122 lines
3.1 KiB
PHP
122 lines
3.1 KiB
PHP
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<?php defined('SYSPATH') OR die('No direct access allowed.');
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/**
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* Feed helper class.
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*
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* $Id: feed.php 4152 2009-04-03 23:26:23Z ixmatus $
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*
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* @package Core
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* @author Kohana Team
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* @copyright (c) 2007-2008 Kohana Team
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* @license http://kohanaphp.com/license.html
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*/
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class feed_Core {
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/**
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* Parses a remote feed into an array.
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*
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* @param string remote feed URL
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* @param integer item limit to fetch
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* @return array
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*/
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public static function parse($feed, $limit = 0)
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{
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// Check if SimpleXML is installed
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if( ! function_exists('simplexml_load_file'))
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throw new Kohana_User_Exception('Feed Error', 'SimpleXML must be installed!');
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// Make limit an integer
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$limit = (int) $limit;
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// Disable error reporting while opening the feed
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$ER = error_reporting(0);
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// Allow loading by filename or raw XML string
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$load = (is_file($feed) OR valid::url($feed)) ? 'simplexml_load_file' : 'simplexml_load_string';
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// Load the feed
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$feed = $load($feed, 'SimpleXMLElement', LIBXML_NOCDATA);
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// Restore error reporting
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error_reporting($ER);
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// Feed could not be loaded
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if ($feed === FALSE)
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return array();
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// Detect the feed type. RSS 1.0/2.0 and Atom 1.0 are supported.
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$feed = isset($feed->channel) ? $feed->xpath('//item') : $feed->entry;
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$i = 0;
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$items = array();
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foreach ($feed as $item)
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{
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if ($limit > 0 AND $i++ === $limit)
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break;
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$items[] = (array) $item;
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}
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return $items;
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}
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/**
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* Creates a feed from the given parameters.
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*
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* @param array feed information
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* @param array items to add to the feed
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* @param string define which format to use
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* @param string define which encoding to use
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* @return string
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*/
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public static function create($info, $items, $format = 'rss2', $encoding = 'UTF-8')
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{
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$info += array('title' => 'Generated Feed', 'link' => '', 'generator' => 'KohanaPHP');
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$feed = '<?xml version="1.0" encoding="'.$encoding.'"?><rss version="2.0"><channel></channel></rss>';
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$feed = simplexml_load_string($feed);
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foreach ($info as $name => $value)
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{
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if (($name === 'pubDate' OR $name === 'lastBuildDate') AND (is_int($value) OR ctype_digit($value)))
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{
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// Convert timestamps to RFC 822 formatted dates
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$value = date(DATE_RFC822, $value);
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}
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elseif (($name === 'link' OR $name === 'docs') AND strpos($value, '://') === FALSE)
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{
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// Convert URIs to URLs
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$value = url::site($value, 'http');
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}
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// Add the info to the channel
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$feed->channel->addChild($name, $value);
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}
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foreach ($items as $item)
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{
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// Add the item to the channel
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$row = $feed->channel->addChild('item');
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foreach ($item as $name => $value)
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{
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if ($name === 'pubDate' AND (is_int($value) OR ctype_digit($value)))
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{
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// Convert timestamps to RFC 822 formatted dates
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$value = date(DATE_RFC822, $value);
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}
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elseif (($name === 'link' OR $name === 'guid') AND strpos($value, '://') === FALSE)
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{
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// Convert URIs to URLs
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$value = url::site($value, 'http');
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}
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// Add the info to the row
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$row->addChild($name, $value);
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}
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}
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return $feed->asXML();
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}
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} // End feed
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