yii2-rss

Yii2 Framework extension to provide functionality for consuming RSS and Atom feeds using zend-feed library.

Installation

{
    "require": 
    {
        "yurkinx/yii2-rss": "dev-master"
    }
}

Configuration

In config file

/config/web.php

Add feed component

'components' => array(
        ...
        'feed' => array(
                'class' => 'yii\feed\FeedDriver',
                ),
            )

Simple usage

Read Rss feed:

$feed=Yii::$app->feed->reader()->import('http://exapmple.com/feed.rss');

This will get RSS feed, parse it and return feed object. For more details you can read the official Zend-feed extention documentaion: http://framework.zend.com/manual/2.2/en/modules/zend.feed.reader.html

Create Rss feed:

Create action Rss in controller

public function actionRss(){

     $feed=Yii::$app->feed->writer();

    $feed->setTitle(Yii::$app->params['title']);
        $feed->setLink('http://example.com');
        $feed->setFeedLink('http://example.com/rss', 'rss');
        $feed->setDescription(Yii::t('app','Recent headlines'));
        $feed->setGenerator('http://example.com/rss');
        $feed->setDateModified(time()); 
        /**
        * Add one or more entries. Note that entries must
        * be manually added once created.
        */
        $posts=Post::find()->orderBy('id DESC')->limit(20)->all();
        foreach($posts as $post){
                $entry = $feed->createEntry();
                $entry->setTitle($post->title);
                $entry->setLink(Yii::$app->urlManager->createAbsoluteUrl('/post/view',['id'=>$post->id]));
                $entry->setDateModified(intval($post->created));
                $entry->setDateCreated(intval($post->created));
                $entry->setContent(
                   $post->content
                );
                $entry->setEnclosure(
                    [
                     'uri'=>$post->image,
                     'type'=>'image/jpeg',
                     'length'=>filesize(Yii::getAlias('@webroot').$post->image)
                     ]
                );
                $feed->addEntry($entry);
        }
        /**
        * Render the resulting feed to Atom 1.0 and assign to $out.
        * You can substitute "atom" with "rss" to generate an RSS 2.0 feed.
        */
        $out = $feed->export('rss');
        header('Content-type: text/xml');
        echo $out;
        die();
    }

Then it's better to cache it with cache component:

public function behaviors() {
        return [
            ....
            'cache'=> [
                'only'=>['rss'],
                'class'=>PageCache::className(),
                'duration'=>0,
                'dependency'=>[
                           'class' => 'yii\caching\DbDependency',
                           'sql' => 'SELECT max(time_updated) as max FROM tbl_post',

                          ],
            ]
        ];
    }

Take a look at Zend-feed writer official documentaion for more advanced usage of Zend-feed http://framework.zend.com/manual/2.2/en/modules/zend.feed.writer.html