全局变量未在PHP Codeigniter中更新

问题描述：

I want to update a global variable in my MVC application. I'm passing information via my global variable $foo but for some reason it is not updating the data in one of my functions in the class

How can I update the value of $foo inside my function?

My code:

class example extends CI_Controller {

    private $foo;

    public function __construct() {
        parent::__construct();
        $this->foo = 10;
    }

    public function index() {
        // some code here
        $this->foo = 20;
        $data['main_content'] = 'login_form';
        $this->load->view('includes/template', $data);
    }

    if($this->input->post()) {
       error_log($this->foo);
    }
}

It is returning 10 even though I am trying to update the value to 20

我想更新MVC应用程序中的全局变量。我通过我的全局变量$ foo code>传递信息但由于某种原因它没有更新类 code>中的 functions code>中的一个数据 p>

如何在函数中更新 $ foo code>的值？ p>

我的代码： p> \ n


 类示例扩展CI_Controller {
 
 private $ foo; 
 
公共函数__construct（）{
 parent :: __ construct（）; 
 $ this-＆gt; foo =  10; 
} 
 
公共函数索引（）{
 //这里的一些代码
 $ this-＆gt; foo = 20; 
 $ data ['main_content'] ='login_form'; 
 $  this-＆gt; load-＆gt; view（'includes / template'，$ data）; 
} 
 
 if（$ this-＆gt; input-＆gt; post（））{
 error_log（$ this-）  ＆gt; foo）; 
} 
} 
  code>  pre> 
 
 它正在返回 10  code>，即使我正在尝试将值更新为 20  code>  p> 
  div>

答

I'm not sure what you are doing here... but this works.

class Main extends CI_Controller {

    private $foo;

    public function __construct() {
        parent::__construct();
        $this->foo = 10;
    }

    public function index() {
        // some code here
        $this->foo = 20;
        echo $this->foo; // The result is 20 as set.
    }
    // hard coded the setter var name for demonstration purposes only
    public function set_foo($foo){
       $this->foo = $foo;
    }
    // hard coded the getter var name for demonstration purposes only
    public function get_foo(){
       return $this->foo;
    }

}

$foo is a "property" of the class which IS accessible to all of it's member "methods". It isn't a GLOBAL as you refer to it. GLOBALS are accessible to everything.

全局变量未在PHP Codeigniter中更新

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