XML error: Mismatched tag at line 20

[iamfly2009]

网站访问出现这个错误。
下面的是rss.php，这个是什么问题？

<?php

/*
Created by Global Syndication's RSS Parser
http://www.globalsyndication.com/rss-parser
*/

set_time_limit(0);

$file = "http://news.google.com/news?sourceid=navclient&ie=UTF-8&rls=GGLG,GGLG:2005-22,GGLG:en&q=" . $q . "&output=rss";

$rss_channel = array();
$currently_writing = "";
$main = "";
$item_counter = 0;

function startElement($parser, $name, $attrs) {
   	global $rss_channel, $currently_writing, $main;
   	switch($name) {
   		case "RSS":
   		case "RDF:RDF":
   		case "ITEMS":
   			$currently_writing = "";
   			break;
   		case "CHANNEL":
   			$main = "CHANNEL";
   			break;
   		case "IMAGE":
   			$main = "IMAGE";
   			$rss_channel["IMAGE"] = array();
   			break;
   		case "ITEM":
   			$main = "ITEMS";
   			break;
   		default:
   			$currently_writing = $name;
   			break;
   	}
}

function endElement($parser, $name) {
   	global $rss_channel, $currently_writing, $item_counter;
   	$currently_writing = "";
   	if ($name == "ITEM") {
   		$item_counter++;
   	}
}

function characterData($parser, $data) {
	global $rss_channel, $currently_writing, $main, $item_counter;
	if ($currently_writing != "") {
		switch($main) {
			case "CHANNEL":
				if (isset($rss_channel[$currently_writing])) {
					$rss_channel[$currently_writing] .= $data;
				} else {
					$rss_channel[$currently_writing] = $data;
				}
				break;
			case "IMAGE":
				if (isset($rss_channel[$main][$currently_writing])) {
					$rss_channel[$main][$currently_writing] .= $data;
				} else {
					$rss_channel[$main][$currently_writing] = $data;
				}
				break;
			case "ITEMS":
				if (isset($rss_channel[$main][$item_counter][$currently_writing])) {
					$rss_channel[$main][$item_counter][$currently_writing] .= $data;
				} else {
					$rss_channel[$main][$item_counter][$currently_writing] = $data;
				}
				break;
		}
	}
}

$xml_parser = xml_parser_create();
xml_set_element_handler($xml_parser, "startElement", "endElement");
xml_set_character_data_handler($xml_parser, "characterData");
if (!($fp = fopen($file, "r"))) {
	die("could not open XML input");
}

while ($data = fread($fp, 4096)) {
	if (!xml_parse($xml_parser, $data, feof($fp))) {
		die(sprintf("XML error: %s at line %d",
					xml_error_string(xml_get_error_code($xml_parser)),
					xml_get_current_line_number($xml_parser)));
	}
}
xml_parser_free($xml_parser);

// output HTML
// print ("<div class=\"channelname\">" . $rss_channel["TITLE"] . "</div>"); 

if (isset($rss_channel["ITEMS"])) {
	if (count($rss_channel["ITEMS"]) > 0) {
		for($i = 0;$i < count($rss_channel["ITEMS"]);$i++) {
						
			 $format_desc = $rss_channel["ITEMS"][$i]["DESCRIPTION"];
			 $format_desc = preg_replace('!http://news.google.com/news/url?.*?url=!s', PATH.'/includes/redirect.php?url=', $format_desc); 		
			 $format_desc = strip_tags($format_desc, "<img>, <font>, <br>, <br />, <a>");
			 $format_desc = str_replace("<img src=", "<img align=\"left\" src=", $format_desc);
			 $format_desc = str_replace("</font></a><a href=", "</font></a><br /><a href=", $format_desc);
			 $format_desc = "<div id=\"dynamic_rss\">" .$format_desc . "</div>";
			 echo $format_desc;
	    }

	} else {
		echo "";
	}
}

?>

[孟子E章]

缺少结束标记，查看你生成的页面源代码，或者将xml字符串保存成txt文件查看

[asharpnet]

xml标签不匹配