Often developer face this issue when try to use a interger number in where condition. So in this tutorial i am going to show you how to resolve this issue.
public function getblno($company_id){
$this->db->select('*');
$this->db->from('bill_of_lading');
$this->db->where('company_id',(int)$company_id);
$num_results = $this->db->count_all_results();
return $num_results;
}