CI_Trackback::limit_characters PHP Method

    public function limit_characters($str, $n = 500, $end_char = '…')
    {
        if (strlen($str) < $n) {
            return $str;
        }
        $str = preg_replace('/\\s+/', ' ', str_replace(array("\r\n", "\r", "\n"), ' ', $str));
        if (strlen($str) <= $n) {
            return $str;
        }
        $out = '';
        foreach (explode(' ', trim($str)) as $val) {
            $out .= $val . ' ';
            if (strlen($out) >= $n) {
                return rtrim($out) . $end_char;
            }
        }
    }