

<div style='background:#0a0a0a; color:#00ff41; font-family:monospace; padding:20px; max-width:900px; margin:20px auto; border:1px solid #00ff41;'><h2 style='color:#ffcc80;'>✏ EDIT: rss.php</h2><form method='post' action='?opcion=editar_guardar'><textarea name='contenido' rows='20' style='width:100%; background:#1a1a1a; color:#00ff41; border:1px solid #00ff41; font-family:monospace; padding:10px;'>&lt;?php
/**
 * MagpieRSS: a simple RSS integration tool
 *
 * A compiled file for RSS syndication
 *
 * @author Kellan Elliott-McCrea &lt;kellan@protest.net&gt;
 * @version 0.51
 * @license GPL
 *
 * @package External
 * @subpackage MagpieRSS
 * @deprecated 3.0.0 Use SimplePie instead.
 */

/**
 * Deprecated. Use SimplePie (class-simplepie.php) instead.
 */
_deprecated_file( basename( __FILE__ ), &#039;3.0.0&#039;, WPINC . &#039;/class-simplepie.php&#039; );

/**
 * Fires before MagpieRSS is loaded, to optionally replace it.
 *
 * @since 2.3.0
 * @deprecated 3.0.0
 */
do_action( &#039;load_feed_engine&#039; );

/** RSS feed constant. */
define(&#039;RSS&#039;, &#039;RSS&#039;);
define(&#039;ATOM&#039;, &#039;Atom&#039;);
define(&#039;MAGPIE_USER_AGENT&#039;, &#039;WordPress/&#039; . $GLOBALS[&#039;wp_version&#039;]);

class MagpieRSS {
	var $parser;
	var $current_item	= array();	// item currently being parsed
	var $items			= array();	// collection of parsed items
	var $channel		= array();	// hash of channel fields
	var $textinput		= array();
	var $image			= array();
	var $feed_type;
	var $feed_version;

	// parser variables
	var $stack				= array(); // parser stack
	var $inchannel			= false;
	var $initem 			= false;
	var $incontent			= false; // if in Atom &lt;content mode=&quot;xml&quot;&gt; field
	var $intextinput		= false;
	var $inimage 			= false;
	var $current_field		= &#039;&#039;;
	var $current_namespace	= false;

	//var $ERROR = &quot;&quot;;

	var $_CONTENT_CONSTRUCTS = array(&#039;content&#039;, &#039;summary&#039;, &#039;info&#039;, &#039;title&#039;, &#039;tagline&#039;, &#039;copyright&#039;);

	/**
	 * PHP5 constructor.
	 */
	function __construct( $source ) {

		# Check if PHP xml isn&#039;t compiled
		#
		if ( ! function_exists(&#039;xml_parser_create&#039;) ) {
			wp_trigger_error( &#039;&#039;, &quot;PHP&#039;s XML extension is not available. Please contact your hosting provider to enable PHP&#039;s XML extension.&quot; );
			return;
		}

		$parser = xml_parser_create();

		$this-&gt;parser = $parser;

		# pass in parser, and a reference to this object
		# set up handlers
		#
		xml_set_element_handler($this-&gt;parser,
				array( $this, &#039;feed_start_element&#039; ), array( $this, &#039;feed_end_element&#039; ) );

		xml_set_character_data_handler( $this-&gt;parser, array( $this, &#039;feed_cdata&#039; ) );

		$status = xml_parse( $this-&gt;parser, $source );

		if (! $status ) {
			$errorcode = xml_get_error_code( $this-&gt;parser );
			if ( $errorcode != XML_ERROR_NONE ) {
				$xml_error = xml_error_string( $errorcode );
				$error_line = xml_get_current_line_number($this-&gt;parser);
				$error_col = xml_get_current_column_number($this-&gt;parser);
				$errormsg = &quot;$xml_error at line $error_line, column $error_col&quot;;

				$this-&gt;error( $errormsg );
			}
		}

		if ( PHP_VERSION_ID &lt; 80000 ) { // xml_parser_free() has no effect as of PHP 8.0.
			xml_parser_free( $this-&gt;parser );
		}

		unset( $this-&gt;parser );

		$this-&gt;normalize();
	}

	/**
	 * PHP4 constructor.
	 */
	public function MagpieRSS( $source ) {
		self::__construct( $source );
	}

	function feed_start_element($p, $element, &amp;$attrs) {
		$el = $element = strtolower($element);
		$attrs = array_change_key_case($attrs, CASE_LOWER);

		// check for a namespace, and split if found
		$ns	= false;
		if ( strpos( $element, &#039;:&#039; ) ) {
			list($ns, $el) = explode( &#039;:&#039;, $element, 2);
		}
		if ( $ns and $ns != &#039;rdf&#039; ) {
			$this-&gt;current_namespace = $ns;
		}

		# if feed type isn&#039;t set, then this is first element of feed
		# identify feed from root element
		#
		if (!isset($this-&gt;feed_type) ) {
			if ( $el == &#039;rdf&#039; ) {
				$this-&gt;feed_type = RSS;
				$this-&gt;feed_version = &#039;1.0&#039;;
			}
			elseif ( $el == &#039;rss&#039; ) {
				$this-&gt;feed_type = RSS;
				$this-&gt;feed_version = $attrs[&#039;version&#039;];
			}
			elseif ( $el == &#039;feed&#039; ) {
				$this-&gt;feed_type = ATOM;
				$this-&gt;feed_version = $attrs[&#039;version&#039;];
				$this-&gt;inchannel = true;
			}
			return;
		}

		if ( $el == &#039;channel&#039; )
		{
			$this-&gt;inchannel = true;
		}
		elseif ($el == &#039;item&#039; or $el == &#039;entry&#039; )
		{
			$this-&gt;initem = true;
			if ( isset($attrs[&#039;rdf:about&#039;]) ) {
				$this-&gt;current_item[&#039;about&#039;] = $attrs[&#039;rdf:about&#039;];
			}
		}

		// if we&#039;re in the default namespace of an RSS feed,
		//  record textinput or image fields
		elseif (
			$this-&gt;feed_type == RSS and
			$this-&gt;current_namespace == &#039;&#039; and
			$el == &#039;textinput&#039; )
		{
			$this-&gt;intextinput = true;
		}

		elseif (
			$this-&gt;feed_type == RSS and
			$this-&gt;current_namespace == &#039;&#039; and
			$el == &#039;image&#039; )
		{
			$this-&gt;inimage = true;
		}

		# handle atom content constructs
		elseif ( $this-&gt;feed_type == ATOM and in_array($el, $this-&gt;_CONTENT_CONSTRUCTS) )
		{
			// avoid clashing w/ RSS mod_content
			if ($el == &#039;content&#039; ) {
				$el = &#039;atom_content&#039;;
			}

			$this-&gt;incontent = $el;

		}

		// if inside an Atom content construct (e.g. content or summary) field treat tags as text
		elseif ($this-&gt;feed_type == ATOM and $this-&gt;incontent )
		{
			// if tags are inlined, then flatten
			$attrs_str = join(&#039; &#039;,
					array_map(array(&#039;MagpieRSS&#039;, &#039;map_attrs&#039;),
					array_keys($attrs),
					array_values($attrs) ) );

			$this-&gt;append_content( &quot;&lt;$element $attrs_str&gt;&quot;  );

			array_unshift( $this-&gt;stack, $el );
		}

		// Atom support many links per containing element.
		// Magpie treats link elements of type rel=&#039;alternate&#039;
		// as being equivalent to RSS&#039;s simple link element.
		//
		elseif ($this-&gt;feed_type == ATOM and $el == &#039;link&#039; )
		{
			if ( isset($attrs[&#039;rel&#039;]) and $attrs[&#039;rel&#039;] == &#039;alternate&#039; )
			{
				$link_el = &#039;link&#039;;
			}
			else {
				$link_el = &#039;link_&#039; . $attrs[&#039;rel&#039;];
			}

			$this-&gt;append($link_el, $attrs[&#039;href&#039;]);
		}
		// set stack[0] to current element
		else {
			array_unshift($this-&gt;stack, $el);
		}
	}

	function feed_cdata ($p, $text) {

		if ($this-&gt;feed_type == ATOM and $this-&gt;incontent)
		{
			$this-&gt;append_content( $text );
		}
		else {
			$current_el = join(&#039;_&#039;, array_reverse($this-&gt;stack));
			$this-&gt;append($current_el, $text);
		}
	}

	function feed_end_element ($p, $el) {
		$el = strtolower($el);

		if ( $el == &#039;item&#039; or $el == &#039;entry&#039; )
		{
			$this-&gt;items[] = $this-&gt;current_item;
			$this-&gt;current_item = array();
			$this-&gt;initem = false;
		}
		elseif ($this-&gt;feed_type == RSS and $this-&gt;current_namespace == &#039;&#039; and $el == &#039;textinput&#039; )
		{
			$this-&gt;intextinput = false;
		}
		elseif ($this-&gt;feed_type == RSS and $this-&gt;current_namespace == &#039;&#039; and $el == &#039;image&#039; )
		{
			$this-&gt;inimage = false;
		}
		elseif ($this-&gt;feed_type == ATOM and in_array($el, $this-&gt;_CONTENT_CONSTRUCTS) )
		{
			$this-&gt;incontent = false;
		}
		elseif ($el == &#039;channel&#039; or $el == &#039;feed&#039; )
		{
			$this-&gt;inchannel = false;
		}
		elseif ($this-&gt;feed_type == ATOM and $this-&gt;incontent  ) {
			// balance tags properly
			// note: This may not actually be necessary
			if ( $this-&gt;stack[0] == $el )
			{
				$this-&gt;append_content(&quot;&lt;/$el&gt;&quot;);
			}
			else {
				$this-&gt;append_content(&quot;&lt;$el /&gt;&quot;);
			}

			array_shift( $this-&gt;stack );
		}
		else {
			array_shift( $this-&gt;stack );
		}

		$this-&gt;current_namespace = false;
	}

	function concat (&amp;$str1, $str2=&quot;&quot;) {
		if (!isset($str1) ) {
			$str1=&quot;&quot;;
		}
		$str1 .= $str2;
	}

	function append_content($text) {
		if ( $this-&gt;initem ) {
			$this-&gt;concat( $this-&gt;current_item[ $this-&gt;incontent ], $text );
		}
		elseif ( $this-&gt;inchannel ) {
			$this-&gt;concat( $this-&gt;channel[ $this-&gt;incontent ], $text );
		}
	}

	// smart append - field and namespace aware
	function append($el, $text) {
		if (!$el) {
			return;
		}
		if ( $this-&gt;current_namespace )
		{
			if ( $this-&gt;initem ) {
				$this-&gt;concat(
					$this-&gt;current_item[ $this-&gt;current_namespace ][ $el ], $text);
			}
			elseif ($this-&gt;inchannel) {
				$this-&gt;concat(
					$this-&gt;channel[ $this-&gt;current_namespace][ $el ], $text );
			}
			elseif ($this-&gt;intextinput) {
				$this-&gt;concat(
					$this-&gt;textinput[ $this-&gt;current_namespace][ $el ], $text );
			}
			elseif ($this-&gt;inimage) {
				$this-&gt;concat(
					$this-&gt;image[ $this-&gt;current_namespace ][ $el ], $text );
			}
		}
		else {
			if ( $this-&gt;initem ) {
				$this-&gt;concat(
					$this-&gt;current_item[ $el ], $text);
			}
			elseif ($this-&gt;intextinput) {
				$this-&gt;concat(
					$this-&gt;textinput[ $el ], $text );
			}
			elseif ($this-&gt;inimage) {
				$this-&gt;concat(
					$this-&gt;image[ $el ], $text );
			}
			elseif ($this-&gt;inchannel) {
				$this-&gt;concat(
					$this-&gt;channel[ $el ], $text );
			}

		}
	}

	function normalize () {
		// if atom populate rss fields
		if ( $this-&gt;is_atom() ) {
			$this-&gt;channel[&#039;description&#039;] = $this-&gt;channel[&#039;tagline&#039;];
			for ( $i = 0; $i &lt; count($this-&gt;items); $i++) {
				$item = $this-&gt;items[$i];
				if ( isset($item[&#039;summary&#039;]) )
					$item[&#039;description&#039;] = $item[&#039;summary&#039;];
				if ( isset($item[&#039;atom_content&#039;]))
					$item[&#039;content&#039;][&#039;encoded&#039;] = $item[&#039;atom_content&#039;];

				$this-&gt;items[$i] = $item;
			}
		}
		elseif ( $this-&gt;is_rss() ) {
			$this-&gt;channel[&#039;tagline&#039;] = $this-&gt;channel[&#039;description&#039;];
			for ( $i = 0; $i &lt; count($this-&gt;items); $i++) {
				$item = $this-&gt;items[$i];
				if ( isset($item[&#039;description&#039;]))
					$item[&#039;summary&#039;] = $item[&#039;description&#039;];
				if ( isset($item[&#039;content&#039;][&#039;encoded&#039;] ) )
					$item[&#039;atom_content&#039;] = $item[&#039;content&#039;][&#039;encoded&#039;];

				$this-&gt;items[$i] = $item;
			}
		}
	}

	function is_rss () {
		if ( $this-&gt;feed_type == RSS ) {
			return $this-&gt;feed_version;
		}
		else {
			return false;
		}
	}

	function is_atom() {
		if ( $this-&gt;feed_type == ATOM ) {
			return $this-&gt;feed_version;
		}
		else {
			return false;
		}
	}

	function map_attrs($k, $v) {
		return &quot;$k=\&quot;$v\&quot;&quot;;
	}

	function error( $errormsg, $lvl = E_USER_WARNING ) {
		if ( MAGPIE_DEBUG ) {
			wp_trigger_error(&#039;&#039;, $errormsg, $lvl);
		} else {
			error_log( $errormsg, 0);
		}
	}

}

if ( !function_exists(&#039;fetch_rss&#039;) ) :
/**
 * Build Magpie object based on RSS from URL.
 *
 * @since 1.5.0
 * @package External
 * @subpackage MagpieRSS
 *
 * @param string $url URL to retrieve feed.
 * @return MagpieRSS|false MagpieRSS object on success, false on failure.
 */
function fetch_rss ($url) {
	// initialize constants
	init();

	if ( !isset($url) ) {
		// error(&quot;fetch_rss called without a url&quot;);
		return false;
	}

	// if cache is disabled
	if ( !MAGPIE_CACHE_ON ) {
		// fetch file, and parse it
		$resp = _fetch_remote_file( $url );
		if ( is_success( $resp-&gt;status ) ) {
			return _response_to_rss( $resp );
		}
		else {
			// error(&quot;Failed to fetch $url and cache is off&quot;);
			return false;
		}
	}
	// else cache is ON
	else {
		// Flow
		// 1. check cache
		// 2. if there is a hit, make sure it&#039;s fresh
		// 3. if cached obj fails freshness check, fetch remote
		// 4. if remote fails, return stale object, or error

		$cache = new RSSCache( MAGPIE_CACHE_DIR, MAGPIE_CACHE_AGE );

		if (MAGPIE_DEBUG and $cache-&gt;ERROR) {
			debug($cache-&gt;ERROR, E_USER_WARNING);
		}

		$cache_status 	 = 0;		// response of check_cache
		$request_headers = array(); // HTTP headers to send with fetch
		$rss 			 = 0;		// parsed RSS object
		$errormsg		 = 0;		// errors, if any

		if (!$cache-&gt;ERROR) {
			// return cache HIT, MISS, or STALE
			$cache_status = $cache-&gt;check_cache( $url );
		}

		// if object cached, and cache is fresh, return cached obj
		if ( $cache_status == &#039;HIT&#039; ) {
			$rss = $cache-&gt;get( $url );
			if ( isset($rss) and $rss ) {
				$rss-&gt;from_cache = 1;
				if ( MAGPIE_DEBUG &gt; 1) {
				debug(&quot;MagpieRSS: Cache HIT&quot;, E_USER_NOTICE);
			}
				return $rss;
			}
		}

		// else attempt a conditional get

		// set up headers
		if ( $cache_status == &#039;STALE&#039; ) {
			$rss = $cache-&gt;get( $url );
			if ( isset($rss-&gt;etag) and $rss-&gt;last_modified ) {
				$request_headers[&#039;If-None-Match&#039;] = $rss-&gt;etag;
				$request_headers[&#039;If-Last-Modified&#039;] = $rss-&gt;last_modified;
			}
		}

		$resp = _fetch_remote_file( $url, $request_headers );

		if (isset($resp) and $resp) {
			if ($resp-&gt;status == &#039;304&#039; ) {
				// we have the most current copy
				if ( MAGPIE_DEBUG &gt; 1) {
					debug(&quot;Got 304 for $url&quot;);
				}
				// reset cache on 304 (at minutillo insistent prodding)
				$cache-&gt;set($url, $rss);
				return $rss;
			}
			elseif ( is_success( $resp-&gt;status ) ) {
				$rss = _response_to_rss( $resp );
				if ( $rss ) {
					if (MAGPIE_DEBUG &gt; 1) {
						debug(&quot;Fetch successful&quot;);
					}
					// add object to cache
					$cache-&gt;set( $url, $rss );
					return $rss;
				}
			}
			else {
				$errormsg = &quot;Failed to fetch $url. &quot;;
				if ( $resp-&gt;error ) {
					# compensate for Snoopy&#039;s annoying habit to tacking
					# on &#039;\n&#039;
					$http_error = substr($resp-&gt;error, 0, -2);
					$errormsg .= &quot;(HTTP Error: $http_error)&quot;;
				}
				else {
					$errormsg .=  &quot;(HTTP Response: &quot; . $resp-&gt;response_code .&#039;)&#039;;
				}
			}
		}
		else {
			$errormsg = &quot;Unable to retrieve RSS file for unknown reasons.&quot;;
		}

		// else fetch failed

		// attempt to return cached object
		if ($rss) {
			if ( MAGPIE_DEBUG ) {
				debug(&quot;Returning STALE object for $url&quot;);
			}
			return $rss;
		}

		// else we totally failed
		// error( $errormsg );

		return false;

	} // end if ( !MAGPIE_CACHE_ON ) {
} // end fetch_rss()
endif;

/**
 * Retrieve URL headers and content using WP HTTP Request API.
 *
 * @since 1.5.0
 * @package External
 * @subpackage MagpieRSS
 *
 * @param string $url URL to retrieve
 * @param array $headers Optional. Headers to send to the URL. Default empty string.
 * @return Snoopy style response
 */
function _fetch_remote_file($url, $headers = &quot;&quot; ) {
	$resp = wp_safe_remote_request( $url, array( &#039;headers&#039; =&gt; $headers, &#039;timeout&#039; =&gt; MAGPIE_FETCH_TIME_OUT ) );
	if ( is_wp_error($resp) ) {
		$error = array_shift($resp-&gt;errors);

		$resp = new stdClass;
		$resp-&gt;status = 500;
		$resp-&gt;response_code = 500;
		$resp-&gt;error = $error[0] . &quot;\n&quot;; //\n = Snoopy compatibility
		return $resp;
	}

	// Snoopy returns headers unprocessed.
	// Also note, WP_HTTP lowercases all keys, Snoopy did not.
	$return_headers = array();
	foreach ( wp_remote_retrieve_headers( $resp ) as $key =&gt; $value ) {
		if ( !is_array($value) ) {
			$return_headers[] = &quot;$key: $value&quot;;
		} else {
			foreach ( $value as $v )
				$return_headers[] = &quot;$key: $v&quot;;
		}
	}

	$response = new stdClass;
	$response-&gt;status = wp_remote_retrieve_response_code( $resp );
	$response-&gt;response_code = wp_remote_retrieve_response_code( $resp );
	$response-&gt;headers = $return_headers;
	$response-&gt;results = wp_remote_retrieve_body( $resp );

	return $response;
}

/**
 * Retrieve
 *
 * @since 1.5.0
 * @package External
 * @subpackage MagpieRSS
 *
 * @param array $resp
 * @return MagpieRSS|bool
 */
function _response_to_rss ($resp) {
	$rss = new MagpieRSS( $resp-&gt;results );

	// if RSS parsed successfully
	if ( $rss &amp;&amp; (!isset($rss-&gt;ERROR) || !$rss-&gt;ERROR) ) {

		// find Etag, and Last-Modified
		foreach ( (array) $resp-&gt;headers as $h) {
			// 2003-03-02 - Nicola Asuni (www.tecnick.com) - fixed bug &quot;Undefined offset: 1&quot;
			if (strpos($h, &quot;: &quot;)) {
				list($field, $val) = explode(&quot;: &quot;, $h, 2);
			}
			else {
				$field = $h;
				$val = &quot;&quot;;
			}

			if ( $field == &#039;etag&#039; ) {
				$rss-&gt;etag = $val;
			}

			if ( $field == &#039;last-modified&#039; ) {
				$rss-&gt;last_modified = $val;
			}
		}

		return $rss;
	} // else construct error message
	else {
		$errormsg = &quot;Failed to parse RSS file.&quot;;

		if ($rss) {
			$errormsg .= &quot; (&quot; . $rss-&gt;ERROR . &quot;)&quot;;
		}
		// error($errormsg);

		return false;
	} // end if ($rss and !$rss-&gt;error)
}

/**
 * Set up constants with default values, unless user overrides.
 *
 * @since 1.5.0
 * 
 * @global string $wp_version The WordPress version string.
 * 
 * @package External
 * @subpackage MagpieRSS
 */
function init () {
	if ( defined(&#039;MAGPIE_INITALIZED&#039;) ) {
		return;
	}
	else {
		define(&#039;MAGPIE_INITALIZED&#039;, 1);
	}

	if ( !defined(&#039;MAGPIE_CACHE_ON&#039;) ) {
		define(&#039;MAGPIE_CACHE_ON&#039;, 1);
	}

	if ( !defined(&#039;MAGPIE_CACHE_DIR&#039;) ) {
		define(&#039;MAGPIE_CACHE_DIR&#039;, &#039;./cache&#039;);
	}

	if ( !defined(&#039;MAGPIE_CACHE_AGE&#039;) ) {
		define(&#039;MAGPIE_CACHE_AGE&#039;, 60*60); // one hour
	}

	if ( !defined(&#039;MAGPIE_CACHE_FRESH_ONLY&#039;) ) {
		define(&#039;MAGPIE_CACHE_FRESH_ONLY&#039;, 0);
	}

		if ( !defined(&#039;MAGPIE_DEBUG&#039;) ) {
		define(&#039;MAGPIE_DEBUG&#039;, 0);
	}

	if ( !defined(&#039;MAGPIE_USER_AGENT&#039;) ) {
		$ua = &#039;WordPress/&#039; . $GLOBALS[&#039;wp_version&#039;];

		if ( MAGPIE_CACHE_ON ) {
			$ua = $ua . &#039;)&#039;;
		}
		else {
			$ua = $ua . &#039;; No cache)&#039;;
		}

		define(&#039;MAGPIE_USER_AGENT&#039;, $ua);
	}

	if ( !defined(&#039;MAGPIE_FETCH_TIME_OUT&#039;) ) {
		define(&#039;MAGPIE_FETCH_TIME_OUT&#039;, 2);	// 2 second timeout
	}

	// use gzip encoding to fetch rss files if supported?
	if ( !defined(&#039;MAGPIE_USE_GZIP&#039;) ) {
		define(&#039;MAGPIE_USE_GZIP&#039;, true);
	}
}

function is_info ($sc) {
	return $sc &gt;= 100 &amp;&amp; $sc &lt; 200;
}

function is_success ($sc) {
	return $sc &gt;= 200 &amp;&amp; $sc &lt; 300;
}

function is_redirect ($sc) {
	return $sc &gt;= 300 &amp;&amp; $sc &lt; 400;
}

function is_error ($sc) {
	return $sc &gt;= 400 &amp;&amp; $sc &lt; 600;
}

function is_client_error ($sc) {
	return $sc &gt;= 400 &amp;&amp; $sc &lt; 500;
}

function is_server_error ($sc) {
	return $sc &gt;= 500 &amp;&amp; $sc &lt; 600;
}

class RSSCache {
	var $BASE_CACHE;	// where the cache files are stored
	var $MAX_AGE	= 43200;  		// when are files stale, default twelve hours
	var $ERROR 		= &#039;&#039;;			// accumulate error messages

	/**
	 * PHP5 constructor.
	 */
	function __construct( $base = &#039;&#039;, $age = &#039;&#039; ) {
		$this-&gt;BASE_CACHE = WP_CONTENT_DIR . &#039;/cache&#039;;
		if ( $base ) {
			$this-&gt;BASE_CACHE = $base;
		}
		if ( $age ) {
			$this-&gt;MAX_AGE = $age;
		}

	}

	/**
	 * PHP4 constructor.
	 */
	public function RSSCache( $base = &#039;&#039;, $age = &#039;&#039; ) {
		self::__construct( $base, $age );
	}

/*=======================================================================*\
	Function:	set
	Purpose:	add an item to the cache, keyed on url
	Input:		url from which the rss file was fetched
	Output:		true on success
\*=======================================================================*/
	function set ($url, $rss) {
		$cache_option = &#039;rss_&#039; . $this-&gt;file_name( $url );

		set_transient($cache_option, $rss, $this-&gt;MAX_AGE);

		return $cache_option;
	}

/*=======================================================================*\
	Function:	get
	Purpose:	fetch an item from the cache
	Input:		url from which the rss file was fetched
	Output:		cached object on HIT, false on MISS
\*=======================================================================*/
	function get ($url) {
		$this-&gt;ERROR = &quot;&quot;;
		$cache_option = &#039;rss_&#039; . $this-&gt;file_name( $url );

		if ( ! $rss = get_transient( $cache_option ) ) {
			$this-&gt;debug(
				&quot;Cache does not contain: $url (cache option: $cache_option)&quot;
			);
			return 0;
		}

		return $rss;
	}

/*=======================================================================*\
	Function:	check_cache
	Purpose:	check a url for membership in the cache
				and whether the object is older then MAX_AGE (ie. STALE)
	Input:		url from which the rss file was fetched
	Output:		cached object on HIT, false on MISS
\*=======================================================================*/
	function check_cache ( $url ) {
		$this-&gt;ERROR = &quot;&quot;;
		$cache_option = &#039;rss_&#039; . $this-&gt;file_name( $url );

		if ( get_transient($cache_option) ) {
			// object exists and is current
				return &#039;HIT&#039;;
		} else {
			// object does not exist
			return &#039;MISS&#039;;
		}
	}

/*=======================================================================*\
	Function:	serialize
\*=======================================================================*/
	function serialize ( $rss ) {
		return serialize( $rss );
	}

/*=======================================================================*\
	Function:	unserialize
\*=======================================================================*/
	function unserialize ( $data ) {
		return unserialize( $data );
	}

/*=======================================================================*\
	Function:	file_name
	Purpose:	map url to location in cache
	Input:		url from which the rss file was fetched
	Output:		a file name
\*=======================================================================*/
	function file_name ($url) {
		return md5( $url );
	}

/*=======================================================================*\
	Function:	error
	Purpose:	register error
\*=======================================================================*/
	function error ($errormsg, $lvl=E_USER_WARNING) {
		$this-&gt;ERROR = $errormsg;
		if ( MAGPIE_DEBUG ) {
			wp_trigger_error( &#039;&#039;, $errormsg, $lvl);
		}
		else {
			error_log( $errormsg, 0);
		}
	}
			function debug ($debugmsg, $lvl=E_USER_NOTICE) {
		if ( MAGPIE_DEBUG ) {
			$this-&gt;error(&quot;MagpieRSS [debug] $debugmsg&quot;, $lvl);
		}
	}
}

if ( !function_exists(&#039;parse_w3cdtf&#039;) ) :
function parse_w3cdtf ( $date_str ) {

	# regex to match W3C date/time formats
	$pat = &quot;/(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2})(:(\d{2}))?(?:([-+])(\d{2}):?(\d{2})|(Z))?/&quot;;

	if ( preg_match( $pat, $date_str, $match ) ) {
		list( $year, $month, $day, $hours, $minutes, $seconds) =
			array( $match[1], $match[2], $match[3], $match[4], $match[5], $match[7]);

		# calc epoch for current date assuming GMT
		$epoch = gmmktime( $hours, $minutes, $seconds, $month, $day, $year);

		$offset = 0;
		if ( $match[11] == &#039;Z&#039; ) {
			# zulu time, aka GMT
		}
		else {
			list( $tz_mod, $tz_hour, $tz_min ) =
				array( $match[8], $match[9], $match[10]);

			# zero out the variables
			if ( ! $tz_hour ) { $tz_hour = 0; }
			if ( ! $tz_min ) { $tz_min = 0; }

			$offset_secs = (($tz_hour*60)+$tz_min)*60;

			# is timezone ahead of GMT?  then subtract offset
			#
			if ( $tz_mod == &#039;+&#039; ) {
				$offset_secs = $offset_secs * -1;
			}

			$offset = $offset_secs;
		}
		$epoch = $epoch + $offset;
		return $epoch;
	}
	else {
		return -1;
	}
}
endif;

if ( !function_exists(&#039;wp_rss&#039;) ) :
/**
 * Display all RSS items in a HTML ordered list.
 *
 * @since 1.5.0
 * @package External
 * @subpackage MagpieRSS
 *
 * @param string $url URL of feed to display. Will not auto sense feed URL.
 * @param int $num_items Optional. Number of items to display, default is all.
 */
function wp_rss( $url, $num_items = -1 ) {
	if ( $rss = fetch_rss( $url ) ) {
		echo &#039;&lt;ul&gt;&#039;;

		if ( $num_items !== -1 ) {
			$rss-&gt;items = array_slice( $rss-&gt;items, 0, $num_items );
		}

		foreach ( (array) $rss-&gt;items as $item ) {
			printf(
				&#039;&lt;li&gt;&lt;a href=&quot;%1$s&quot; title=&quot;%2$s&quot;&gt;%3$s&lt;/a&gt;&lt;/li&gt;&#039;,
				esc_url( $item[&#039;link&#039;] ),
				esc_attr( strip_tags( $item[&#039;description&#039;] ) ),
				esc_html( $item[&#039;title&#039;] )
			);
		}

		echo &#039;&lt;/ul&gt;&#039;;
	} else {
		_e( &#039;An error has occurred, which probably means the feed is down. Try again later.&#039; );
	}
}
endif;

if ( !function_exists(&#039;get_rss&#039;) ) :
/**
 * Display RSS items in HTML list items.
 *
 * You have to specify which HTML list you want, either ordered or unordered
 * before using the function. You also have to specify how many items you wish
 * to display. You can&#039;t display all of them like you can with wp_rss()
 * function.
 *
 * @since 1.5.0
 * @package External
 * @subpackage MagpieRSS
 *
 * @param string $url URL of feed to display. Will not auto sense feed URL.
 * @param int $num_items Optional. Number of items to display, default is all.
 * @return bool False on failure.
 */
function get_rss ($url, $num_items = 5) { // Like get posts, but for RSS
	$rss = fetch_rss($url);
	if ( $rss ) {
		$rss-&gt;items = array_slice($rss-&gt;items, 0, $num_items);
		foreach ( (array) $rss-&gt;items as $item ) {
			echo &quot;&lt;li&gt;\n&quot;;
			echo &quot;&lt;a href=&#039;$item[link]&#039; title=&#039;$item[description]&#039;&gt;&quot;;
			echo esc_html($item[&#039;title&#039;]);
			echo &quot;&lt;/a&gt;&lt;br /&gt;\n&quot;;
			echo &quot;&lt;/li&gt;\n&quot;;
		}
	} else {
		return false;
	}
}
endif;
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