php - ReflectionException "Cannot access non-public member"，但属性可访问？

Question

我正在以这种方式更改我的反射类的可访问标志:

protected function getBaseSubscriptionPeriodReflection()
{
    $reflection = new \ReflectionClass('Me\Project\Class');

    // Make all private and protected properties accessible
    $this->changeAccessibility($reflection, true);

    return $reflection;
}

protected function changeAccessibility(\ReflectionClass $reflection, $accessible)
{
    $properties = $reflection->getProperties(\ReflectionProperty::IS_PRIVATE
        | \ReflectionProperty::IS_PROTECTED);

    foreach($properties as $property) {
        $property->setAccessible($accessible);
    }
}

但是当我尝试设置 firstDate 属性值时，出现异常:

ReflectionException : Cannot access non-public member Me\Project\Class::firstDate.

这里是异常的来源(setValue() 方法):

$reflection = $this->getBaseSubscriptionPeriodReflection();
$this->getSubscriptionPeriod($reflection)

protected function getSubscriptionPeriod(\ReflectionClass $reflection)
{
    $period = $reflection->newInstance();

    // Reflection exception here
    $reflection->getProperty('firstDate')->setValue($period, 'foo');

    return $period;
}

Answer 1

好的，找到问题了。似乎每次调用 getProperty 都会返回一个新实例。所以忘记了 changeAccessibility 方法，你应该这样做:

protected function getSubscriptionPeriod(\ReflectionClass $reflection)
{
    $period = $reflection->newInstance();

    $firstDateProperty = $reflection->getProperty('firstDate');
    $firstDateProperty->setAccessible(true);
    $firstDateProperty->setValue($period, 'foo');

    return $period;
}