Iteratorパターン

Iterator.php

<?php

interface MyIterator {

    public function hasNext();

    public function next();
}

class MovieShelf {

    private $movies = array();

    public function setMovie(array $movie) {
        $this->movies[] = $movie;
    }

    public function getTitle($index) {
        return $this->movies[$index]['title'];
    }

    public function getLength() {
        return count($this->movies);
    }

    public function iterator() {
        return new MoviesIterator($this);
    }

}

class MoviesIterator implements MyIterator {

    private $movieshelf;
    private $index;

    public function __construct(MovieShelf $movie_shelf) {
        $this->movieshelf = $movie_shelf;
        $this->index = 0;
    }

    public function hasNext() {
        if ($this->movieshelf->getLength() > $this->index) {
            return true;
        } else {
            return false;
        }
    }

    public function next() {
        $title =  $this->movieshelf->getTitle($this->index);
        $this->index++;
        return $title;
    }

}

$movie_shelf = new MovieShelf;
$movie_shelf->setMovie(array('title' => 'ほげ01', 'img' => 'movie1.jpg'));
$movie_shelf->setMovie(array('title' => 'ほげ02', 'img' => 'movie2.jpg'));
$movie_shelf->setMovie(array('title' => 'ほげ03', 'img' => 'movie3.jpg'));
$movie_shelf->setMovie(array('title' => 'ほげ04', 'img' => 'movie4.jpg'));
$movie_shelf->setMovie(array('title' => 'ほげ05', 'img' => 'movie5.jpg'));

$movie_iterator = $movie_shelf->iterator();

while ($movie_iterator->hasNext()) {
    echo $movie_iterator->next();
}