Giving ids to nested xml data attributes, in php - php

Question

I've got a data feed I'm importing that has a load of 'markets', I want to have a main page displaying all the markets, so for that id use a foreach loop to go through the data and on each market make a listing.
Each market has a bunch of attributes as well as nested participants, I want to then make a page for each market, that displays some information about each participant.
So the user would navigate to index.php > event.php?id101
This is the bit were ive become stuck, how can i send the user to the right page, I was thinking of using
<?php
$xml = simplexml_load_file('f1_feed.xml');
foreach($xml->response->williamhill->class->type->market as $event) {
$event_attributes = $event->attributes();
echo "<tr>";
// EVENT NAME WRAPPED IN LINK TO EVENT
echo "<td>";
echo '<a href="event.php?id=' . $market_id . '">';
echo $event_attributes['name'];
echo "</a>";
echo"</td>";
// DATE
echo "<td>";
echo $event_attributes['date'];
echo "</td>";
echo "</tr>";
}
?>
but how can I set a var $market_id (from the xml feed) to add to the end of the url, so it sends me to the right page ?
(f1_feed.xml is the same as the live xml feed, its just local for development)
the feed I'm using is http://whdn.williamhill.com/pricefeed/openbet_cdn?action=template&template=getHierarchyByMarketType&classId=5&marketSort=HH&filterBIR=N
which im bring in using simplexml

Answer 1

This worked for me;
$xml = simplexml_load_file("openbet_cdn.xml");
foreach($xml->response->williamhill->class->type->market as $market) {
// that gives an object (native)
$market_attributes = $market->attributes();
printf("%s\n",
$market_attributes->id,
$market_attributes->name);
// that gives an array (useless way!)
// $market_attributes = (array) $market->attributes();
// printf("%s\n",
// $market_attributes['#attributes']['id'],
// $market_attributes['#attributes']['name']);
}