README

Small library for obtaining RSS feed with caching.

composer require compolomus/RssReader

Usage

You can parse feed from multiple sources at once, and obtained posts will be sorted by timestamp (asc). Here's an example of how to use the RssReader class:

Example: Parsing RSS feeds and retrieving all posts

<?php
require __DIR__ . '/vendor/autoload.php';

use Compolomus\RssReader\RssReader;

// Prepare RSS reader
$rss = new RssReader([
    'https://3dnews.ru/breaking/rss/',
    'https://3dnews.ru/motherboard/rss/',
]);

// Get all posts
$result = $rss->getAll();
print_r($result);

After the first call of this script, you will see all messages from the RSS feed with their IDs cached. On subsequent calls, only new IDs will be processed because all cached IDs will be skipped. Each call will append IDs to the cache, ensuring that you never receive duplicates from the feed.

Advanced example: Same as above but with customizing cache settings

<?php
require __DIR__ . '/vendor/autoload.php';

use Compolomus\RssReader\Cache\FileCache;
use Compolomus\RssReader\RssReader;

// Prepare cache
$cache = new FileCache('/tmp/RssReader', 'ids.txt');

// Prepare RSS reader
$rss = new RssReader([
    'https://3dnews.ru/breaking/rss/',
    'https://3dnews.ru/motherboard/rss/',
], $cache);

// Get all posts
$result = $rss->getAll();
print_r($result);

Environment Variables

The RssReader library supports several environment variables for customization:

Environment variable RSSREADER_LIMIT allows limiting the number of recent posts. By default, there is no limit (0 or empty). The cache directory and filename can also be customized using the RSSREADER_CACHE_DIR and RSSREADER_CACHE_FILE environment variables.

Testing

To run tests for this library, execute the following command:

composer test

Quality Assurance

This project uses several tools to ensure code quality and maintainability:

• PHP_CodeSniffer: Checks the code syntax and style against the PSR-12 standard.
• PHPStan: Performs static analysis of the codebase to find potential bugs and errors.
• PHPUnit: Used for testing purposes.