Periods not allowed in CodeIgniter URI?

Question

So after reading this question on API versioning, I decided to prefix all my routes with a version number:

http://localhost/api/1.0/user/login

Answer 1

Open libraries/Input.php (system/core/Input.php in CI version 2.0+) and locate function _clean_input_keys($str){, The whole block should look like so:

function _clean_input_keys($str)
{
    if ( ! preg_match("/^[a-z0-9:_\/-]+$/i", $str))
    {
        exit('Disallowed Key Characters.');
    }

    return $str;
}

Check if this has '.' in the preg_match. If not add it, so that your regular expression look like this-

/^[a-z0-9:_\/-\.]+$/i