修改 PHP 对象属性名称

Question

在 PHP 中是否可以更改对象属性键/名称？例如：

stdClass Object
(
     [cpus] => 2
     [created_at] => 2011-05-23T01:28:29-07:00
     [memory] => 256
)

我希望将对象中的键 created_at 更改为 created ，留下一个如下所示的对象：

stdClass Object
(
     [cpus] => 2
     [created] => 2011-05-23T01:28:29-07:00
     [memory] => 256
)

Answer 1

$object->created = $object->created_at;
unset($object->created_at);

不过，适配器类之类的东西可能是更可靠的选择，具体取决于需要执行此操作的位置和频率。

class PC {
    public $cpus;
    public $created;
    public $memory;

    public function __construct($obj) {
        $this->cpus    = $obj->cpu;
        $this->created = $obj->created_at;
        $this->memory  = $obj->memory;
    }
}

$object = new PC($object);

Answer 2

不，因为键是对值的引用，而不是值本身。
您最好复制原件，然后将其删除。

$obj->created = $obj->created_at;
unset(obj->created_at);

Answer 3

它类似于 @deceze 适配器，但不需要创建额外的类

$object = (object) array(
  'cpus'    => $obj->cpus,
  'created' => $obj->created_at,
  'memory'  => $obj->memory
);