Php 强制父方法处理子类值
假设以下代码: 示例_1Php 强制父方法处理子类值,php,oop,inheritance,prototypal-inheritance,Php,Oop,Inheritance,Prototypal Inheritance,假设以下代码: 示例_1 class Parent_Class {} class Child_Class extends Parent_Class { public $class_name; public function __construct() { $this->class_name = get_class(); } } $child_instance = new Child_Class(); echo $child_instance->
class Parent_Class {}
class Child_Class extends Parent_Class {
public $class_name;
public function __construct() {
$this->class_name = get_class();
}
}
$child_instance = new Child_Class();
echo $child_instance->class_name;
/// output will be :
/// Child_Class
然而,在这里:
示例2
class Parent_Class {
public $class_name;
public function __construct() {
$this->class_name = get_class();
}
}
class Child_Class extends Parent_Class {
public $class_name;
}
$child_instance = new Child_Class();
echo $child_instance->class_name;
/// output will be:
/// Parent_Class
问题:
如何实现示例2中示例1的输出,即:
如何强制父构造函数方法始终查找子类名 您可以使用
get\u called\u class()
而不是get\u class()
:
有关更多信息:
class Parent_Class
{
public function __construct()
{
$this->class_name = get_called_class();
}
}