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@ 2016-01-06T09:22:49Z

<?php

class Command
{
    private $photoIds;
    private $categoryIds;

    private function setPhotoIds(int ...$photoIds):self
    {
        $this->photoIds = $photoIds;

        return $this;
    }

    private function setCategoryIds(int ...$categoryIds):self
    {
        $this->categoryIds = $categoryIds;

        return $this;
    }

    public function __construct(array $photoIds, array $categoryIds)
    {
        $this
            ->setPhotoIds(...$photoIds)
            ->setCategoryIds(...$categoryIds);
    }

    public function getPhotoIds():array
    {
        return $this->photoIds;
    }

    public function getCategoryIds():array
    {
        return $this->categoryIds;
    }
}

class Handler
{
    public function __invoke(Command $command)
    {
        return array_sum($command->getPhotoIds(), $command->getCategoryIds());
    }
}

$handler = new Handler();
$command = new Command([1, 2], [3, 4]);

echo $handler($command);

Output for git.master, git.master_jit, rfc.property-hooks: Fatal error: Uncaught ArgumentCountError: array_sum() expects exactly 1 argument, 2 given in /in/7tVQB:44 Stack trace: #0 /in/7tVQB(44): array_sum(Array, Array) #1 /in/7tVQB(51): Handler->__invoke(Object(Command)) #2 {main} thrown in /in/7tVQB on line 44
Process exited with code 255.

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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