php - 在 PHP 中将类的静态成员编码为 JSON

Question

我有以下代码。

class SomeClass
{
    public static $one = 1;
    private static $two = 2;
    public $three = 3;
    private $four = 4;
}

header("Content-Type: application/json");
echo json_encode(new SomeClass());

我想要实现的是将公共(public)类属性和成员编码为 JSON 对象。我的问题是 json_encode() 忽略 public static $one = 1; 结果将是:

{
    "three": ​3
}

虽然我希望它也打印公共(public)静态成员，例如:

{
    "one": 1,
    "three": ​3
}

PHP 中的静态成员可以进行 JSON 编码吗？

Answer 1

根据PHP manual :

Static properties cannot be accessed through the object using the arrow operator ->.

这意味着不

尽管如此，我还是利用 Reflections 提出了解决方案:

class SomeClass
{
    public static $one = 1;
    private static $two = 2;
    public $three = 3;
    private $four = 4;
}

$reflection = new ReflectionClass('SomeClass');
$instance = $reflection->newInstance();
$properties = $reflection->getProperties(ReflectionProperty::IS_PUBLIC);

$jsonArray = array();

foreach($properties as $property) {
    $jsonArray[$property->getName()] = $property->getValue($instance);
}

echo json_encode($jsonArray);

结果是

{"one":1,"three":3}