我是OO PHP的新手.有一些问题.
class a {
protected function a1 (){
...
}
}
class b extends a {
public function b1(){
...
}
}
class a {
var $b;
function __construct()
{
$b= new b();
}
protected function a1 (){
$b->b1();
}
}
class b extends a {
public function b1(){
...
}
}
我知道,可以从扩展类调用父类的方法,但我想知道是否可以采用反向方式?我的意思是,从父类内部调用扩展类方法(在这种情况下,类b中的类b的方法)而不在__contruct中声明,只需通过$this-> b();?
解决方法:
<?PHP
class a
{
public function a1 ()
{
$this->b1();
}
protected function b1()
{
echo 'This is in the a class<br />';
}
}
class b extends a
{
protected function b1()
{
echo 'This is in the b class<br />';
}
}
class c extends a
{
protected function b1()
{
echo 'This is in the c class<br />';
}
}
$a = new a();
$a->a1();
$b = new b();
$b->a1();
$c = new c();
$c->a1();
?>
这将导致:
This is in the a class
This is in the b class
This is in the c class
您可能也对抽象类http://us3.php.net/manual/en/language.oop5.abstract.php感兴趣