php - 如何从不完整的类(class)中获取类(class)名称？

Question

我们有一个抛出错误的错误处理程序:__PHP_Incomplete_Class 无法转换为字符串。

错误处理程序当前执行“is_object”测试，奇怪的是，对于“不完整”对象，该测试为假。我正在尝试调整错误处理程序，但我无法在不解析重新序列化版本的情况下获取原始类名。

<?php

$o = 'O:14:"BogusTestClass":0:{}';

$c = unserialize($o);

var_dump(
    array(
        'subject' => $c,
        'is_object' => is_object($c), // false !?!?
        'get_class' => get_class($c), // __PHP_Incomplete_Class
        'gettype' => gettype($c),     // 'object'
        'Is instance of?' => $c instanceof __PHP_Incomplete_Class, // true
        'serial' => serialize($c),
    )
);    

// Tried:

var_dump($c->__PHP_Incomplete_Class_Name);
// Error:
//   The script tried to execute a method or access a property of
//   an incomplete object


$refObj = new ReflectionObject($c);
$refProp = $refObj->getProperty('__PHP_Incomplete_Class_Name');
$refProp->setAccessible(true);
var_dump($refProp->getValue($c));
// Error:
//   ReflectionProperty::getValue(): The script tried to execute a
//   method or access a property of an incomplete object.


// This works, but is fragile, since it depends on internal behavior
// of serialize
function getBadClassName($subject)
{
    $serial = serialize($subject);
    $parts  = explode(':', $serial, 4);

    if ('O' === $parts[0] && strlen($parts[2]) -2 == $parts[1]) {
        return substr($parts[2], 1, -1);
    }
    return '-- Error --';
}

var_dump(getBadClassName($c));

试图从不完整的对象中获取序列化类的名称以用于错误消息。

避免解析字符串，因为我猜测当使用重新定义序列化/反序列化的扩展时，字符串解析会崩溃，例如 http://pecl.php.net/package/igbinary或 http://pecl.php.net/package/APC/3.1.7 apc.serializer 钩子(Hook)。

Answer 1

根据建议来看

forcing access to __PHP_Incomplete_Class object properties

可以通过 foreach 和 ArrayObject 访问该属性

<?php

$array = new \ArrayObject($object);
var_dump($array['__PHP_Incomplete_Class_Name']);