<?php
class RSS_Parser {
var $default_cp = 'UTF-8';
var $CDATA = 'nochange';
var $cp = '';
var $items_limit = 0;
var $stripHTML = False;
var $date_format = '';
var $channeltags = array ('title', 'link', 'description', 'language', 'copyright', 'managingEditor', 'webMaster', 'lastBuildDate', 'rating', 'docs');
var $itemtags = array('title', 'link', 'description', 'author', 'category', 'comments', 'enclosure', 'guid', 'pubDate', 'source');
var $imagetags = array('title', 'url', 'link', 'width', 'height');
var $textinputtags = array('title', 'description', 'name', 'link');
function Get($rss_url)
{
if ($this->cache_dir != '')
{
$cache_file = $this->cache_dir . '/rsscache_' . md5($rss_url);
$timedif = @(time() - filemtime($cache_file));
if ($timedif < $this->cache_time)
{
$result = unserialize(join('', file($cache_file)));
if ($result)
{
$result['cached'] = 1;
}
}
else
{
$result = $this->Parse($rss_url);
$serialized = serialize($result);
if ($f = @fopen($cache_file, 'w'))
{
fwrite ($f, $serialized, strlen($serialized));
fclose($f);
}
if($result)
{
$result['cached'] = 0;
}
}
}
else
{
$result = $this->Parse($rss_url);
if($result)
{
$result['cached'] = 0;
}
}
return $result;
}
function my_preg_match ($pattern, $subject)
{
preg_match($pattern, $subject, $out);
if(isset($out[1]))
{
if($this->CDATA == 'content')
{
$out[1] = strtr($out[1], array('<![CDATA['=>'', ']]>'=>''));
}
elseif($this->CDATA == 'strip')
{
$out[1] = strtr($out[1], array('<![CDATA['=>'', ']]>'=>''));
}
if($this->cp != '')
{
$out[1] = iconv($this->rsscp, $this->cp.'//TRANSLIT', $out[1]);
}
return trim($out[1]);
}
else
{
return '';
}
}
function unhtmlentities($string) {
$trans_tbl = get_html_translation_table(HTML_ENTITIES, ENT_QUOTES);
$trans_tbl = array_flip ($trans_tbl);
$trans_tbl += array(''' => "'");
return strtr($string, $trans_tbl);
}
function Parse($rss_url) {
if($f = @fopen($rss_url, 'r'))
{
$rss_content = '';
while (!feof($f))
{
$rss_content .= fgets($f, 4096);
}
fclose($f);
$result['encoding'] = $this->my_preg_match("'encoding=[\'\"](.*?)[\'\"]'si", $rss_content);
if ($result['encoding'] != '')
{
$this->rsscp = $result['encoding'];
}
else
{
$this->rsscp = $this->default_cp;
}
preg_match("'<channel.*?>(.*?)</channel>'si", $rss_content, $out_channel);
foreach($this->channeltags as $channeltag)
{
$temp = $this->my_preg_match("'<$channeltag.*?>(.*?)</$channeltag>'si", $out_channel[1]);
if($temp != '')
{
$result[$channeltag] = $temp;
}
}
if ($this->date_format != '' && ($timestamp = strtotime($result['lastBuildDate'])) !==-1)
{
$result['lastBuildDate'] = date($this->date_format, $timestamp);
}
preg_match("'<textinput(|[^>]*[^/])>(.*?)</textinput>'si", $rss_content, $out_textinfo);
if (isset($out_textinfo[2]))
{
foreach($this->textinputtags as $textinputtag)
{
$temp = $this->my_preg_match("'<$textinputtag.*?>(.*?)</$textinputtag>'si", $out_textinfo[2]);
if ($temp != '')
{
$result['textinput_'.$textinputtag] = $temp;
}
}
}
preg_match("'<image.*?>(.*?)</image>'si", $rss_content, $out_imageinfo);
if (isset($out_imageinfo[1]))
{
foreach($this->imagetags as $imagetag)
{
$temp = $this->my_preg_match("'<$imagetag.*?>(.*?)</$imagetag>'si", $out_imageinfo[1]);
if ($temp != '')
{
$result['image_'.$imagetag] = $temp;
}
}
}
preg_match_all("'<item(| .*?)>(.*?)</item>'si", $rss_content, $items);
$rss_items = $items[2];
$i = 0;
$result['items'] = array();
foreach($rss_items as $rss_item)
{
if ($i < $this->items_limit || $this->items_limit == 0)
{
foreach($this->itemtags as $itemtag)
{
$temp = $this->my_preg_match("'<$itemtag.*?>(.*?)</$itemtag>'si", $rss_item);
if ($temp != '')
{
$result['items'][$i][$itemtag] = $temp;
}
}
if($this->stripHTML && $result['items'][$i]['description'])
{
$result['items'][$i]['description'] = strip_tags($this->unhtmlentities(strip_tags($result['items'][$i]['description'])));
}
if($this->stripHTML && $result['items'][$i]['title'])
{
$result['items'][$i]['title'] = strip_tags($this->unhtmlentities(strip_tags($result['items'][$i]['title'])));
}
if($this->date_format != '' && ($timestamp = strtotime($result['items'][$i]['pubDate'])) !==-1)
{
$result['items'][$i]['pubDate'] = date($this->date_format, $timestamp);
}
$i++;
}
}
$result['items_count'] = $i;
return $result;
}
else
{
return False;
}
}
}
$rss = new RSS_Parser();
$rss->cache_dir = "./temp";
$rss->cache_time = 1200;
if ($rs = $rss->get("http://php.net/news.rss")) {
if ($rs[image_url] != '') {
print("<a href=\"$rs[image_link]\"><img src=\"$rs[image_url]\" alt=\"$rs[image_title]\" vspace=\"1\" border=\"0\" /></a><br />\n");
}
print("<big><b><a href=\"$rs[link]\">$rs[title]</a></b></big><br />\n");
print("$rs[description]<br />\n");
print("<ul>\n");
foreach($rs['items'] as $item) {
print("\t<li><a href=\"$item[link]\">".$item['title']."</a><br />".$item['description']."</li>\n");
}
print("</ul>\n");
}
else {
print("Error: It's not possible to reach RSS file...\n");
}
?>
