private function _replaceDelimiters ($s)
    {
        foreach ($this->getWordDelimiters() as $delimiter) {
            if ($delimiter == $this->getDelimiterReplacement()) {
                continue;
            }
            if (in_array($delimiter, $this->getNotReplacedChars())) {
                continue;
            }
            
            $s = str_replace($delimiter, $this->getDelimiterReplacement(), $s);
        }
        return $s;
    }