sequenceMatches example

    protected function rcdata($tok)
    {
        if (is_null($this->untilTag)) {
            return $this->text($tok);
        }

        $sequence = '</' . $this->untilTag;
        $txt = '';

        $caseSensitive = !Elements::isHtml5Element($this->untilTag);
        while (false !== $tok && !('<' == $tok && ($this->scanner->sequenceMatches($sequence, $caseSensitive)))) {
            if ('&' == $tok) {
                $txt .= $this->decodeCharacterReference();
                $tok = $this->scanner->current();
            } else {
                $txt .= $tok;
                $tok = $this->scanner->next();
            }
        }
        $len = strlen($sequence);
        $this->scanner->consume($len);
        $len += $this->scanner->whitespace();