PhpParser\Lexer::handleInvalidCharacterRange PHP Method

    private function handleInvalidCharacterRange($start, $end, $line, ErrorHandler $errorHandler)
    {
        for ($i = $start; $i < $end; $i++) {
            $chr = $this->code[$i];
            if ($chr === 'b' || $chr === 'B') {
                // HHVM does not treat b" tokens correctly, so ignore these
                continue;
            }
            if ($chr === "") {
                // PHP cuts error message after null byte, so need special case
                $errorMsg = 'Unexpected null byte';
            } else {
                $errorMsg = sprintf('Unexpected character "%s" (ASCII %d)', $chr, ord($chr));
            }
            $errorHandler->handleError(new Error($errorMsg, ['startLine' => $line, 'endLine' => $line, 'startFilePos' => $i, 'endFilePos' => $i]));
        }
    }