PHP and XML, select and show only specific variables

[curlious_kathy]

Hi everyone, this is my first post here and I hope you can help me out. I am trying to display only one entry from an XML document through PHP. May sound stupid, but its part of a CMS im building which cant use databases

The XML looks like this

<?xml version="1.0" encoding="iso-8859-1"?>
<data>
<entry id="1">
<description>description of entry one</description>
</entry>
<entry id="2">
<description>description of entry two</description>
</entry>
<entry id="3">
<description>description of entry three</description>
</entry>
</data>

I would like the output to show (if id=1, display 'description of entry one')

Here is my PHP, i know my echos are incorrect but I have no idea how to get it to show what I want. I don't think this should be an impossible task!

<?php

function startElement($parser_instance, $element_name, $attrs) {
echo "<br>$element_name";
}

function characterData($parser_instance, $xml_data) {
echo "<b>$xml_data</b>";
}

function endElement($parser_instance, $element_name) {
echo "/$element_name<br />";
}

$parser = xml_parser_create();

xml_set_element_handler($parser, "startElement", "endElement");

xml_set_character_data_handler($parser, "characterData");

$filehandler = fopen("cms.xml", "r");
while ($data = fread($filehandler, 4096)) {
xml_parse($parser, $data, feof($filehandler));
}
fclose($filehandler);
xml_parser_free($parser);

?>

Thanks for any help you can give

[Installer]

Here's something to work with:

function startElement($parser_instance, $element_name, $attrs) {
    global $current;
    global $marker;
    $current .= '*' . $element_name;
    echo $current . '<br />';
    if (count($attrs)) {
        foreach ($attrs as $key => $val) {
            echo $key . ' => ' . $val . '<br />';
            if (($key == 'ID') && ($val == '1')) {
                $marker = 1;
                echo 'marker = ' . $marker . '<br />';
                break;
            }
        }
    }
}

function characterData($parser_instance, $xml_data) {
    global $current;
    global $marker;
    if (substr($current, strrpos($current, '*')) == '*DESCRIPTION') {
        if ($marker) {
            echo '<b>' . $xml_data . '</b><br />';
        } else {
            echo $xml_data . '<br />';
        }
        $marker = 0;
        echo 'marker = ' . $marker . '<br />';
    }
}

function endElement($parser_instance, $element_name) {
    global $current;
    echo '/' . $current . '<br />';
    $current = rtrim($current, '*' . $element_name);
}

$current = '';
$marker = 0;
$parser = xml_parser_create();
xml_set_element_handler($parser, 'startElement', 'endElement');
xml_set_character_data_handler($parser, 'characterData');
$filehandler = fopen('cms.xml', 'r');
while ($data = fread($filehandler, 4096)) {
    xml_parse($parser, $data, feof($filehandler));
}
fclose($filehandler);
xml_parser_free($parser);

[curlious_kathy]

thanks so much!