Using property in another method in same class in different HTTP requests

I’m new to OOP in php and I’ve the following issue.
Basically I’ve visit form which submitted data to create action in the controller.. after that it’s redirect to success action which outputting visit counter depend on submitted data.

My question now is how I can store posted data inside a property in create method then use it in success method ?

Maybe I didn’t explain my issue very well for that please check my code below:

addvisit.php

public function createAction()
    {
        $visit = new Visit($_POST);
        $plate = $_POST['plate'];

        if ($visit->save()) {
            
            $this->redirect('/AddVisit/success');

        } else {

            View::renderTemplate('Visits/new.html', [
                'visit' => $visit
            ]);

        }
    }

    public function successAction()
    {
        $visit = new Visit();
        $visit->countVisit($this->createAction()->plate);

        View::renderTemplate('Visits/success.html', [
                'visit' => $visit
            ]);
    }

I’m trying also to use return in create method like below but it’s didn’t work:

public function createAction()
    {
        $visit = new Visit($_POST);
        $plate = $_POST['plate'];

        if ($visit->save()) {
            
            $this->redirect('/AddVisit/success');
            return $plate;

FYI this is also countVisit method in my model:

public function countVisit($plate)
    {
        $count = static::findCar($plate);

        // Visit less than required qty for free
        if ($this->subscribe->isMember($plate)) {
            $remain = $this->subscribe->isMember($plate)->subscribe_qty;
            echo "Remainnig visit <h3>$remain</h3>";
        } elseif ($count->qty >= 3) {
            $this->resetCount($plate);
            echo "<h3>You got a free visit</h3>";
        } else {
            $current = $count->qty;
            echo "This is the visit number <h3>$current</h3>";
        }

    }

I didn’t put the full code and trying to focus on my problem part.

Thank you.