How to access a variable of a function from an another function?

Question

I need a help with codeigniter, I have in controller in public function index() this

$data['book'] = $this->db->query(*something*)->result();

and it's normally working but when I want to use it in other function. for example in public function bookshelf() it wrote me "variable $data seems to be unused in it's scope" and it's not working

How do I use $data from bookshelf() function ?

edit: It's working now.

Answer 1

设置和获取时，与$this

$this->data['book'] = $this->db->query(*something*)->result();

Answer 2

create a search function

public function Search ($query){
        return $this->db->query($query)->result();
    }

use it anywhere

public function index(){
        $data['search'] = $this -> Search ("%query%");
    }