private char lookahead(int current, int to) {
        if (current + to < length && current + to >= 0)
            return chars[current + to];

        return '\0';
    }
Gets the original string being parsed.

@return The original string.
exts/jphp-zend-ext/src/main/java/org/develnext/jphp/zend/ext/standard/date/DateTimeTokenizer.java