bertramakers

<?php

function arrayFunction(array $numbers) {
  print 'Got array with ' . count($numbers) . ' members.<br />';
}

function variableArgumentFunction(...$numbers) {
  print 'Got array with ' . count($numbers) . ' members.<br />';
}

bertramakers

<?php

class Ratings extends GenericCollection
{
  public function __construct(Rating ...$ratings) {
    $this->values = $ratings;
  }
  
  public function getAverage() : Rating { /* ... */ }
}

bertramakers

<?php

abstract class GenericCollection implements IteratorAggregate
{
  protected $values;
  
  public function toArray() : array {
    return $this->values;
  }
  

bertramakers

<?php

// Initial Ratings collection
$ratings = new Ratings(
  new Rating(1.5),
  new Rating(3.5),
  new Rating(2.5)
);

// Convert the collection to an array.

bertramakers

<?php

class Ratings implements IteratorAggregate {
  private $ratings;
  
  public function __construct(Rating ...$ratings) {
    $this->ratings = $ratings;
  }
  
  public function getAverage() : Rating {

bertramakers

<?php

declare(strict_types=1);

class Rating {
  private $value;
  
  public function __construct(float $value) {
    if ($value < 0 || $value > 5) {
      throw new \InvalidArgumentException('A rating should always be a number between 0 and 5!');

bertramakers

<?php

class Movie {
  private $airdates;
  private $ratings;
  
  public function __construct(AirDates $airdates, Ratings $ratings) {
    $this->airdates = $airdates;
    $this->ratings = $ratings;
  }

bertramakers

<?php

$movie = new Movie();

$movie->setAirDates(
  \DateTimeImmutable::createFromFormat('Y-m-d', '2017-01-28'),
  \DateTimeImmutable::createFromFormat('Y-m-d', '2017-02-22')
);

bertramakers

<?php

class AirDates implements IteratorAggregate {
  private $dates;
  
  public function __construct(\DateTimeImmutable ...$dates) {
    $this->dates = $dates;
  }
  
  public function getIterator() {

bertramakers

<?php

declare(strict_types=1);

class Ratings implements IteratorAggregate {
  private $ratings;
  
  public function __construct(float ...$ratings) {
    $this->ratings = $ratings;
  }