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@ 2023-12-30T00:18:11Z

<?php

// オブジェクトの不要なプロパティを削除
function removeUnwantedProperties(mixed $element): mixed
{
    if (is_array($element)) {
        foreach ($element as $key => $val) {
            if ($key !== "\0*\0" && is_object($val)) {
                $element[$key] = removeUnwantedProperties($val);
            }
        }
    } elseif (is_object($element)) {
        $rc = new ReflectionClass($element);
        $properties = $rc->getProperties();
        foreach ($properties as $property) {
            if (!filterProperties($property)) {
                unset($element->{$property->getName()});
            } else {
                $getterName = 'get' . ucfirst($property->getName());
                if (method_exists($element, $getterName)) {
                    $element->{$property->getName()} = removeUnwantedProperties($element->$getterName());
                } else {
                    die('throw');
                }
            }
        }
    }

    return $element;
}

function filterProperties($property)
{
    $attributes = $property->getAttributes();
    foreach ($attributes as $attribute) {
        if ($attribute->getName() === NoOutput::class) {
            return false;
        }
    }
    return true;
}

class Test1
{
    public $x; // protected だとエラーになる

    #[NoOutput]
    public $y;

    public function __construct()
    {
        $this->x = "X";
        $this->y = "Y";
    }

    public function getX()
    {
        return $this->x;
    }

    public function getY()
    {
        return $this->y;
    }
}

$t1 = new Test1();
$object = removeUnwantedProperties($t1);
print_r($object);

Output for git.master, git.master_jit, rfc.property-hooks: Test1 Object ( [x] => X )

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2022-12-01 RFC: Property hooks - included in PHP 8.4
2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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