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多態(tài)是面向?qū)ο缶幊痰闹匾拍钪唬軌蛱岣叽a的靈活性和可維護(hù)性。在PHP中,多態(tài)可以通過繼承和接口來實(shí)現(xiàn)。下面是PHP多態(tài)面向?qū)ο缶幊痰倪M(jìn)階之路:
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
通過繼承和接口,PHP多態(tài)面向?qū)ο缶幊痰倪M(jìn)階之路可以更好地實(shí)現(xiàn)代碼的靈活性和可維護(hù)性。希望以上內(nèi)容對(duì)您有所幫助。
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