Inheritance in OOP

Inheritance in OOP — a practical guide to inheritance OOP with clear examples you can reuse in real projects.

OOP Tutorial Series (16/65). Prefer one article? Read the complete OOP tutorial.

Short description

Inheritance models “is-a” relationships (Dog is an Animal). Prefer composition when “has-a” fits better.

extends

class Animal {
    public function speak(): string { return '...'; }
}
class Dog extends Animal {
    public function speak(): string { return 'Woof'; }
}