Author.php

<?php
/**
 * Zend Framework (http://framework.zend.com/)
 *
 * @link      http://github.com/zendframework/zf2 for the canonical source repository
 * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
 * @license   http://framework.zend.com/license/new-bsd New BSD License
 */

namespace Zend\Feed\Reader\Collection;

class Author extends AbstractCollection
{
    /**
     * Return a simple array of the most relevant slice of
     * the author values, i.e. all author names.
     *
     * @return array
     */
    public function getValues()
    {
        $authors = [];
        foreach ($this->getIterator() as $element) {
            $authors[] = $element['name'];
        }
        return array_unique($authors);
    }
}