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run code in 300+ PHP versions simultaneously

@ 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 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: 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.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33: Warning: array_sum() expects exactly 1 parameter, 2 given in /in/7tVQB on line 44
Output for 5.6.8 - 5.6.28: Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/7tVQB on line 8
Process exited with code 255.
Output for 5.5.24 - 5.5.35: Parse error: syntax error, unexpected '.', expecting '&' or variable (T_VARIABLE) in /in/7tVQB on line 8
Process exited with code 255.

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