Adding a attribute to a property

try {

    if ($id = filter_input(INPUT_GET, 'id')) {
        $attributecode = filter_input(INPUT_GET, 'code');
        if (!$attributecode) {
            $attributecode = 'ATTR02'; // Character prop as example
        }

        // Get attribute from the collection
        $attributes = \tabs\apiclient\Collection::factory(
            'attribute',
            new \tabs\apiclient\AttributeBoolean
        );
        $attributes->setDiscriminator(
            'type'
        )->setDiscriminatorMap(
            array(
                'Boolean' => new \tabs\apiclient\AttributeBoolean,
                'Hybrid' => new \tabs\apiclient\AttributeHybrid,
                'String' => new \tabs\apiclient\AttributeString,
                'Number' => new \tabs\apiclient\AttributeNumber
            )
        )->fetch();

        $attribute = $attributes->filter(function($a) use($attributecode) {
            return $a->getCode() === $attributecode;
        })->first();

        if (!$attribute) {
            throw new \RuntimeException('Attribute not found');
        }

        $property = new \tabs\apiclient\Property($id);
        $property->get();

        // Get a list of attributes on the property
        $propertyAttributes = $property->getAttributes();

        // Check attribute exists by its code
        $pattr = $propertyAttributes->filter(function($pa) use($attribute) {
            return $pa->getAttribute()->getCode() === $attribute->getCode();
        })->first();

        if (!$pattr) {
            $pattr = new \tabs\apiclient\property\Attribute();
            $pattr->setAttribute($attribute);
            $propertyAttributes->addElement($pattr);
        }

        // Set the attribute comment to know users what we're doing!
        $pattr->setComments('Updated by tabs api client example code');

        if ($attribute->getType() === 'Number') {
            $pattr->setValue(0);
        } else if ($attribute->getType() === 'Boolean') {
            $pattr->setValue(true);
        } else if ($attribute->getType() === 'Hybrid') {
            $pattr->setValue(['value' => 'test', 'boolean' => true]);
        } else {
            $pattr->setValue('test');
        }

        $id = $pattr->getId();
        if ($id) {
            $pattr->update();
            echo 'Attribute updated!';
        } else {
            $pattr->create();
            echo 'Attribute created!';
        }

    }
} catch(Exception $e) {
    echo $e->getMessage();
}