stripslashes($value);
return $value;
}
$_POST = array_map('stripslashes_deep', $_POST);
$_GET = array_map('stripslashes_deep', $_GET);
$_COOKIE = array_map('stripslashes_deep', $_COOKIE);
$_REQUEST = array_map('stripslashes_deep', $_REQUEST);
}
?>
add a note
User Contributed Notesマジッククオートを無効にする
metala at metala dot org
22-Jun-2009 12:38
22-Jun-2009 12:38
booboogotu at gmail dot com
18-Jun-2009 12:46
18-Jun-2009 12:46
A php5 way:
<?php
if (get_magic_quotes_gpc()) {
function stripslashes_gpc(&$value)
{
$value = stripslashes($value);
}
array_walk_recursive($_GET, 'stripslashes_gpc');
array_walk_recursive($_POST, 'stripslashes_gpc');
array_walk_recursive($_COOKIE, 'stripslashes_gpc');
array_walk_recursive($_REQUEST, 'stripslashes_gpc');
}
?>
stuart at horuskol dot co dot uk
25-Apr-2008 10:26
25-Apr-2008 10:26
I have discovered that my host doesn't like either of the following directives in the .htaccess file:
php_flag magic_quotes_gpc Off
php_value magic_quotes_gpc Off
However, there is another way to disable this setting even if you don't have access to the server configuration - you can put a php.ini file in the directory where your scripts are with the directive:
magic_quotes_gpc = Off
However, these does not propogate unlike .htaccess rules, so if you launch from a sub-directory, you need the php.ini file in each directory you have as script entry points.
17-Dec-2006 09:20
PHP's magic quotes function has the strange behavior of not adding slashes to top level keys in GPC key/value pairs but adding the slashes in deeper level keys. To demonstrate, a URI of:
example.php?a'b[c'd]=e'f
produces:
array("a'b" => array("c\'d" => "e\'f"))
The current example for removing magic quotes does not do anything to keys, so after running stripslashes_deep, you would end up with:
array("a'b" => array("c\'d" => "e'f"))
Which, needless to say, is wrong. As if you had magic quotes off, it would have been:
array("a'b" => array("c'd" => "e'f"))
I have written a snippet of code compatible with PHP 4.0.0 and above that handles this correctly:
if (get_magic_quotes_gpc()) {
function undoMagicQuotes($array, $topLevel=true) {
$newArray = array();
foreach($array as $key => $value) {
if (!$topLevel) {
$key = stripslashes($key);
}
if (is_array($value)) {
$newArray[$key] = undoMagicQuotes($value, false);
}
else {
$newArray[$key] = stripslashes($value);
}
}
return $newArray;
}
$_GET = undoMagicQuotes($_GET);
$_POST = undoMagicQuotes($_POST);
$_COOKIE = undoMagicQuotes($_COOKIE);
$_REQUEST = undoMagicQuotes($_REQUEST);
}
sunrunner20
25-Nov-2006 04:10
25-Nov-2006 04:10
If php_flag magic_quotes_gpc off does not work
Use php_value magic_quotes_gpc off
insteadin your .htaccess file
rdk
08-Sep-2006 08:44
08-Sep-2006 08:44
The function parse_str() (http://us3.php.net/manual/en/function.parse-str.php) is also affected by magic_quotes_gpc, so if that function is called anywhere, stripslashes_deep won't be sufficient by itself.
dedlfix
20-Aug-2006 02:18
20-Aug-2006 02:18
The function stripslashes_deep() ignores slashes in the keys
For example a query string like this: ?foo'bar=baz'bal
Output of var_dump($_GET) is:
array(1) {
["foo\'bar"]=>
string(8) "baz\'bal"
}
after stripslashes_deep():
array(1) {
["foo\'bar"]=>
string(7) "baz'bal"
}
If you want the keys to be stripslashed too, you have to unset() the addslahed key and to add a stripslashed version. But keep in mind that this will change the order of the array.