PHP是一种面向对象的编程语言,可以通过继承、接口和抽象类来实现多态性行为。以下是在PHP中实现多态性行为的途径:
class Animal {
public function makeSound() {
echo "Animal makes sound";
}
}
class Dog extends Animal {
public function makeSound() {
echo "Dog barks";
}
}
$animal = new Dog();
$animal->makeSound(); // 输出:Dog barks
interface Shape {
public function calculateArea();
}
class Circle implements Shape {
public function calculateArea() {
echo "Calculating area of circle";
}
}
class Rectangle implements Shape {
public function calculateArea() {
echo "Calculating area of rectangle";
}
}
$shape = new Circle();
$shape->calculateArea(); // 输出:Calculating area of circle
abstract class Vehicle {
abstract public function start();
}
class Car extends Vehicle {
public function start() {
echo "Car is starting";
}
}
class Bike extends Vehicle {
public function start() {
echo "Bike is starting";
}
}
$vehicle = new Car();
$vehicle->start(); // 输出:Car is starting
通过以上途径,可以实现PHP中的多态性行为,使代码更加灵活和可扩展。
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