add post data to an array in controller and output from view with Codeigniter

I have the following syntax:

Contoller

  function new_auto_spread_details() 
  {
      $postinfo = array();
      $postinfo[] = $this->input->post('customer')
      $postinfo[] = $this->input->post('period')      
      $this->load->view('sales/new_autospread_order_lines',$postinfo);
  }

View

<?php echo $postinfo['customer']; ?>
<?php echo $postinfo['period']; ?>

This does not output anything. it seems that adding $this->input->post('customer') to the array postinfo is not correct.

How do I correctly add this information to the postinfo array and call it from the view?

function new_auto_spread_details() 
  {
      $postinfo = array();
      $data['postinfo']['customer'] = $this->input->post('customer');
      $data['postinfo']['period'] = $this->input->post('period');     
      $this->load->view('sales/new_autospread_order_lines',$data);
  }

on view

<?php echo $postinfo['customer']; ?>
<?php echo $postinfo['period']; ?>