Bolt\Storage\Query\QueryParameterParser::multipleKeyAndValueHandler PHP Method

    public function multipleKeyAndValueHandler($key, $value, $expr)
    {
        if (!strpos($key, '|||')) {
            return null;
        }
        $keys = preg_split('/ *(\\|\\|\\|) */', $key);
        $inputKeys = $keys;
        $values = preg_split('/ *(\\|\\|\\|) */', $value);
        $values = array_pad($values, count($keys), end($values));
        $filterParams = [];
        $parts = [];
        $count = 1;
        while (($key = array_shift($keys)) && ($val = array_shift($values))) {
            $multipleValue = $this->multipleValueHandler($key, $val, $this->expr);
            if ($multipleValue) {
                $filter = $multipleValue->getExpression();
                $filterParams = $filterParams + $multipleValue->getParameters();
            } else {
                $val = $this->parseValue($val);
                $placeholder = $key . '_' . $count;
                $filterParams[$placeholder] = $val['value'];
                $exprMethod = $val['operator'];
                $filter = $this->expr->{$exprMethod}($this->alias . $key, ':' . $placeholder);
            }
            $parts[] = $filter;
            $count++;
        }
        $filter = new Filter();
        $filter->setKey($inputKeys);
        $filter->setExpression(call_user_func_array([$expr, 'orX'], $parts));
        $filter->setParameters($filterParams);
        return $filter;
    }