php – 在codeigniter控制器中访问公共变量的值

有谁知道如何访问已由另一个函数更新的公共控制器变量的值？
代码示例
调节器

class MyController extends CI_Controller {

public $variable = array();

function  __construct() {
    parent::__construct();
}

function index(){
    $this->variable['name'] = "Sam";
    $this->variable['age'] = 19;
}

function another_function(){
    print_r($this->variable);
}

}

当我调用another_function()时,我得到一个空数组..可能是什么问题？
任何帮助将是apreciated ..

你必须使用构造函数,而不是index().

class MyController extends CI_Controller {

    public $variable = array();

    function  __construct() {
        parent::__construct();
        $this->variable['name'] = "Sam";
        $this->variable['age'] = 19;
    }

    function index(){

    }

    function another_function(){
        print_r($this->variable);
    }
    }

如果要调用index(),则调用another_function(),尝试使用CI session类.

class MyController extends CI_Controller {

public $variable = array();

function  __construct() {
    parent::__construct();
    $this->load->library('session');
    if ($this->session->userdata('variable')) {
        $this->variable = $this->session->userdata('variable');
    }
}

function index(){

    $this->variable['name'] = "Sam";
    $this->variable['age'] = 19;
    $this->session->set_userdata('variable',$this->variable);
}

function another_function(){
    print_r($this->variable);
}
        }