VBO export csv

function modulenameaction_info() {
    'modulenameexport_action' => array(
      'type' => 'user',
      'label' => t('Export User operations'),
      'configurable' => FALSE,
      'aggregate' => TRUE, //see modulenameexport_action param $users
      'triggers' => array('user_update'),
    ),
  );
}
 
function modulenameviews_bulk_operations_form_alter(&$form, &$form_state, $vbo) {
  if ($form_state['step'] == 'views_bulk_operations_confirm_form' && $form_state['operation']->operationId == 'action::modulenameexport_action') {
    $form['actions']['submit']['#value'] = 'Export these users';
    $form['actions']['cancel']['#title'] = 'Exit';
  }
}  
 
function modulenameexport_action(&$users, $context = array()) {
  modulenameexport_bs_data($users);
}
 
function modulenameexport_bs_data($users) {
  $count = 0;
  $data = array();
  foreach ($users as $user) {
    $data[$count][] = $user->uid;
    $data[$count][] = $user->mail;
    $data[$count][] = empty($user->field_xxx[LANGUAGE_NONE][0]['value'])?"":$user->field_xxx[LANGUAGE_NONE][0]['value'];
    // multiple values
    $loc_str = '';
    if (!empty($user->field_location[LANGUAGE_NONE])) {
      foreach ($user->field_location[LANGUAGE_NONE] as $loc_key => $loc_val) {
        $loc_arr[] = $loc_val['postal_code'] . ' ' . $loc_val['street']  . ' ' . $loc_val['city'] . ' ' . $loc_val['province'] . ' ' . $loc_val['country'];
      }
      if (!empty($loc_arr)) {
        $loc_str = implode (' | ', $loc_arr);
      }
    }
    $data[$count][] = $loc_str;
    $count++;
  }
 
  $header = array('uid','field xxx','multiple values location string');
  $output ='';
  foreach($header as $k => $v) {
    $output .= $v.',';
  }
  $output .= "\r\n";
 
  for($i=0 ; $i<count($data);$i++) {
    foreach($data[$i] as $k => $v) {
      $output .= str_replace(array("\r\n","\n\r", "\r", "\n" ,"\t","\"","'" ,","), ' ',$v) . ',';
    }
    $output .= "\r\n";
  }
  $filename =  'bs_data_export' . time() . '.csv';
 
  header('Content-type: text/csv;charset=utf-8');
  header('Content-disposition: attachment; filename='.$filename);
  echo "\xEF\xBB\xBF".$output;
  exit;
}