Need Serious Help! Disallowed Key Characters.

[eluser]mindprojects[/eluser]
The problem was due to the INPUT class,so i made this mod,adding '\$' into the range of the "_clean_input_keys" function:

function _clean_input_keys($str)
{
if ( ! preg_match("/^[a-z\$0-9:_\/-]+$/i", $str))
{
exit('Disallowed Key Characters.');
}

return $str;
}


Correct URL to manage:
http://127.0.0.1/backoffice/adria/bookin...0&nome=qwe&$BRAND=MasterCard

Now the next problem is that i can't get the URI SEGMENT N°4...How to do??
Someone over there?