How to .... Dom Document

namitjung · June 20th, 2005, 03:42 AM

Hi All

Hi all

I am using php 4.3.11 and try to execute following code.But gives me the error.This code works fine on php 5.0.4 but i have to use it on php 4.3.11 because my web server doesn't support php 5.0.4. Please help me out I got dom enabled on php 4.3.11.When i use phpinfo() it shows that dom xml is enabled on php

And here is the code.

<?php
$doc=new DomDocument;
$doc->save("test.xml");
?>

Gives me following error:

Warning: domdocument() expects at least 1 parameter, 0 given in c:\inetpub\wwwroot\test.php

on line 2

<?php
$doc=new DomDocument("1.0");
$doc->save("test.xml");
?>

Gives me following error

Warning: domdocument(): Start tag expected, '<' not found in c:\inetpub\wwwroot\test.php on

line 2

Please help me solve this problem

Philibuster · June 29th, 2005, 07:34 PM

Do you have a reason not to use domxml_new_doc() instead? The following works on PHP 4.3.0:

$doc = domxml_new_doc("1.0");
$root = $doc->create_element("HTML");
$root = $doc->append_child($root);
$head = $doc->create_element("HEAD");
$head = $root->append_child($head);
$title = $doc->create_element("TITLE");
$title = $head->append_child($title);
$text = $doc->create_text_node("This is the title");
$text = $title->append_child($text);
echo "<PRE>";
echo htmlentities($doc->dump_mem(true));
echo "</PRE>";

It produces:

<?xml version="1.0"?>
<HTML>
  <HEAD>
    <TITLE>This is the title</TITLE>
  </HEAD>
</HTML>

Philibuster

namitjung · June 30th, 2005, 11:28 PM

Thanks for your reply. It worked fine.But it produced out put to browser only. I need to save that content in an xml file.

Likewise if we edited existing xml file using xml dom it should edit that file and save it.

How can i do this

Thank You

Philibuster · July 2nd, 2005, 05:53 PM

To save to a file, simply use the string buffer produced by $doc->dump_mem(true) in the example to your file using fopen/fwrite/fclose.

Here is an example with this change:

$doc = domxml_new_doc("1.0");
$root = $doc->create_element("HTML");
$root = $doc->append_child($root);
$head = $doc->create_element("HEAD");
$head = $root->append_child($head);
$title = $doc->create_element("TITLE");
$title = $head->append_child($title);
$text = $doc->create_text_node("This is the title");
$text = $title->append_child($text);
$xml_data = $doc->dump_mem(true);

$filename = 'test.xml'; //change this to the filepath/name you like

// Let's make sure the file exists and is writable first.
if (is_writable($filename)) {

    if (!$handle = fopen($filename, 'wb')) {
         echo "Cannot open file ($filename)";
         exit;
    }

    // Write $xml_data to our opened file.
    if (fwrite($handle, $xml_data) === FALSE) {
        echo "Cannot write to file ($filename)";
        exit;
    }

    echo "Success, wrote ($somecontent) to file ($filename)";

    fclose($handle);

} else {
    echo "The file $filename is not writable";

A more complete solution to your problem would involve more extensive PHP code. Several complete implementations can be found on other PHP sites (for example, take a look at www.phpclasses.org).

Philibuster

namitjung · July 7th, 2005, 12:17 AM

Thankx for your reply.

Here we can save the file.But what if we have to edit the file. I mean an xml file looks like this
<proudctdetails>
<product>
  <name>Ball</name>
  <price>$4.5</price>
</product>
<product>
  <name>Doll</name>
  <price>$44.5</price>
</product>
</productdetails>

Now i want to add a product let's say Teddy bear in this xml file.How can i do this?

Thank You