多态是面向对象编程的重要概念之一,它能够提高代码的灵活性和可维护性。在PHP中,多态可以通过继承和接口来实现。下面是PHP多态面向对象编程的进阶之路:
class Animal {
public function makeSound() {
echo "Animal makes sound";
}
}
class Dog extends Animal {
public function makeSound() {
echo "Dog barks";
}
}
class Cat extends Animal {
public function makeSound() {
echo "Cat meows";
}
}
$dog = new Dog();
$cat = new Cat();
$dog->makeSound(); // Output: Dog barks
$cat->makeSound(); // Output: Cat meows
interface Shape {
public function calculateArea();
}
class Circle implements Shape {
private $radius;
public function __construct($radius) {
$this->radius = $radius;
}
public function calculateArea() {
return 3.14 * $this->radius * $this->radius;
}
}
class Square implements Shape {
private $side;
public function __construct($side) {
$this->side = $side;
}
public function calculateArea() {
return $this->side * $this->side;
}
}
$circle = new Circle(5);
$square = new Square(5);
echo $circle->calculateArea(); // Output: 78.5
echo $square->calculateArea(); // Output: 25
通过继承和接口,PHP多态面向对象编程的进阶之路可以更好地实现代码的灵活性和可维护性。希望以上内容对您有所帮助。
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