It's just a view - code sample

dataformatters.php

<?php

abstract class TableDataFormatter
{
    protected $columnConfiguration;

    public function __construct(array $columnConfiguration)
    {
        $this->columnConfiguration = $columnConfiguration;
    }

    public function addData(array $data)
    {
        foreach ($data as $result) {
            $values = array();
            foreach ($this->columnConfiguration as $columnNumber => $columnDef) {
                $values[] = $this->getColumnValue($result, $columnDef);
            }

            $this->addRow($values);
        }
    }

    protected function getColumnValue($item, $columnDef)
    {
        return $item->{$columnDef['getter']}();
    }

    abstract protected function addRow(array $cellValues);
}

class HtmlTableDataFormatter extends TableDataFormatter
{

    protected function addRow(array $cellValues)
    {
        $this->output .= '<tr>';
        foreach ($cellValues as $value) {
             $this->output .= '<td>' . $value . '</td>';
        }
        $this->output .= '</tr>';
    }

    public function getOutput()
    {
        return $this->output;
    }
}

class ExcelTableDataFormatter extends TableWriter
{
    private $lastColumn = 0;
    private $lastRow = 0;
    private $excelWriter;

    public function __construct($columnConfiguration, $excelWriter)
    {
        $this->excelWriter = $excelWriter;

        parent::__construct($columnConfiguration);
    }

    protected function addRow(array $cellValues)
    {
        $row = $this->getNextRow();
        $worksheet = $this->excelWriter->getActiveSheet();

        foreach ($cellValues as $value) {
            $worksheet->setCellValueByColumnAndRow($this->getNextColumn(), $row, $value);
        }
    }

    public function getNextRow()
    {
        $this->lastColumn = 0;
        return $this->lastRow++;
    }

    public function getNextColumn()
    {
        return $this->lastColumn++;
    }

    public function getOutput()
    {
        $this->excelWriter->save($this->getFilename());

        return $this->getFilename();
    }
}