XML SimpleXMLElement returns nodes, DOMXPath returns error_问答_开发者

XML SimpleXMLElement returns nodes, DOMXPath returns error

开发者 https://www.devze.com 2023-03-29 03:19 出处：网络

In this web page, I have a php script to recreate divs on the page based on XML data.The script is called directly from the HTML page inside <body> </body>.

相关专题：dom php xml

In this web page, I have a php script to recreate divs on the page based on XML data. The script is called directly from the HTML page inside <body> </body>.

<body>
 <div id="page" class="demo">
 </div>

 <?php
   // script for recreating divs calls SimpleXMLElement or DOMXPath
 ?>
</body>

When I get the XML nodes with SimpleXMLElement, there are no errors, the nodes are returned. When instead I try DOMXPath, there are errors.

This returns the nodes.

$nodes = new SimpleXMLElement('communities.xml', null, true);

foreach($nodes as $node) // loop through 
{
  //restore divs from node information      
}

This doesn't return the nodes and gives errors.

$dom = new DOMDocument();
$dom->load('communities.xml');
$xpath = new DOMXPath($dom);
$nodes = $xpath->query('COMMUNITY');

foreach($nodes as $node) // loop through 
{
  //restore divs from node information      
}

To extend the script to get more information from the nodes I thought of using xpath. The additional information I want to show is: NAME: text to show for each url contained in the div (Google.com), URLC: url corresponding to the text (http://google.com). The XML file has nodes like this.

<?xml version="1.0" encoding="ISO-8859-1" ?> 
<COMMUNITIES>
  <COMMUNITY ID="c000010">
    <NAME>New000010</NAME> 
    <TOP>50</TOP> 
    <LEFT>50</LEFT> 
    <WIDTH>150</WIDTH> 
    <HEIGHT>150</HEIGHT> 
    <URLS>
      <URL ID="u000038">
        <NAME>Google.com</NAME> 
        <URLC>http://google.com</URLC> 
      </URL>
    </URLS>
  </COMMUNITY>
</COMMUNITIES>

The strange problem is that elsewhere, in ajax calls from javascript functions I get information from the XML file with xpath without any problems. Why doesn't the DOMXPath method work in that situation?

EDITS * NEW INFORMATION

Here is the php file called through ajax from the html page. This is where SimpleXMLElement works. But if I try to create a new DOMdocument() then call xpath. The new DOM document isn't created.

<?php

function get_nodes() {
// load SimpleXML
/* $nodes = new SimpleXMLElement('communities.xml', null, true); */

$dom = new DOMDocument();
$dom->load('communities.xml');

// get document element  

$xpath = new DOMXPath($dom);
$nodes = $xpath->query("//COMMUNITY");

foreach($nodes as $node) // loop through 
{

        echo "<div id = '".$node['ID']."' class= 'comdiv ui-widget-content' style = 'top: ".$node->TOP."; left: ".$node->LEFT."; width: ".$node->WIDTH."; 

height: ".$node->HEIGHT.";'> \n";            echo "   <p class = 'comhdr editableText ui-widget-header'>".$node->NAME."</p>\n";

        echo "   <a href='#' onClick=\"delete_div('".$node['ID']."');\">Delete</a>&nbsp;&nbsp;\n";
        echo "   <a href='#' onClick=\"add_url('".$node['ID']."');\">Add URL</a>&nbsp;&nbsp;\n";

        echo "</div> \n";

        echo "<script type='text/javascript'>\n";
        echo "  $('#".$node['ID']."').resizable();\n";
        echo "  $('#".$node['ID']."').draggable();\n";
        echo "  $('#".$nod开发者_开发问答e['ID']."').draggable('option', 'handle', '.comhdr');\n";
        echo "</script>\n";

}
        echo "<script type='text/javascript'>\n";
        echo "  $('.comhdr').editableText();\n";
        echo "</script>\n";

   return;
}

echo get_nodes();

?>

Community is not the root of the xml. Try $nodes = $xpath->query('//COMMUNITY');

This should select any COMMUNITY nodes in your xml document. If you only want to select them when they're children of the root element, then try:

$nodes = $xpath->query('/COMMUNITIES/COMMUNITY');

Had folder permission issues. The folder containing the XML did not have permission set for the script to write the updated XML.