Piwik\DataTable\Renderer\Csv::makeArrayFromDataTable PHP Method

    private function makeArrayFromDataTable($table, &$allColumns)
    {
        $csv = array();
        foreach ($table->getRows() as $row) {
            $csvRow = $this->flattenColumnArray($row->getColumns());
            if ($this->exportMetadata) {
                $metadata = $row->getMetadata();
                foreach ($metadata as $name => $value) {
                    if ($name == 'idsubdatatable_in_db') {
                        continue;
                    }
                    //if a metadata and a column have the same name make sure they don't overwrite
                    if ($this->translateColumnNames) {
                        $name = Piwik::translate('General_Metadata') . ': ' . $name;
                    } else {
                        $name = 'metadata_' . $name;
                    }
                    if (is_array($value)) {
                        if (!in_array($name, $this->unsupportedColumns)) {
                            $this->unsupportedColumns[] = $name;
                        }
                    } else {
                        $csvRow[$name] = $value;
                    }
                }
            }
            foreach ($csvRow as $name => $value) {
                if (in_array($name, $this->unsupportedColumns)) {
                    unset($allColumns[$name]);
                } else {
                    $allColumns[$name] = true;
                }
            }
            if ($this->exportIdSubtable) {
                $idsubdatatable = $row->getIdSubDataTable();
                if ($idsubdatatable !== false && $this->hideIdSubDatatable === false) {
                    $csvRow['idsubdatatable'] = $idsubdatatable;
                }
            }
            $csv[] = $csvRow;
        }
        if (!empty($this->unsupportedColumns)) {
            foreach ($this->unsupportedColumns as $unsupportedColumn) {
                foreach ($csv as $index => $row) {
                    unset($row[$index][$unsupportedColumn]);
                }
            }
        }
        return $csv;
    }