How to create csv file using magento

Creating csv files in magento is very easy and flexiable

         $fileName = "example.csv";

         $file_path = Mage::getBaseDir('media').DS.$fileName; // path of the file

         $mage_csv = new Varien_Convert_Parser_Csv();

          try {

         $mage_csv->saveData($file_path, $rows); //note $rows will be two dimensional array

         $mage_csv->setData($rows);

         $result = $mage_csv->unparse();

      

              } catch (Exception $e) {

         echo $e->getMessage();exit;

         }

         header("Content-type: application/csv");

         header("Content-Disposition: attachment; filename=$fileName");

         header("Pragma: no-cache");

         header("Expires: 0");

         echo $result->getData();

         exit;

Example
      
     $fileName = "example.csv";
         $file_path = Mage::getBaseDir('media').DS.$fileName; // path of the file

         $mage_csv = new Varien_Convert_Parser_Csv();
         $rows = array();
        $_data['n'] = 'name';
         $_data['a'] = 'address';
         $_data['g'] = 'gender';
         $rows[]=$_data;

           $data['n'] = 'Ram';
         $data['a'] = 'Hyd';
         $data['g'] = 'Male';
        $rows []=$data;
          try {
         $mage_csv->saveData($file_path, $rows); //note $rows will be two dimensional array
         $mage_csv->setData($rows);
         $result = $mage_csv->unparse();
      
              } catch (Exception $e) {
         echo $e->getMessage();exit;
         }

         header("Content-type: application/csv");
         header("Content-Disposition: attachment; filename=$fileName");
         header("Pragma: no-cache");
         header("Expires: 0");
         echo $result->getData();
         exit;