我可以通过 Reflection 获取私有财产的价值吗?

2021-12-26 00:00:00 reflection php

它似乎不起作用:

$ref = new ReflectionObject($obj);

if($ref->hasProperty('privateProperty')){
  print_r($ref->getProperty('privateProperty'));
}

它进入IF循环，然后抛出一个错误:

It gets into the IF loop, and then throws an error:

属性 privateProperty 不存在

Property privateProperty does not exist

:|

$ref = new ReflectionProperty($obj, 'privateProperty') 也不起作用...

文档页面列出了一些常量，包括 IS_PRIVATE.如果我无法访问私有财产，我怎么能使用它呢?

The documentation page lists a few constants, including IS_PRIVATE. How can I ever use that if I can't access a private property lol?

推荐答案

class A
{
    private $b = 'c';
}

$obj = new A();

$r = new ReflectionObject($obj);
$p = $r->getProperty('b');
$p->setAccessible(true); // <--- you set the property to public before you read the value

var_dump($p->getValue($obj));

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