weird characters in the url

[eluser]shadow player[/eluser]
"CF84CEB5CF83CF84" is your string in hexadecimal representation.

Code:

function hexToStr($hex)
{
    $string='';
    for ($i=0; $i < strlen($hex)-1; $i+=2)
    {
        $string .= chr(hexdec($hex[$i].$hex[$i+1]));
    }
    return $string;
}

echo hexToStr('CF84CEB5CF83CF84');

That will output 'τεστ'