duanjiu1894
2016-10-09 21:49
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全局变量未在PHP Codeigniter中更新

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

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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 传递信息但由于某种原因它没有更新中的 functions 中的一个数据

如何在函数中更新 $ foo 的值?

我的代码: \ n

 类示例扩展CI_Controller {
 
 private $ foo; 
 
公共函数__construct(){
 parent :: __ construct(); 
 $ this-> foo =  10; 
} 
 
公共函数索引(){
 //这里的一些代码
 $ this-> foo = 20; 
 $ data ['main_content'] ='login_form'; 
 $  this-> load-> view('includes / template',$ data); 
} 
 
 if($ this-> input-> post()){
 error_log($ this-)  > foo); 
} 
} 
   
 
 

它正在返回 10 ,即使我正在尝试将值更新为< 代码> 20

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1条回答 默认 最新

  • doumao1519 2016-10-09 22:29
    最佳回答

    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.

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