A very basic RSS reader using arc\http, arc\cache, arc\xml and arc\html

rss.php

<?php
    /**
     * This is a simple demo showing how you can use different components from ARC together
     * You can get arc at https://github.com/Ariadne-CMS/arc-arc/ or with composer:
     *
     *     composer create-project arc/arc
     */
     
    // load the composer autoloader
    require __DIR__ . '/vendor/autoload.php';

    // set shorter aliases for the html and xml writer/parser
    use \arc\html as h;
    use \arc\xml as x;

    // create a http proxy with caching based on the cache headers of each request
    $client = \arc\cache::proxy( \arc\http::client(), function($params) {
        return ( \arc\http\headers::parseCacheTime( $params['target']->responseHeaders ) );
    });

    // get a rss feed
    $feed = $client->get('http://rss.slashdot.org/Slashdot/slashdotMain');

    // parse it, try xml first, but a lot of RSS feeds aren't valid XML
    try {
        $rss = x::parse($feed);
    } catch( \Exception $e ) {
        // so in that case parse it as HTML, the ARC API is the same
        $rss = h::parse($feed);
    }
    
    // select all 'item' elements, using a CSS selector
    $items = $rss->find('item');

    // write valid HTML 
    foreach ($items as $item ) {
        echo h::article(
            h::h2( h::a( [ 'href' => $item->link->nodeValue ], $item->title->nodeValue ) ),
            h::div( [ 'class' => 'body' ], $item->description->nodeValue )
        );
    }