I got some works made with CodeIgnitor framework…
Some of them were returning me
Disallowed Key Characters
The solution was, on system/core/Input.php make the following change
if ( ! preg_match("/^[a-z0-9:_\/-]+$/i", $str))
{
exit('Disallowed Key Characters.');
}
To
if ( ! preg_match("/^[a-z0-9:_\/-~]+$/i", $str))
{
exit('Disallowed Key Characters.');
}