Question

How to use multilevel inheritance in PHP

Answer 1

class A {
    public function print_a() {
        return  'class A' . "<br />";
    }
}
class B extends A {    
    public function print_b() {
        return  'class B extends A' . "<br />";
    }
}
class C extends B {
    public function print_c() {
        return  'class C extends B' . "<br />";
    }
    public function print_all() {
        echo $this->print_a();
        echo $this-> print_b();
        echo $this->print_c();
    }
}

$obj = new C();

$obj->print_all();    


/*
run:

class A
class B extends A
class C extends B

*/

 

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