php - 在构造函数之后设置类常量？

Question

我有一个具有以下模式的类

class MyClass
{
   const x = 'abc';
   const y = '123';

   function _contruct() {}
}

有什么方法可以让常量在类主体中保持未设置状态，并在调用构造函数后动态设置？例如这样的事情:

class MyClass
{
   const x;
   const y;

   function _contruct()
   {
      $this->setStuff();
   }

   function setStuff()
   {
     $this->x = Config::getX();
     $this->y = Config::getY();
   }
}

Answer 1

As the name suggests, that value cannot change during the execution of the script (except for magic constants, which aren't actually constants) (http://php.net/manual/en/language.constants.php)

所以，不。您可以将它们设为私有(private)变量。