flow pattern

PaymentCheckout.php

<?php

interface Flow
{
    public function execute();
}

class PaymentCheckout implements Flow
{
    public function __construct($manadtoryParameters)
    {
    }
    
    public function tokenize()
    {
    }
    
    public function saveCard()
    {
    }
    
    public function charge()
    {
    }
    
    public function redirect()
    {
    }
    
    public function error()
    {
    }
    
    public function execute()
    {
        if (!$this->saveCard()) {
            return $this->error();
        }

        if (!$this->tokenize()) {
            return $this->error();
        }
        
        if (!$this->charge()) {
            return $this->error();
        }

        if (!$this->redirect()) {
            return $this->error();
        }
    }
}


(new PaymentCheckout($user, $card, $payment))->execute();