I have a small problem where I couldn't find the answer on internet and I'm not quite sure how php and interfaces work.

So the problem is I have a if(!variable instanceof class). But here, the checked class is an interface and it is suppose to be in a array as 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!'];
    }
}


interface Bone
{
    public function getName(): string;

}

interface Site
{
}  

Any idea how to return an interface within an array?

CodePudding user response：

You would need to create an additional class, named 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;
    }

}

And to return the array of sites:

        return
            [
                (new Site(1, 'Cairo', 'T-Rex bones')),
                (new Site(2, 'Giza', 'Raptors bones')),
                (new Site(3, 'Alexandria', 'Bronchiosaurus bones'))
            ];