是否有等效于以下内容：
header("Content-type: text/xml");
我正在使用带有 Wordpress 的 Google 地图，但出现“标题已发送”错误。我已经浏览了所有文件并删除了所有空格，但错误仍然出现，所以我想知道是否还有另一种方法可以执行上面的代码。
这是错误：
Warning: Cannot modify header information - headers already sent by (output started at /home/medicom/public_html/mapping/wp-content/themes/default/header.php:11) in /home/medicom/public_html/mapping/wp-content/themes/default/new-version1.php on line 45
这是我的页面 - http://www.mediwales.com/mapping/test/
<?php
/**
* @package WordPress
* @subpackage Default_Theme
* Template Name: Latest Version
*/
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head profile="http://gmpg.org/xfn/11">
<meta http-equiv="Content-Type" content="<?php bloginfo('html_type');?>; charset=<?php bloginfo('charset');?>" />
<title><?php wp_title('«', true, 'right');?></title>
<link rel="stylesheet" href="<?php bloginfo('stylesheet_url');?>" type="text/css" media="screen" />
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js" type="text/javascript"></script>
<script src="<?php bloginfo('template_directory'); ?>/markerclusterer.js" type="text/javascript"></script>
<link rel="pingback" href="<?php bloginfo('pingback_url'); ?>" />
<script src="http://maps.google.com/maps?file=api&v=2&key=ABQIAAAAdnbfsmnsdaFBmEZfsJEmiWC7p0LLmMBSsffI9l26I_viUYjW7vRG7TlO-sRQKR0B_YAsP2VnDdVgsr4Aegvksdw" type="text/javascript"></script>
<?php if ( is_singular() ) wp_enqueue_script( 'comment-reply' ); ?>
<?php wp_head(); ?>
</head>
<body <?php body_class(); ?> onload="load()" onunload="GUnload()">
<?php if (have_posts()) : ?>
<?php while (have_posts()) : the_post(); ?>
<div id="body">
<?php
require("database.php");
function parseToXML($htmlStr)
{
$xmlStr=str_replace('<','<',$htmlStr);
$xmlStr=str_replace('>','>',$xmlStr);
$xmlStr=str_replace('"','"',$xmlStr);
$xmlStr=str_replace("'",''',$xmlStr);
$xmlStr=str_replace("&",'&',$xmlStr);
return $xmlStr;
}
// Opens a connection to a MySQL server
$connection=mysql_connect (localhost, $username, $password);
if (!$connection) {
die('Not connected : ' . mysql_error());
}
// Set the active MySQL database
$db_selected = mysql_select_db($database, $connection);
if (!$db_selected) {
die ('Can\'t use db : ' . mysql_error());
}
// Select all the rows in the markers table
$query = "SELECT * FROM markers WHERE 1";
$result = mysql_query($query);
if (!$result) {
die('Invalid query: ' . mysql_error());
}
header("Content-type: text/xml");
// Start XML file, echo parent node
echo '<markers>';
// Iterate through the rows, printing XML nodes for each
while ($row = @mysql_fetch_assoc($result)){
// ADD TO XML DOCUMENT NODE
echo '<marker ';
echo 'name="' . parseToXML($row['name']) . '" ';
echo 'address="' . parseToXML($row['address']) . '" ';
echo 'lat="' . $row['lat'] . '" ';
echo 'lng="' . $row['lng'] . '" ';
echo 'type="' . $row['type'] . '" ';
echo '/>';
}
// End XML file
echo '</markers>';
?>
<script type="text/javascript">
//<![CDATA[
var iconBlue = new GIcon();
iconBlue.image = 'http://labs.google.com/ridefinder/images/mm_20_blue.png';
iconBlue.shadow = 'http://labs.google.com/ridefinder/images/mm_20_shadow.png';
iconBlue.iconSize = new GSize(12, 20);
iconBlue.shadowSize = new GSize(22, 20);
iconBlue.iconAnchor = new GPoint(6, 20);
iconBlue.infoWindowAnchor = new GPoint(5, 1);
var iconRed = new GIcon();
iconRed.image = 'http://labs.google.com/ridefinder/images/mm_20_red.png';
iconRed.shadow = 'http://labs.google.com/ridefinder/images/mm_20_shadow.png';
iconRed.iconSize = new GSize(12, 20);
iconRed.shadowSize = new GSize(22, 20);
iconRed.iconAnchor = new GPoint(6, 20);
iconRed.infoWindowAnchor = new GPoint(5, 1);
var customIcons = [];
customIcons["restaurant"] = iconBlue;
customIcons["bar"] = iconRed;
function load() {
if (GBrowserIsCompatible()) {
var map = new GMap2(document.getElementById("map"));
map.addControl(new GSmallMapControl());
map.addControl(new GMapTypeControl());
map.setCenter(new GLatLng(47.614495, -122.341861), 13);
GDownloadUrl("phpsqlajax_genxml.php", function(data) {
var xml = GXml.parse(data);
var markers = xml.documentElement.getElementsByTagName("marker");
for (var i = 0; i < markers.length; i++) {
var name = markers[i].getAttribute("name");
var address = markers[i].getAttribute("address");
var type = markers[i].getAttribute("type");
var point = new GLatLng(parseFloat(markers[i].getAttribute("lat")),
parseFloat(markers[i].getAttribute("lng")));
var marker = createMarker(point, name, address, type);
map.addOverlay(marker);
}
});
}
}
function createMarker(point, name, address, type) {
var marker = new GMarker(point, customIcons[type]);
var html = "<b>" + name + "</b> <br/>" + address;
GEvent.addListener(marker, 'click', function() {
marker.openInfoWindowHtml(html);
});
return marker;
}
//]]>
</script>
<div id="map" style="width: 500px; height: 300px"></div>
</div>
<?php endwhile; ?>
<?php endif; ?>
</div>
<?php wp_footer(); ?>
</body></html>