Online PHP editor | refs for Qmm0D

<?php interface ObjectFeature { public function __construct($object); } interface ObjectHasFeatures { public function addFeature($feature); public function getFeature($class); public function hasFeature($class); } trait HasFeatures { private $_hasfeatures_features = []; public function addFeature($class) { $this->_hasfeatures_features[$class] = new $class($this); } public function getFeature($class) { return $this->_hasfeatures_features[$class]; } public function hasFeature($class) { return isset($this->_hasfeatures_features[$class]); } } class Car implements ObjectHasFeatures { use HasFeatures; private $name; public function __construct($name) { $this->name = $name; } public function getName() { return $this->name; } } class FlyingFeature implements ObjectFeature { private $car; public function __construct($object) { assert($object instanceof Car); $this->car = $object; } public function fly() { echo "*{$this->car->getName()} starts flying*\n"; } } $car = new Car("Notion's Car"); $car->addFeature(FlyingFeature::class); $car->getFeature(FlyingFeature::class)->fly();