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Asked: 2026-05-22T16:37:35+00:00

Possible Duplicate: CodeIgniter Disallowed Key Characters I recently upgraded CI from 1.7 to 2.0.

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Possible Duplicate:
CodeIgniter Disallowed Key Characters

I recently upgraded CI from 1.7 to 2.0. There after i started receiving CI’s

Disallowed Key Characters

error.

I then allowed all characters to be accepted to see if the error would disappear.

$config['permitted_uri_chars'] = '';

However, this did not change anything

i also have enabled query strings

$config['enable_query_strings'] = TRUE;

I just don’t know why i am getting the disallowed characters error when i am allowing all characters to be accepted.

Here is a url example where i would get the disallowed key characters error:

http://localhost/myapp/index.php??c=user&m=login

However, if i were to remove one of the ‘?’ it works

http://localhost/myapp/index.php?c=user&m=login

I do have an htaccess file that contains:

RewriteEngine on
RewriteRule (.*)/index.php $1/ [L]

any help?

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1 Answer

  1. Editorial Team

    It looks like CodeIgniter does a separate check for GET/POST/and cookie data key names where it validates them against:

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

    See: https://bitbucket.org/ellislab/codeigniter/src/c2dad3edb148/system/core/Input.php#cl-537

    I don’t see an easy way to disable this check other than editing/subclassing Input.php. You’re probably better off using keys without weird symbols anyway though.

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