Instanceof and namespaces

Question

I am facing an unexpected behaviour trying to use the following:

$object instanceof $class

1/ PHP \'instanceof\' keyword and namespaces wor

Answer 1

You can test for instances using namespaces, but use the fully qualified class name.

For your test I would do this:

$class = "\\Tools\\Tests\\Entity\\testObject";
$object = new $class;
var_dump($object instanceof $class); //bool(true)

---

You can also test this way using single quotes and not worry about escaping your backslashes and save yourself a few keystrokes.

$class = '\Tools\Tests\Entity\testObject';
$object = new $class;
var_dump($object instanceof $class); //bool(true)

Answer 2

I use simpler variant

var_dump($object instanceof \Tools\Tests\Entity\testClass);

Answer 3

You should use ReflectionClass to avoid any execution or behaviours you have in\on this model. Read more aboit ReflectionClass to get more info about class\model we checking. http://php.net/manual/en/class.reflectionclass.php

foreach ($this->modelNamespaces as $namespace) {
    $reflectionClass = new \ReflectionClass($namespace);

    if ($reflectionClass->implementsInterface('common\models\FieldsInCollectionInterface')) {
        // class is implemented by FieldsInCollectionInterface
    }
}