Using macros to implement custom response types in Laravel - www.slashnode.com

routes.php

<?php

Response::macro('csv', function($data, $filename = 'data.csv', $status = 200, $delimiter = ",", $linebreak = "\n", $headers = array())
{
    return Response::stream(function () use ($data, $delimiter, $linebreak) {
      foreach ($data as $row) {
          $keys = array(); $values = array();
          $firstPassComplete = (isset($firstPassComplete)) ? true:false;
          foreach ($row as $k => $v) {
              if (!$firstPassComplete){
                //get keys only on the first pass through array since it is repeated for every row
                $keys[] = is_string($k) ? '"' . str_replace('"', '""', $k) . '"' : $k;
              }
              $values[] = is_string($v) ? '"' . str_replace('"', '""', $v) . '"' : $v;
          }
          if (count($keys) > 0) echo implode($delimiter, $keys) . $linebreak;
          if (count($values) > 0) echo implode($delimiter, $values) . $linebreak;
      }
    }, 200, array_merge(array(
        'Content-type' => 'text/csv',
        'Cache-Control' => 'must-revalidate, post-check=0, pre-check=0',
        'Content-Description' => 'File Transfer',        
        'Content-Disposition' => 'attachment; filename=' . $filename,
        'Expires' => '0',
        'Pragma' => 'public',
    ), $headers));
});

Route::get('users', function () {
  $users = Acme\Models\Users::get()->toArray();
  return Response::csv($users);
});