php – 匿名函数/关闭并使用self ::或static ::

我正在使用匿名函数,我在对象之外创建匿名函数,然后将其添加到稍后将使用__callStatic魔术函数的对象.正在添加的包含父类的方法的闭包.我想知道我是否能够从关闭中调用这些方法？

现在我得到这个错误：

EmptyObject::addMethod('open',function(){
    if (static::_hasAdapter(get_class(),__FUNCTION__))
            return self::_callAdapter(get_class(),__FUNCTION__,$details);

    echo '<p>You have mail!</p>';
});

抛出这个错误：

Fatal error: Cannot access static:: when no class scope is active in

和

//Add the functions
EmptyObject::addMethod('open',function(){
    if (EmptyObject::_hasAdapter('EmptyObject',__FUNCTION__))
            return EmptyObject::_callAdapter('EmptyObject',$details);

    echo '<p>You have mail!</p>';
});

抛出此错误是因为该方法受到保护

Fatal error: Uncaught exception ‘BadMethodCallException’ with message ‘Method ‘_hasAdapter’ was not found in class EmptyObject’

您可以使用 Closure::bind()(PHP> = 5.4.0)

abstract class EmptyObject
{
   protected static $methods = array();

   final public static function __callStatic($name,$arguments)
   {
      return call_user_func(self::$methods[$name],$arguments);
   }

   final public static function addMethod($name,$fn)
   {
      self::$methods[$name] = Closure::bind($fn,NULL,__CLASS__);
   }

   final protected static function protectedMethod()
   {
      echo __METHOD__ . " was called" . PHP_EOL;
   }
}

现在传递给EmptyObject :: addMethod()的任何匿名函数都将在EmptyObject类的范围内运行

EmptyObject::addMethod("test",function()
{
   self::protectedMethod();
});


// will output:
// EmptyObject::protectedMethod was called

EmptyObject::test();

原文地址：https://www.jb51.cc/php/131381.html