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);
   }

Source: stackoverflow.com

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