codeIgniter获取结果的问题

Question

I'm trying to display zipcode which only logged in user's area.

To get user's area, get_zipcode() calls get_area_name() .

But, there is 500 error if I get value from get_area_name() ;

If I commented out get_area_name() and put harded coded value $area ="ny" , it works.

I think there is some issue with get_area_name() .

table for " area " is following

CREATE TABLE IF NOT EXISTS `wn_area` (
  `area_id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `area` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
  PRIMARY KEY (`area_id`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=165 ;

Function

    public function get_zipcode($area_id)
    {
        $this->db->select("*");

        $this->db->from("zipcode");

        if ($area_id != "" )
        {
            $ar_area_ids = array(1,2,3,4,5,6,7,8);

            //$area = get_area_name($area_id);
            $area = "ny";

            if( in_array($area_id, $ar_area_ids) ){
                $this->db->like('sido', $area); 
            }else {
                $this->db->like('gugun', $area);
            }

        }else{  

            $this->db->like("sido", 'ny'); 
            $this->db->limit("10000");
        }


        $this->db->order_by("zipcode_id");

        $query = $this->db->get();

        return ($query->num_rows() > 0) ? $query->result() : FALSE;
    }

  public function get_area_name($area_id)
    {
        $this->db->select("*");

        $this->db->from("area");

     $this->db->where("area_id", $area_id);

        $query = $this->db->get();

        return $query->row()->area;

    }

Answer 1

since its class to call method from another method inside class , you need to use $this , like, change:

$area = get_area_name($area_id);

to

$area = $this->get_area_name($area_id);