写个最简单的程序试试就知道了,结果是:的确如此 <!-- about extends --> <?php class A { private $a = 5; public function shuchuA() { return $this->a; } } class B extends A {} class C extends B {} class D extends C {}$b = new B(); $c = new C(); $d = new D();echo $b->shuchuA(); echo $c->shuchuA(); echo $d->shuchuA(); ?>
<!-- about extends -->
<?php
class A {
private $a = 5;
public function shuchuA() {
return $this->a;
}
}
class B extends A {}
class C extends B {}
class D extends C {}$b = new B();
$c = new C();
$d = new D();echo $b->shuchuA();
echo $c->shuchuA();
echo $d->shuchuA();
?>