在CodeIgniter中接收“不允许的键字符”错误

Question

I am getting the following message: Disallowed Key Characters and the string producing the message seems to be

__utmt_~42

I am just trying to load the page and for the life of me can't figure out why this is happening. It started out of nowhere. How can I locate the source of this?

Answer 1

Had a similar problem, so, for the sake of Google search results:

__utmt is a cookie. More specificly, a Google Analytics cookie. The ~Number part probably means it's a copy/duplicate. Think of it like the word.doc~1 files that are stored on your computer when working in a Word doc.

So first, check your Analytics code on the website, is there a duplicate somewhere? My problem was solved by altering this duplicated line:

var pageTracker = _gat._getTracker("UA-1234567-89");
var pageTracker = _gat._getTracker("UA-1234567-89");

Weird thing is that the file always had this duplicated line of code, for as far as my GIT goes back. It might be a change in the way analytics code handles cookies...

Oh, and the "Disallowed Key Characters" part. That's normally a good thing, protecting your CI app against evil.

Its in the system\core\Input.php file.

if ( ! preg_match("/^[a-z0-9:_\/-]+$/i", $str)) {
    // there is no ~ in this regex pattern
    // You could add it, but you probably end up breaking other stuff ("/^[\w:~\/]+$/i")
    exit('Disallowed Key Characters');
}