Description:
------------
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);
}

Perhaps you should replace the example in the manual with my code
snippet. Oh and I have left a comment there too for users who visit the
page before you guys fix it. So someone could delete that once it's
fixed.

The behavior of keys escaping changed between PHP versions.