DOM and XML

Anon

Hello

I have a problem with the DOM. When I try functions in the manual (http://www.zend.com/manual/ref.domxml.php) they usually don´t work or the methods are slightly different. Take a look at this example.

An XML file, lakes.xml:
<?xml version="1.0" encoding="UTF-8"?>
<attributes>
<lake id="1">
<area>5935174</area>
<perimeter>27205</perimeter>
</lake>
<lake id="2">
<area>2903033</area>
<perimeter>13935</perimeter>
</lake>
<lake id="3">
<area>89784025</area>
<perimeter>73851</perimeter>
</lake>
</attributes>

A PHP file, test.php:
<?

// data file
$file = "lakes.xml";
// create a document object
$dom = xmldocfile($file);

// get XML version
echo "Version: " . $dom->version . " \n";

// get XML encoding
echo "Encoding: " . $dom->encoding . " \n";

// get whether standalone file
echo "Standalone: " . $dom->standalone . " \n";

// get XML URL
echo "URL: " . $dom->url . " \n";

// get XML character set
echo "Character set: " . $dom->charset . " \n";

// get reference to root node
$root = domxml_root($dom);

// get name of node
echo "root type: " . $root->type . " \n";
echo "root name: " . $root->tagname . " \n";

// get children of node, as array
$children = $root->children();

// get first child node
$firstChild = $children[0];

// let's see a few node properties
// get name of first child node
echo "firstChild name: " . $firstChild->tagname . " \n";

// get content of first child node
echo "firstChild content: " . $firstChild->content . " \n";

// get type of first child node
echo "firstChild type: " . $firstChild->type . " \n";

$morechildren = $firstChild->children();
$moreFirstChild = $morechildren[0];
echo "moreFirstChild name: " . $moreFirstChild->tagname . " \n";
echo "moreFirstChild content: " . $moreFirstChild->content . " \n";
echo "moreFirstChild type: " . $moreFirstChild->type . " \n";

// go back up the tree!
// get parent of child
$parentNode = $firstChild->parent();

// check it
echo "parentNode name: " . $parentNode->tagname . " \n";

?>
Note that I have use "tagname" instead of "name" and that "content" gives no result. The output I get is:
Version: 1.0
Encoding: UTF-8
Standalone: -1
URL: lakes.xml
Character set: 1
root type: 1
root name: attributes
firstChild name: lake
firstChild content:
firstChild type: 1
moreFirstChild name: area
moreFirstChild content:
moreFirstChild type: 1
parentNode name: attributes

This is my setup:
Red Hat 7.2
PHP 4.1.2
expat 1.95.2
mod_xslt 1.5
sablot 0.82
libxml 2.4.16
zlib 1.1.3

Am I the only one with this problem (different function names)? "->content" gives my nothing, what is the correct call? I know about the issues with whitespeces so lakes.xml is one long string, I only formatted it here for easier reading.

What I want to do is pretty simple. From the XML file lakes.xml, do a search for a specific lake (i.e id=2), present all it´s children in HTML. Any pointers on how to do that? I have read a few articles that explain DOM in PHP but they all use function calls that doesn´t work for me.

Anon

You are not the only one,Im also having same problem, Im using PhP on windows system ,webserver is PWS

I ran your code on my windows machine and got following erorrs

Version:
Encoding:
Standalone:
URL:
Character set:
PHP has encountered an Access Violation at 0195C13E

as u see it prints nothing plus Access Violation error

Anon

Please have a look on this XML file

<?xml version="1.0"?>
<website>
<url>http://www.devarticles.com</url>
</website>

now i parse this document
here is php code

// data file
$file = "tables.xml";
// create a document object
$dom = xmldocfile($file);

// get XML version
echo "Version: " . $dom->root() . " \n";

i Find this error

Fatal error: Call to a member function on a non-object in D:\Inetpub\wwwroot\parsexml.php3 on line 9

could anyone give me some nice and clean code which is usin xmldocfile() Function

by using xmldoc() ,Im not getting any error and working file.
Thanx

Anon

There is a slight difference between our problems. I get some result but you get nothing. Can you succesfully load an xml? In other words is it installed properly?

Anon

I haven´t seen anyone use XPATH in PHP. What if you want to do a search like "//lake[@id='2']". Is that possible with the DOM and if so how?