CodeIgniter - Does 'name' regex match in Cart class support Unicode?

I want to include unicode characters (to be more specific, Tamil words) in the 'name' of my Code Igniter cart. I found this example. I tried the following, so that the regex could match anything:

$this->cart->product_name_rules = '.+';
$this->cart->product_name_rules = '.开发者_StackOverflow*';
$this->cart->product_name_rules = '.';

But for all these, I get the error "An invalid name was submitted as the product name: சும்மாவா சொன்னாங்க பெரியவங்க The name can only contain alpha-numeric characters, dashes, underscores, colons, and spaces" in my log.

Also, thinking it could be due to unicode support, I tried the following:

$this->cart->product_name_rules = '\p{Tamil}';

But to no avail. Can you please point if something wrong here?

Try adding each Tamil character individually to your regex. I had to do this for special characters in input keys:

    if ( ! preg_match("/^[a-z0-9àÀâÂäÄáÁãÃéÉèÈêÊëËìÌîÎïÏòÒôÔöÖõÕùÙûÛüÜçÇ’ñÑß¡¿œŒæÆåÅøØö:_\.\-\/-\\\,]+$/i", $str))
    {
        exit('Disallowed Key Characters.');
    }

Here he posted how did he managed to save the cyrilic character in Codeigniter 1.7.2's cart.