codeigniter return last inserted id code example

Example 1: return last insert id in codeigniter

$id = $this->db->insert_id();

Example 2: codeigniter return last inserted id

$this->db->insert('posts', $post_data);
   $insert_id = $this->db->insert_id();
   return  $insert_id;

Example 3: codeigniter last insert id

$last_inserted_id = $this->db->insert_id();