json_encode PHP对象及其受保护的属性 [英] json_encode PHP objects with their protected properties
问题描述
有什么方法可以设置PHP对象,以便当我尝试将其转换为JSON时,将显示其所有受保护的属性?
Is there any way I can set up PHP objects so that when I try to convert them to JSON, all of their protected properties will be shown?
我阅读了其他答案,暗示我向对象添加了toJson()
函数,但这可能对我没有很大帮助.在大多数情况下,我有一个对象数组,并对数组本身执行编码.
I have read other answers suggesting I add a toJson()
function to the object, but that may not really help me a great lot. In most cases, I have an array of objects and I perform the encode on the array itself.
$array = [
$object1, $object2, $object3, 5, 'string', $object4
];
return json_encode($array);
是的,我可以遍历此数组并在具有此方法的每个元素上调用toJson()
,但这似乎并不正确.有没有办法我可以使用魔术方法来实现这一目标?
Yes, I can loop through this array and call toJson()
on every element that has such method, but that just doesn't seem right. Is there a way I can use magic methods to achieve this?
推荐答案
您可以实现类中的JsonSerializable
接口,因此您可以完全控制它的序列化方式.您还可以创建 Trait
,以防止复制粘贴序列化方法:
You can implement the JsonSerializable
interface in your classes so you have full control over how it is going to be serialized. You could also create a Trait
to prevent copy pasting the serializing method:
<?php
trait JsonSerializer {
public function jsonSerialize()
{
return get_object_vars($this);
}
}
class Foo implements \JsonSerializable
{
protected $foo = 'bar';
use JsonSerializer;
}
class Bar implements \JsonSerializable
{
protected $bar = 'baz';
use JsonSerializer;
}
$foo = new Foo;
$bar = new Bar;
var_dump(json_encode([$foo, $bar]));
或者,您可以使用 reflection 来完成您想要的事情:
Alternatively you could use reflection to do what you want:
<?php
class Foo
{
protected $foo = 'bar';
}
class Bar
{
protected $bar = 'baz';
}
$foo = new Foo;
$bar = new Bar;
class Seriailzer
{
public function serialize($toJson)
{
$data = [];
foreach ($toJson as $item) {
$data[] = $this->serializeItem($item);
}
return json_encode($data);
}
private function serializeItem($item)
{
if (!is_object($item)) {
return $item;
}
return $this->getProperties($item);
}
private function getProperties($obj)
{
$rc = new ReflectionClass($obj);
return $rc->getProperties();
}
}
$serializer = new Seriailzer();
var_dump($serializer->serialize([$foo, $bar]));
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