PHP extends 继承 覆写方法

[php]代码库

class Bar 
{
    public function test() {
        $this->testPrivate();
        $this->testPublic();
    }
    public function testPublic() {
        echo "Bar::testPublic\n";
    }
    private function testPrivate() {
        echo "Bar::testPrivate\n";
    }
}
class Foo extends Bar 
{
    public function testPublic() {
        echo "Foo::testPublic\n";
    }
    private function testPrivate() {
        echo "Foo::testPrivate\n";
    }
}
$myFoo = new Foo();
$myFoo->test(); 
// 运行结果
// Bar->testPrivate 
// Foo->testPublic