PHP

codeigniter 3 update

$data = array(
        'title' => $title,
        'name' => $name,
        'date' => $date
);

$this->db->where('id', $id);
$this->db->update('mytable', $data);

codeigniter update or create

   $this->db->where('user_id',$id);
   $q = $this->db->get('profile');

   if ( $q->num_rows() > 0 ) 
   {
      $this->db->where('user_id',$id);
      $this->db->update('profile',$data);
   } else {
      $this->db->set('user_id', $id);
      $this->db->insert('profile',$data);
   }

update codeigniter

$this->db->set('fieldname', 'value');
$this->db->where('id', 2);
$this->db->update('tablename');