对于下面的代码，为什么更新了myObj的propB？为什么test.childObj没有自己的属性propB？varmyObj={propA:'',propB:[]}varfatherObj={childObj:null,init:function(){this.childObj=Object.create(myObj);this.childObj.propA='A';this.childObj.propB.push(2);}}vartest=Object.create(fatherObj);test.init();console.log(myObj.propB.length);con

我有如下父类和子类:abstractclassParentObj{private$data;publicfunction__construct(){$this->data=array(1,2,3);var_dump($this->data);$this->method();}publicfunctionmethod(){echo"ParentObj::method()";}}classChildObjextendsParentObj{publicfunction__construct(){parent::__construct();var_dump($this->data);}publ