Locating a node's text value by tag name or attribute

[mr_burns]

Hi there,

I dont normally use DOM XML but have been given the task of
integrating it with a web site using PHP. I have to use DOM XML as
this is what is provided by the server.

Basically what I am tryin to do is get it to load an XML document
(that I can do) and find a specific node by its id attribute. The code
I am up to is:

<?php

$doc = domxml_open_fil e('xml/prices.xml');


....and for the xml document will be something like:

<?xml...
<items>
<item id="subscriptio n">
<signup>40.00 </signup>
<monthly>15.0 0</monthly>
</item>
..
..
..etc


....please dont be too blown away by my progress :-), I have no idea
how to simply from there locate an item with a specific id attribute
(ie. subscription) and then firstly get the text for <signup> and then
<monthly>. Also, some items with other id attributes many have just
<price> nodes instead of <signup> and <monthly> so I will need to
identify these nodes by their tag name.

I apologies as I know that there are tutorials available but they all
seem to get a bit heavy and not really simple methods. I have had
trouble finding a tutorial page that basically tells you how to locate
a node by attribute or name. Any help would be much appreciated,
cheers

burnsy

[CJ Llewellyn]

Re: Locating a node's text value by tag name or attribute

"mr_burns" <bissatch@yahoo .co.uk> wrote in message
news:651c6ea9.0 408221348.21db8 c64@posting.goo gle.com...[color=blue]
> Hi there,
>
> I dont normally use DOM XML but have been given the task of
> integrating it with a web site using PHP. I have to use DOM XML as
> this is what is provided by the server.
>
> Basically what I am tryin to do is get it to load an XML document
> (that I can do) and find a specific node by its id attribute. The code
> I am up to is:
>
> <?php
>
> $doc = domxml_open_fil e('xml/prices.xml');
>
>
> ...and for the xml document will be something like:
>
> <?xml...
> <items>
> <item id="subscriptio n">
> <signup>40.00 </signup>
> <monthly>15.0 0</monthly>
> </item>
> .
> .
> .etc
>
>
> ...please dont be too blown away by my progress :-), I have no idea
> how to simply from there locate an item with a specific id attribute
> (ie. subscription) and then firstly get the text for <signup> and then
> <monthly>. Also, some items with other id attributes many have just
> <price> nodes instead of <signup> and <monthly> so I will need to
> identify these nodes by their tag name.
>
> I apologies as I know that there are tutorials available but they all
> seem to get a bit heavy and not really simple methods. I have had
> trouble finding a tutorial page that basically tells you how to locate
> a node by attribute or name. Any help would be much appreciated,
> cheers[/color]

When you open a xml file you create a complex data structure consisting of
objects and arrays of objects, starting at the top level with a domDocument
object/class.

That document will have an array of childNode objects/class.

To read through the data in your document you need to read through each
child node.

foreach($doc->child_nodes( ) AS $cnItems)
{

}

You can then see what type of child it is, or what tag it represents

foreach($doc->child_nodes( ) AS $cnItems)
{
echo $cnItems->node_type();
echo $chItems->node_name();
}

Again, if the node is a parent node then you can use the foreach structure
on it

foreach($doc->child_nodes( ) AS $cnItems)
{
if($cnItems->has_child_node s())
{
foreach($cnItem s->child_nodes( ) as $cnSubItems)
{
echo $cnSubItems->node_name();
}
}
}