RSS Parser Class

[code]
<?PHP
// RSS_Class.php ////

class MarRSS {
	// -------------------------------------------------------------------
	// Public properties
	// -------------------------------------------------------------------
	var $default_cp = 'UTF-8';
	var $CDATA = 'nochange';
	var $cp = '';
	var $items_limit = 0;
	var $stripHTML = False;
	var $date_format = '0';
	

	// -------------------------------------------------------------------
	// Private variables
	// -------------------------------------------------------------------
	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');

	// -------------------------------------------------------------------
	// Parse RSS file and returns associative array.
	// -------------------------------------------------------------------
	function Get ($rss_url) {
		// If CACHE ENABLED
		if ($this->cache_dir != '') {
			$cache_file = $this->cache_dir . '/rsscache_' . md5($rss_url);
			$timedif = @(time() - filemtime($cache_file));
			if ($timedif < $this->cache_time) {
				// cached file is fresh enough, return cached array
				$result = unserialize(join('', file($cache_file)));
				// set 'cached' to 1 only if cached file is correct
				if ($result) $result['cached'] = 1;
			} else {
				// cached file is too old, create new
				$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;
			}
		}
		// If CACHE DISABLED >> load and parse the file directly
		else {
			$result = $this->Parse($rss_url);
			if ($result) $result['cached'] = 0;
		}
		// return result
		return $result;
	}
	
	// -------------------------------------------------------------------
	// Modification of preg_match(); return trimed field with index 1
	// from 'classic' preg_match() array output
	// -------------------------------------------------------------------
	function my_preg_match ($pattern, $subject) {
		// start regullar expression
		preg_match($pattern, $subject, $out);

		// if there is some result... process it and return it
		if(isset($out[1])) {
			// Process CDATA (if present)
			if ($this->CDATA == 'content') { // Get CDATA content (without CDATA tag)
				$out[1] = strtr($out[1], array('<![CDATA['=>'', ']]>'=>''));
			} elseif ($this->CDATA == 'strip') { // Strip CDATA
				$out[1] = strtr($out[1], array('<![CDATA['=>'', ']]>'=>''));
			}

			// If code page is set convert character encoding to required
			if ($this->cp != '')
				//$out[1] = $this->MyConvertEncoding($this->rsscp, $this->cp, $out[1]);
				$out[1] = iconv($this->rsscp, $this->cp.'//TRANSLIT', $out[1]);
			// Return result
			return trim($out[1]);
		} else {
		// if there is NO result, return empty string
			return '';
		}
	}

	// -------------------------------------------------------------------
	// Replace HTML entities &something; by real characters
	// -------------------------------------------------------------------
	function unhtmlentities ($string) {
		// Get HTML entities table
		$trans_tbl = get_html_translation_table (HTML_ENTITIES, ENT_QUOTES);
		// Flip keys<==>values
		$trans_tbl = array_flip ($trans_tbl);
		// Add support for &apos; entity (missing in HTML_ENTITIES)
		$trans_tbl += array('&apos;' => "'");
		// Replace entities by values
		return strtr ($string, $trans_tbl);
	}

	// -------------------------------------------------------------------
	// Parse() is private method used by Get() to load and parse RSS file.
	// Don't use Parse() in your scripts - use Get($rss_file) instead.
	// -------------------------------------------------------------------
	function Parse ($rss_url) {
		// Open and load RSS file
		if ($f = @fopen($rss_url, 'r')) {
			$rss_content = '';
			while (!feof($f)) {
				$rss_content .= fgets($f, 4096);
			}
			fclose($f);

			// Parse document encoding
			$result['encoding'] = $this->my_preg_match("'encoding=[\'\"](.*?)[\'\"]'si", $rss_content);
			// if document codepage is specified, use it
			if ($result['encoding'] != '')
				{ $this->rsscp = $result['encoding']; } // This is used in my_preg_match()
			// otherwise use the default codepage
			else
				{ $this->rsscp = $this->default_cp; } // This is used in my_preg_match()

			// Parse CHANNEL info
			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] = $temp; // Set only if not empty
			}
			// If date_format is specified and lastBuildDate is valid
			if ($this->date_format != '' && ($timestamp = strtotime($result['lastBuildDate'])) !==-1) {
						// convert lastBuildDate to specified date format
						$result['lastBuildDate'] = date($this->date_format, $timestamp);
			}

			// Parse TEXTINPUT info
			preg_match("'<textinput(|[^>]*[^/])>(.*?)</textinput>'si", $rss_content, $out_textinfo);
				// This a little strange regexp means:
				// Look for tag <textinput> with or without any attributes, but skip truncated version <textinput /> (it's not beggining tag)
			if (isset($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; // Set only if not empty
				}
			}
			// Parse IMAGE info
			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; // Set only if not empty
				}
			}
			// Parse ITEMS
			preg_match_all("'<item(| .*?)>(.*?)</item>'si", $rss_content, $items);
			$rss_items = $items[2];
			$i = 0;
			$result['items'] = array(); // create array even if there are no items
			foreach($rss_items as $rss_item) {
				// If number of items is lower then limit: Parse one item
				if ($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] = $temp; // Set only if not empty
					}
					// Strip HTML tags and other bullshit from DESCRIPTION
					if ($this->stripHTML && $result['items'][$i]['description'])
						$result['items'][$i]['description'] = strip_tags($this->unhtmlentities(strip_tags($result['items'][$i]['description'])));
					// Strip HTML tags and other bullshit from TITLE
					if ($this->stripHTML && $result['items'][$i]['title'])
						$result['items'][$i]['title'] = strip_tags($this->unhtmlentities(strip_tags($result['items'][$i]['title'])));
					// If date_format is specified and pubDate is valid
					if ($this->date_format != '' && ($timestamp = strtotime($result['items'][$i]['pubDate'])) !==-1) {
						// convert pubDate to specified date format
						$result['items'][$i]['pubDate'] = date($this->date_format, $timestamp);
					}
					// Item counter
					$i++;
				}
			}

			$result['items_count'] = $i;
			return $result;
		}
		else // Error in opening return False
		{
			return False;
		}
	}
}

?>
[/code]
[code]
<?PHP
// nieuws.php /////

function ShowOneRSS($url) { 
    global $rss; 
    if ($rs = $rss->get($url)) { 
        echo "<big><b><a href=\"$rs[link]\">$rs[title]</a></b></big><br />\n"; 
        echo "$rs[description]<br />\n"; 

            echo "<ul>\n"; 
            foreach ($rs['items'] as $item) { 
                echo "\t<li><a href=\"$item[link]\" title=\"$item[description]\">$item[title]</a></li>\n"; 
            } 
            if ($rs['items_count'] <= 0) { echo "<li>Sorry, no items found in the RSS file </li>"; } 
            echo "</ul>\n"; 
    } 
    else { 
        echo "Sorry: It's not possible to reach RSS file $url\n<br />"; 
        // you will probably hide this message in a live version 
    } 
} 

// ===================================================

// include RSS_Class 
include "RSS_Class.php"; 

// List of RSS URLs 
$rss_left = array( 
    'http://www.php.net/news.rss', 
); 
$rss_right = array( 
    'http://msdn.microsoft.com/globalrss/en-us/global-msdn-en-us.xml',  
); 

// Create RSS_Class object 
$rss = new MarRSS; 

// Set cache dir and cache time limit (5 seconds) 
// (don't forget to chmod cahce dir to 777 to allow writing) 
$rss->cache_dir = './temp'; 
$rss->cache_time = 1200; 


// Show all rss files 
echo "<table cellpadding=\"0\" border=\"0\"><tr><td width=\"100%\" valign=\"top\"><b>PHP News:</b><br>"; 
foreach ($rss_left as $url) { 
    ShowOneRSS($url); 
} 
echo "</td></tr><tr><td width=\"100%\" valign=\"top\"><hr><b>Windows News:</b><br>"; 
foreach ($rss_right as $url) { 
    ShowOneRSS($url); 
} 
echo "</td></tr></table>"; 

?>
[/code]