UPGRADE FROM 3.x to 4.0

The major change in version 4.0 is the full migration to PHP 7.1. It has an impact on interface implementations.

Types are explicit

From now on, all types are explicits in method signatures. It has an impact on classes that implements :

• \FeedIo\FeedInterface
• \FeedIo\Feed\ItemInterface
• \FeedIo\Feed\NodeInterface
• \FeedIo\Feed\ElementsAwareInterface
• \FeedIo\Feed\Item\AuthorInterface
• \FeedIo\Feed\Item\MediaInterface
• \FeedIo\Feed\Node\CategoryInterface
• \FeedIo\Feed\Node\ElementInterface

For instance, FeedIo\FeedInterface::setUrl($url) becomes :

<?php

    /**
     * @param string $url
     * @return FeedInterface
     */
    public function setUrl(string $url) : FeedInterface;

As a consequence, you need to adapt any class that implements FeedIo\FeedInterface according to the new signature :

<?php

    /**
     * @param string $url
     * @return FeedInterface
     */
    public function setUrl($url)
    {
        $this->url = $url;

        return $this;
    }

becomes :

<?php

    /**
     * @param string $url
     * @return FeedInterface
     */
    public function setUrl(string $url) : FeedInterface
    {
        $this->url = $url;

        return $this;
    } 

You should refer to the new interfaces declaration to get the full list of concerned functions.