Online PHP editor | rfc for Qmm0D

@ 2017-02-12T14:01:42Z

<?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();

Output for git.master, git.master_jit, rfc.property-hooks: *Notion's Car starts flying*

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2022-12-01 RFC: Property hooks - included in PHP 8.4
2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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