php策略模式(strategy pattern)

。。。

php
/*
The strategy pattern defines a family of algorithms, each of which is encapsulated
and made interchangeable with other members within that family.
*/

interface PaymentStrategy {
    public function pay($amount);
}

class StripePayment implements PaymentStrategy {
    public function pay($amount) {
        echo 'StripePayment.
';
    }
}

class PayPalPayment implements PaymentStrategy {
    public function pay($amount) {
        echo 'PayPalPayment.
';
    }
}

class Checkout {
    private $amount;
    
    public function __construct($amount) {
        $this->amount = $amount;
    }
    
    public function capturePayment() {
        if ($this->amount > 99.99) {
            $payment = new PayPalPayment();
        } else {
            $payment = new StripePayment();
        }
        
        $payment->pay($this->amount);
    }
}

$checkout = new Checkout(49.99);
$checkout->capturePayment();

$checkout = new Checkout(149.99);
$checkout->capturePayment();

?>

转载于:https://www.cnblogs.com/aguncn/p/11185868.html