php没有在静态函数内重载

<?php

class A {
    private $test = "TEST<br />";

    public static function getInstance() {
        return new self();
    }

    public static function someStaticMethod() {
        $a = new self();
        $a->test;
    }

    public function __get($args) {
        echo $this->$args;
    }
}

/* echo's "TEST" */
$a = new A();
$a->test;

/* echo's "TEST" */
$a2 = A::getInstance();
$a2->test;

/*
No output... eeerhm... how come?
Why is $a->test (inside someStaticMethod()) not being overloaded by __get ??
*/
A::someStaticMethod();

?>

PHP网站说(link)：

Property overloading only works in object context. These magic methods will not be triggered in static context. Therefore these methods should not be declared static. As of PHP 5.3.0,a warning is issued if one of the magic overloading methods is declared static.

但我认为他们试图说你应该宣布魔术方法是静态的.例如.：

public static function __get(){}

事实上,我实际上是在对象上下文中使用它. $a = new self();返回变量$a中A类的实例.然后我使用$a-> test(对象上下文imo？)来获取私有的“test”变量,而该变量又应该被重载…

我很迷惑…