如何选择最合适的 PHP 函数设计模式？

interface Strategy {  public function doSomething(): void;}class ConcreteStrategyA implements Strategy {  public function doSomething(): void {    echo "Doing something in strategy A";  }}class ConcreteStrategyB implements Strategy {  public function doSomething(): void {    echo "Doing something in strategy B";  }}class Context {  private $strategy;  public function __construct(Strategy $strategy) {    $this->strategy = $strategy;  }  public function doSomething(): void {    $this->strategy->doSomething();  }}// 实战案例$contextA = new Context(new ConcreteStrategyA());$contextA->doSomething(); // Doing something in strategy A$contextB = new Context(new ConcreteStrategyB());$contextB->doSomething(); // Doing something in strategy B

interface Beverage {  public function getDescription(): string;  public function cost(): float;}class Espresso implements Beverage {  public function getDescription(): string {    return "Espresso";  }  public function cost(): float {    return 1.99;  }}class Mocha implements Beverage {  private $beverage;  public function __construct(Beverage $beverage) {    $this->beverage = $beverage;  }  public function getDescription(): string {    return $this->beverage->getDescription() . ", Mocha";  }  public function cost(): float {    return $this->beverage->cost() + 0.20;  }}class Whip implements Beverage {  private $beverage;  public function __construct(Beverage $beverage) {    $this->beverage = $beverage;  }  public function getDescription(): string {    return $this->beverage->getDescription() . ", Whip";  }  public function cost(): float {    return $this->beverage->cost() + 0.10;  }}// 实战案例$beverage = new Espresso();echo $beverage->getDescription() . " $" . $beverage->cost() . ""; // Espresso $1.99$beverage2 = new Mocha($beverage);echo $beverage2->getDescription() . " $" . $beverage2->cost() . ""; // Espresso, Mocha $2.19$beverage3 = new Whip($beverage2);echo $beverage3->getDescription() . " $" . $beverage3->cost() . ""; // Espresso, Mocha, Whip $2.29

interface CreditCard {  public function getCreditCardNumber(): string;  public function getCVV(): string;  public function getExpirationDate(): string;}class VisaCreditCard implements CreditCard {  private $number;  private $cvv;  private $expirationDate;  public function __construct($number, $cvv, $expirationDate) {    $this->number = $number;    $this->cvv = $cvv;    $this->expirationDate = $expirationDate;  }  public function getCreditCardNumber(): string {    return $this->number;  }  public function getCVV(): string {    return $this->cvv;  }  public function getExpirationDate(): string {    return $this->expirationDate;  }}class MasterCardCreditCard implements CreditCard {  private $number;  private $cvv;  private $expirationDate;  public function __construct($number, $cvv, $expirationDate) {    $this->number = $number;    $this->cvv = $cvv;    $this->expirationDate = $expirationDate;  }  public function getCreditCardNumber(): string {    return $this->number;  }  public function getCVV(): string {    return $this->cvv;  }  public function getExpirationDate(): string {    return $this->expirationDate;  }}class CreditCardFacade {  private $creditCard;  public function __construct(CreditCard $creditCard) {    $this->creditCard = $creditCard;  }  public function makePayment($amount) {    // Perform payment logic using the credit card information    echo "Payment made using " . $this->creditCard->getCreditCardNumber();  }}// 实战案例$visaCard = new VisaCreditCard("4111111111111111", "123", "12/24");$masterCard = new MasterCardCreditCard("5555555555555555", "456", "11/25");$facade1 = new CreditCardFacade($visaCard);$facade1->makePayment(100); // Payment made using 4111111111111111$facade2 = new CreditCardFacade($masterCard);$facade2->makePayment(200); // Payment made using 5555555555555555