This article mainly introduces the interaction between controller and view in yii actual combat. It has certain reference value. Now I share it with you. Friends in need can refer to it.

Following the previous article on the beginning of yii actual combat Seeing the clues, this article will explain the basic usage of controllers and views. And build a character list page

Default Controller

By default, when the browser requests http://frontend.test/, what is actually accessed is actionIndex method of frontend/controllers/SiteController.php, we test the breakpoint of this method:

public function actionIndex()
{
    return "你是不是默认的控制器? 如果是，就输出来";
    return $this->render('index');
}

Note: The method name should be prefixed with action. , and use the camel case method

Browser results:

The default controller is controlled by the defaultRoute attribute, the source code is at:\yii\ web\Application::$defaultRoute, you can specify a custom default controller in the configuration file

Add in common/config/main.php:

'defaultRoute' => 'index',

At this point, when you visit the homepage again, a 404 error will be reported:

Because we specified the default controller as index, but did not create the corresponding file, next we use the gii component of yii to generate the control server file.

Open the terminal, enter the root directory, and execute: php yii gii/controller --controllerClass=frontend\\controllers\\IndexController --viewPath=@frontend/views/index

As you can see, the program automatically generated two files for us, frontend/controllers/IndexController.php and frontend/views/index/index.php

php yii help gii

gii is Yii's automatic code generation tool. It can be generated on a web page or on the command line. Most programmers prefer the command line. I’m not sure how to use it now, but it doesn’t matter. I’ll first understand the existence of this function. I’ll explain gii separately later

• The controller transmits the character list data to the view file

• View file displays data in a table

frontend/controllers/IndexController.php, and transfer the array to the view

public function actionIndex()
{
    $people = [
        ['name' => '曹操', 'saying' => '宁教我负天下人，不教天下人负我'],
        ['name' => '刘备', 'saying' => '备若有基业，天下碌碌之辈，诚不足虑也。'],
        ['name' => '关羽', 'saying' => '此等小辈，如同土鸡瓦狗，插标卖首尔'],
        ['name' => '张飞', 'saying' => '我乃燕人张翼德，谁敢与我决一死战'],
    ];
    return $this->render('index', ['people' => $people]);
}

renderThe first parameter is the view file name. The default path is: current application/views/controller name/view name. The corresponding path is: frontend/views/index/ index.php; The second parameter is the data the controller wants to send to the view.

frontend/views/index/index.php

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