} class c extends p { public function cf() { parent::pf(); parent::cc(); $this->cc(); } public function cc() { echo 'in c-cc<br/>'; } } $c = new c(); $c->cf(); /* in p-pf in p-pp in o -cc in c-cc */ //父类中static变量,被子类继承。且共享。 class MyParent { protected static $variable; } class Child1 extends MyParent { function set() {