PHP method that returns interface instance into array

Question

I have a small question that I can't find the answer to on the internet and I'm not really sure how php and the interface work.

So the problem is I have an if(!variable instanceof class). But here, the class being checked is an interface and should be in an array, you can see in the following code

abstract class Action
{

    final public function call(Bone $bone)
    {
        $sites = $this->getSites($bone);
        foreach ($sites as $site) {
            if (!$site instanceof Site) {
                throw new \Exception("Invalid entry");
            }
        }

    }

}

class BonesSites
{
    public function getSites(string $site): array
    {
        if ($site === 'Egypt') {
            return [
                [
                    'siteId' => 1,
                    'name' => 'Cairo',
                    'bone' => 'T-Rex bones',
                ],
                [
                    'siteId' => 2,
                    'name' => 'Giza',
                    'bone' => 'Raptors bones',
                ],
                [
                    'siteId' => 3,
                    'name' => 'Alexandria',
                    'bone' => 'Bronchiosaurus bones',
                ],
            ];
        }

        return ['error' => 'Site not found!'];
    }
}


interfaceBone
{
    public function getName(): string;

}

interface site
{
}

Is there any way to return an interface in an array?

Answer 1

You need to create an extra class called Site and return an array of objects.

class Site
{
    private int $siteId;
    private string $name;
    private string $bone;

    /**
     * @param int    $siteId
     * @param string $name
     * @param string $bone
     */
    public function __construct(int $siteId, string $name, string $bone)
    {
        $this->siteId = $siteId;
        $this->name = $name;
        $this->bone = $bone;
    }

    /**
     * @return int
     */
    public function getSiteId(): int
    {
        return $this->siteId;
    }

    /**
     * @param int $siteId
     */
    public function setSiteId(int $siteId): void
    {
        $this->siteId = $siteId;
    }

    /**
     * @return string
     */
    public function getName(): string
    {
        return $this->name;
    }

    /**
     * @param string $name
     */
    public function setName(string $name): void
    {
        $this->name = $name;
    }

    /**
     * @return string
     */
    public function getBone(): string
    {
        return $this->bone;
    }

    /**
     * @param string $bone
     */
    public function setBone(string $bone): void
    {
        $this->bone = $bone;
    }

}

Then return the site array:

        return
            [
                (new Site(1, '开罗', 'T-Rex骨骼')),
                (new Site(2, '吉萨', '迅猛龙骨骼')),
                (new Site(3, '亚历山大', '腕龙骨骼'))
            ];