Yii 从控制器传递变量到视图不起作用

Question

我想将变量从控制器传递给视图，但它不起作用...

在控制器中

    class RegisterController extends Controller
{
    public function actionRegisterPage() 
    {
        // This function I have put it on url manager.
        // And I tried at here worked fine
        $util = new Utility();              
        $util->detectMobileBrowser();   
        $util->checkWebSiteLanguageInCookies(); 
        $this->layout = "masterLayout";
        $this->render('index');
    }
    public function actionSignIn(){

        if(blablabla){
            // Here is for me to display certain message, so I pass wish to pass $ERROR_USERNAME_INVALID to View
           $ERROR_USERNAME_INVALID = "ERROR_USERNAME_INVALID";

           $this->render('index',array('ERROR_USERNAME_INVALID'=>$ERROR_USERNAME_INVALID));
        }
    }

}

可见

<?php echo $ERROR_USERNAME_INVALID; ?>

错误

未定义变量：ERROR_USERNAME_INVALID

还尝试在控制器public $ERROR_USERNAME_INVALID = "ERROR_USERNAME_INVALID"; 和echo 在视图中声明...仍然未定义变量：ERROR_USERNAME_INVALID

有什么建议可以将变量传递给视图吗？谢谢

Answer 1

这招奏效了

if 条件中给出的值被视为常量变量。所以如果不工作 所以你必须添加传递它作为一个字符串 blablabla 到"blablabla"

否则

1==1 或任何有效条件

public function actionSignIn(){

    if("blablabla"){   // Write value as string ("" in double quotes) other remove condition if not required

       $ERROR_USERNAME_INVALID = "ERROR_USERNAME_INVALID";

       $this->render('index',array('ERROR_USERNAME_INVALID'=>$ERROR_USERNAME_INVALID));
    }
}

---

或者像下面这样尝试

在控制器中

public function actionSignIn(){

       $my_var = "My Custom Value";

       $this->render('index',array('my_var'=>$my_var));
    }
}

在视图中

echo $my_var;