newb XML question

[TNO]

Greetings,

I'm an expert when it comes to anything regarding ASP, but I'm currently using a web host that only supports php (:cough:yahoo:cough, and lucky me I've never used the language.

I'm sending variables to a php page in this form:

Map.php?map=****&id=****&path=****&x=****&y=****

I assume thats the correct way to do it,

now in the actual php page I'd like to grab those variables and put them in an XML file but I'm not confident enough in the syntax of this language and its XML parsers to do it:

<?php
//Get variables passed to this page?
icon=$_GET['id'];
map=$_GET['id'];
path=$_GET['id'];
x=$_GET['id'];
y=$_GET['id'];

//open the xml database
$doc = new DomDocument;
$doc->Load('blah/guilds.xml')

?>

From this point I'm a little stuck, how do I update XML nodes from this point? And if they don't exist, create them?

Heres the format of my XML doc:

<?xml version="1.0" encoding="ISO-8859-1"?>
<guilds>
    <icon id="####">
        <map>???</map>
        <path>http://blah</path>
        <x>100</x>
        <y>100</y>
    </icon>
    <icon id="####">
        <map>???</map>
        <path>http://blah2</path>
        <x>200</x>
        <y>200</y>
    </icon>
</guilds>

Any help you can provide would be greatly appreciated.

[NogDog]

I'm guessing this is probably a typo:

//Get variables passed to this page?
icon=$_GET['id'];
map=$_GET['id'];
path=$_GET['id'];
x=$_GET['id'];
y=$_GET['id']; 

But just in case, it should be something like:

//Get variables passed to this page?
icon=$_GET['id'];
map=$_GET['map'];
path=$_GET['path'];
x=$_GET['x'];
y=$_GET['y']; 

[NogDog]

PS: You might want to look at the SimpleXML functions.

[TNO]

Thanks for the advice, but my server is stuck on PHP 4.3.0, so SimpleXML isn't an option according to the webhost's guide on the topic.

Heres how I would generally do it in javascript:

// Load XML 
var mapxml = new ActiveXObject("MSXML2.DOMDocument.3.0");
mapxml.load("map.xml");

//Get and Test if the specific icon node exists
var test = mapxml.selectSingleNode("\guilds\icon[@id="+id+"]");

//If it does exist
if (test != null){
    //update the properties
    test.childNodes.item(0).text=map;
    test.childNodes.item(1).text=path;
    test.childNodes.item(2).text=x;
    test.childNodes.item(3).text=y;
    //save the file
    mapxml.save("map.xml");
}
//If it does not exist, create it
else{
    //define the document base tag
    var guilds = mapxml.documentElement;
    //create <icon> element
    var icon1 = mapxml.createNode(xmlNodeType.Element, "icon", "");
    //create the id for the element
    var iconid = mapxml.createAttribute("id")
    //set the value for the attribute
    iconid.value = id;
    //add the attribute to the tag
    icon1.attributes.setNamedItem(iconid)
    //append <icon id="blah"> to <guilds> 
    guilds.appendChild(icon1)
    
    //create <map> element
    var map1 = mapxml.createNode(xmlNodeType.Element, "map", "");
    //create the text node
    var map1value=mapxml.createTextNode(map)
    //append the text to the element
    map1.appendChild(map1value)
    //append <map>blah</map> to <icon>
    icon1.appendChild(map1)
    
    //create <path> element
    var path1 = mapxml.createNode(xmlNodeType.Element, "path", "");
    //create the text node
    var pathtext = =mapxml.createTextNode(path)
    //append the text to the element
    path1.appendChild(pathtext)
    //append <path>blah</path> to <icon>
    icon1.appendChild(path1)
    
    //create <x> element
    var x1 = mapxml.createNode(xmlNodeType.Element, "x", "");
    //create the text node
    var xtext = mapxml.createTextNode(x)
    //append the text to the element
    x1.appendChild(xtext)
    //append <x>blah</x> to <icon>
    icon1.appendChild(x1)

    //create <y> element
    var y1 = mapxml.createNode(xmlNodeType.Element, "y", "");
    //create the text node
    var ytext = mapxml.createTextNode(y)
    //append the text to the element
    y1.appendChild(ytext)
    //append <x>blah</x> to <icon>
    icon1.appendChild(y1)

    //save the file
    mapxml.save("map.xml");
} 

Can anyone assist with the translation? Or tell me the equivalent functions in XML DOM for PHP?