JSON::generateSimple PHP Method

    private function generateSimple($generator, $data, $stripWhitespace)
    {
        $newline = $stripWhitespace ? "" : "\n";
        $tab = $stripWhitespace ? "" : "\t";
        $space = $stripWhitespace ? "" : " ";
        $nested = array();
        $content = "";
        $comma = "";
        if ($generator->isFirstBatch()) {
            $content .= "[";
        } else {
            $comma = ",";
        }
        $numCols = count($data["colData"]);
        $numRows = count($data["rowData"]);
        for ($i = 0; $i < $numRows; $i++) {
            $content .= "{$comma}{$newline}{$tab}{";
            $comma = "";
            for ($j = 0; $j < $numCols; $j++) {
                $varName = preg_replace('/"/', '\\"', $data["colData"][$j]);
                // x.y.z field names => Nested JSON
                $levels = explode(".", $varName);
                $fieldName = array_pop($levels);
                // How many nested levels match the previous column?
                for ($k = 0; $k < count($levels) && $k < count($nested) && $nested[$k] === $levels[$k]; $k++) {
                }
                // Pop closing levels
                while (count($nested) > $k) {
                    $content .= $newline . str_repeat($tab, count($nested) + 1) . "}";
                    array_pop($nested);
                    $comma = ",";
                }
                // Push new nested levels
                for ($l = $k; $l < count($levels); $l++) {
                    $lev = $levels[$l];
                    array_push($nested, $lev);
                    $content .= "{$comma}{$newline}" . str_repeat($tab, $l + 2) . "\"{$lev}\":{$space}{";
                    $comma = "";
                }
                $value = $data["rowData"][$i][$j];
                if (!($this->numericFields[$j] && is_numeric($value))) {
                    $value = "\"{$value}\"";
                }
                $content .= "{$comma}{$newline}" . str_repeat($tab, count($nested) + 2) . "\"{$fieldName}\":{$space}{$value}";
                $comma = ",";
            }
            // Pop all levels
            while (count($nested) > 0) {
                $content .= $newline . str_repeat($tab, count($nested) + 1) . "}";
                array_pop($nested);
            }
            $content .= "{$newline}{$tab}}";
            $comma = ",";
        }
        if ($generator->isLastBatch()) {
            $content .= "{$newline}]";
        }
        return $content;
    }