Question

是否有以下等价物：

header("Content-type: text/xml");

我正在使用带有Wordpress的Google地图，我收到“已发送标头”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，所以只是想知道是否有其他方法来执行上面的代码。

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('&laquo;', 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)
{
$xmlStr=str_replace('<','&lt;',$htmlStr);
$xmlStr=str_replace('>','&gt;',$xmlStr);
$xmlStr=str_replace('"','&quot;',$xmlStr);
$xmlStr=str_replace("'",'&#39;',$xmlStr);
$xmlStr=str_replace("&",'&amp;',$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>

Answer 1

现在我明白你在做什么。您无法将输出发送到屏幕然后更改标题。如果您正在尝试创建地图标记的XML文件并将其下载以显示，则它们应位于单独的文件中。

拿这个

<?php
require("database.php");
function parseToXML($htmlStr)
{
$xmlStr=str_replace('<','&lt;',$htmlStr);
$xmlStr=str_replace('>','&gt;',$xmlStr);
$xmlStr=str_replace('"','&quot;',$xmlStr);
$xmlStr=str_replace("'",'&#39;',$xmlStr);
$xmlStr=str_replace("&",'&amp;',$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>';
?>

并将其放在phpsqlajax_genxml.php中，以便您的javascript可以下载XML文件。你试图在同一个文件中做太多事情。

Answer 2

没有。发送后您无法发送标头。尝试在wordpress中使用钩子

标题的替代（“Content-type：text / xml”）;

2 个答案: