Question

我正在尝试在我的网站上实施Google地图。我在这里遵循教程：https://developers.google.com/maps/articles/phpsqlajax_v3?hl=sv

但是，在循环数据库时，我无法正确输出xml。在本教程中，有三个关于如何输出xml的示例。在使用示例二和三时，我得到“第1列第2行的错误：文档末尾的额外内容”。

Som是怎么回事，为什么我收到此错误消息。由于代码来自Google我认为它是正确的，所以我最好的猜测是我在我的文件中有一些隐藏的标志。

任何帮助都非常赞赏！

<?php  

 require("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 (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"); 

// 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();
?>

修改

Here's an example of my output which might give some more insights on what's going on:

<marker name="Pan Africa Market" address="1521 1st Ave, Seattle, WA" lat="47.608940"      
lng="-122.340141" type="restaurant">
<marker name="Buddha Thai &amp; 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>
</marker>
</marker>
</marker>

所以问题似乎是标记节点没有为每个循环关闭。而是在结尾添加结束节点。

Answer 1

您已将$node分配给顶部的标记节点，并且您在while循环中覆盖它...这就是为什么它在第一次迭代后会搞乱的原因。将while循环替换为：

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

希望这有帮助。

使用php输出xml时出错

1 个答案: