How to enable/disable following a link from a specific page?

Question

Yii

Hi friends!
Task: It is necessary to allow visiting the target page A only by clicking on the links located on a specific page B. That is, so that by a direct link in the browser line, a link located outside of a specific page B, it was impossible to go to page A, but to do, for example, a redirect back or to the main page or something else - for example, connect your action.
There are thoughts on how to implement this, but I would like to see the correct way. Friends, how to drink it?

Answer 1

When a link is clicked, write isLisnkClicked = 1 to the session. Then

/* 
тут храняться как страницы, те от которых зависит показ какой то страницы, 
так и зависимые страницы. name это /module/controller/action 
*/

user_available_pages table to see if the page is available to the user.
You can also check for cookies.

Answer 2

Good afternoon.
Check which page you came from and if it matches, then redirect where you need it.
You can do such a check in beforeAction.

Answer 3

When entering page B, write a variable to the cookie or session, when going to page A, check for the presence of this variable.

Answer 4

Friends, and so:
In parallel, I posted here yiiframework.ru/forum
Two weeks have passed, and here and there there is no unequivocal opinion on how to implement this functionality. I solved the issue like this:

<?php
    
namespace app\controllers;

use Yii;
use yii\web\Controller;

class MainController extends Controller
{
    public function init()
    {
        parent::init();
        
        $this->__TOKEN();
    }

    public function mainToken( $token = null )
    {
        $session = $this->openSession();

        if ( isset($token) )
        {
            $_SESSION['__TOKEN'][0] = $token;
            $_SESSION['__TOKEN'][1] = 0;
        }
        
        return $_SESSION['__TOKEN'][0];
    }
    
    public function openSession()
    {
        $session = Yii::$app->session;
        if ( !$session->isActive ) $session->open();

        return $session;
    }    
    
    protected function __TOKEN()
    {
        $session = $this->openSession();

        isset ($_SESSION['__TOKEN'][1] ) ? $_SESSION['__TOKEN'][1]++ : $_SESSION['__TOKEN'][1] = 0;

        if ( $_SESSION['__TOKEN'][1] > 1 )
        {
            $_SESSION['__TOKEN'][0] = null;
            $_SESSION['__TOKEN'][1] = 0;
        }    
    }
}

$this->mainToken() - read the token;
$this->mainToken('string') - write the token;
The life cycle of mainToken is 1 request, whether we have read the token or not, the token will be cleared.
From MainController, you can extend and build further application logic. Something like this...