关于PHP5.4的closure

参考： http://us.php.net/manual/en/closure.bind.php

有如下测试：

<?php
class A {
    private static $sfoo = 1;
    private $ifoo = 2;
}
$cl1 = static function() {
    return A::$sfoo;
};
$cl2 = function() {
    return $this->ifoo;
};

$bcl1 = Closure::bind($cl1, null, 'A');
$bcl2 = Closure::bind($cl2, new A(), 'A');
echo $bcl1(), "\n";
echo $bcl2(), "\n";

<?php

class A {

private static $sfoo = 1;

private $ifoo = 2;

}

$cl1 = static function() {

return A::$sfoo;

};

$cl2 = function() {

return $this->ifoo;

};

$bcl1 = Closure::bind($cl1, null, 'A');

$bcl2 = Closure::bind($cl2, new A(), 'A');

echo $bcl1(), "\n";

echo $bcl2(), "\n";

上述代码说明：通过Closure的bind方法是可以访问一个对象的private属性的；这个是不是有悖于程序设计原则？

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