“将PHP/MySQL与谷歌地图一起使用”教程无法加载标记_Php_Mysql_Xml_Google Maps_Google Maps Api 3

“将PHP/MySQL与谷歌地图一起使用”教程无法加载标记

php mysql xml google-maps google-maps-api-3

“将PHP/MySQL与谷歌地图一起使用”教程无法加载标记,php,mysql,xml,google-maps,google-maps-api-3,Php,Mysql,Xml,Google Maps,Google Maps Api 3,我几乎遵循了本教程中给出的每一行内容- phpsqlajax_dbinfo.php的代码是： <? $host = "localhost"; $username="root"; $password=""; $database="Resfeber_Labs"; ?> phpsqlajax_genxml3.php的代码是： <?php require("phpsqlajax_dbinfo.php"); // Start XML file, create parent node

我几乎遵循了本教程中给出的每一行内容-

phpsqlajax_dbinfo.php的代码是：

<?
$host = "localhost";
$username="root";
$password="";
$database="Resfeber_Labs";
?>

phpsqlajax_genxml3.php的代码是：

<?php

require("phpsqlajax_dbinfo.php");

// Start XML file, create parent node

$dom = new DOMDocument("1.0");
$node = $dom->createElement("markers");
$parnode = $dom->appendChild($node);

// Opens a connection to a MySQL server

$connection=mysql_connect ($host, $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');

// Iterate through the rows, adding XML nodes for each

while ($row = @mysql_fetch_assoc($result)){
  // ADD TO XML DOCUMENT NODE
  $node = $dom->createElement("marker");
  $newnode = $parnode->appendChild($node);
  $newnode->setAttribute("name",$row['name']);
  $newnode->setAttribute("address", $row['address']);
  $newnode->setAttribute("lat", $row['lat']);
  $newnode->setAttribute("lng", $row['lng']);
  $newnode->setAttribute("type", $row['type']);
}

echo $dom->saveXML();

?>

ajax_map_v3.html的代码是：

<!DOCTYPE html >
    <head>
      <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
      <meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
      <title>PHP/MySQL & Google Maps Example</title>
      <script type="text/javascript" src="http://maps.googleapis.com/maps/api/js"></script>
      <script type="text/javascript">
      //<![CDATA[

  var customIcons = {
    restaurant: {
      icon: 'http://labs.google.com/ridefinder/images/mm_20_blue.png'
    },
    bar: {
      icon: 'http://labs.google.com/ridefinder/images/mm_20_red.png'
    }
  };

  function load() {
    var map = new google.maps.Map(document.getElementById("map"), {
      center: new google.maps.LatLng(47.6145, -122.3418),
      zoom: 13,
      mapTypeId: 'roadmap'
    });
    var infoWindow = new google.maps.InfoWindow;

    // Change this depending on the name of your PHP file
    downloadUrl("phpsqlajax_genxml3.php", function(data) {
      var xml = data.responseXML;
      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 google.maps.LatLng(
            parseFloat(markers[i].getAttribute("lat")),
            parseFloat(markers[i].getAttribute("lng")));
        var html = "<b>" + name + "</b> <br/>" + address;
        var icon = customIcons[type] || {};
        var marker = new google.maps.Marker({
          map: map,
          position: point,
          icon: icon.icon
        });
        bindInfoWindow(marker, map, infoWindow, html);
      }
    });
  }

  function bindInfoWindow(marker, map, infoWindow, html) {
    google.maps.event.addListener(marker, 'click', function() {
      infoWindow.setContent(html);
      infoWindow.open(map, marker);
    });
  }

  function downloadUrl(url, callback) {
    var request = window.ActiveXObject ?
        new ActiveXObject('Microsoft.XMLHTTP') :
        new XMLHttpRequest;

    request.onreadystatechange = function() {
      if (request.readyState == 4) {
        request.onreadystatechange = doNothing;
        callback(request, request.status);
      }
    };

    request.open('GET', url, false);
    request.send(null);
  }

  function doNothing() {}

  //]]>

</script>

</head>

<body onload="load()">
  <div id="map" style="width: 500px; height: 300px"></div>
</body>

</html>

我已经看过很多关于同一个的帖子，但仍然无法将标记加载到显示的地图上。 XML返回得很好，如下所示：

<markers>
    <marker name="Pan Africa Market" address="1521 1st Ave, Seattle, WA" lat="47.608940" lng="-122.340141" type="restaurant"/>
    <marker name="Buddha Thai & Bar" address="2222 2nd Ave, Seattle, WA" lat="47.613590" lng="-122.344391" type="bar"/>
    <marker name="The Melting Pot" address="14 Mercer St, Seattle, WA" lat="47.624561" lng="-122.356445" type="restaurant"/>
    <marker name="Ipanema Grill" address="1225 1st Ave, Seattle, WA" lat="47.606365" lng="-122.337654" type="restaurant"/>
    <marker name="Sake House" address="2230 1st Ave, Seattle, WA" lat="47.612823" lng="-122.345673" type="bar"/>
    <marker name="Crab Pot" address="1301 Alaskan Way, Seattle, WA" lat="47.605961" lng="-122.340363" type="restaurant"/>
    <marker name="Mama's Mexican Kitchen" address="2234 2nd Ave, Seattle, WA" lat="47.613976" lng="-122.345467" type="bar"/>
    <marker name="Wingdome" address="1416 E Olive Way, Seattle, WA" lat="47.617214" lng="-122.326584" type="bar"/>
    <marker name="Piroshky Piroshky" address="1908 Pike pl, Seattle, WA" lat="47.610126" lng="-122.342834" type="restaurant"/>
</markers>

任何关于装载标记的帮助都将不胜感激。谢谢。

这个解决方案非常简单，与我在多个问题中收集的流行观点相反，谷歌地图api是正确的。文件必须托管在web服务器上，而不是文件系统上。另外，request.open语句不应设置为false，而应保留为true。

让我们假设教程是正确的，并且有效。我确信，我们应该如何根据给定的信息给出答案，例如。返回的错误会很有趣，发布的代码是教程的100%副本。在控制台日志中的chrome上，错误是：XMLHttpRequest无法加载file:///opt/lampp/htdocs/Resfeber_Labs/maps/phpsqlajax_genxml3.xml. 仅HTTP支持跨源请求。ajax\u map\u v3.html:71下载URL ajax\u map\u v3.html:71加载ajax\u map\u v3.html:29加载ajax\u map\u v3.html:82未捕获的网络错误：未能在“XMLHttpRequest”上执行“发送”：加载失败file:///opt/lampp/htdocs/Resfeber_Labs/maps/phpsqlajax_genxml3.xml'. ajax\u map\u v3.html:71下载URL ajax\u map\u v3.html:71加载ajax\u map\u v3.html:29加载ajax\u map\u v3.html:82在Web服务器上运行ajax\u map\u v3.html，而不是在filesystem@Dr.Molle在Web服务器上运行它，错误是它现在可以工作了！我已将request.open语句设置为false，必须将其设置为true，并且文件必须在web服务器上运行。