Answers for "rows in codeigniter"

codeigniter count rows

$this->db
  ->where(['field'=>'foo'])
  ->from("tablename")
  ->count_all_results();

//OR 
$this->db
  ->where(['field'=>'foo'])
  ->count_all_results("tablename");

get single row in codeigniter

$query = $this->db->get();
$ret = $query->row();
return $ret->campaign_id;