Description:
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@$_GET[""] doesn't work properly (a backslace is added) when some encoded chinese character contains "%5C" such as "?\" or "?\". 

Reproduce code:
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In file "test1.php"
$name="?\???\";
HEADER("Location:test2.php?message=".urlencode($name));
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In file "test2.php"
$smessage = @$GET["message"];
echo urlencode($smessage)."<BR>";
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Expected result:
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In page "test2.php"
A message of "?\???\" should be displayed properly.

Actual result:
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However, a message of "?\\???\\" is displayed where 2 "\" is added.