First and Second last xml nodes - php

Question

I only want the first and the second last Area nodes - how would I do that here?
$url = "http://developer.multimap.com/API/geocode/1.2/OA10081917657704697?qs=Byker&countryCode=GB";
$results = simplexml_load_file($url);
foreach($results->Location as $location) {
echo "<hr />";
foreach($location->Address as $address) {
foreach($address->Areas as $areas) {
foreach($areas->Area as $area) {
echo $area;
echo "<br />";
}
}
}
}

Answer 1

Update: If you have those foreach-loops anyway you can simply use:
$url = "http://developer.multimap.com/API/geocode/1.2/OA10081917657704697?qs=Byker&countryCode=GB";
$results = simplexml_load_file($url);
foreach($results->Location as $location) {
foreach($location->Address as $address) {
foreach( $address->Areas as $areas) {
// <-- todo: add test if those two elements exist -->
echo $areas->Area[0], ' - ', $areas->Area[count($areas->Area)-1], "\n";
}
}
}
You can use XPath for this.
<?php
$doc = new SimpleXMLElement('<foo>
<bar>a</bar>
<bar>b</bar>
<bar>c</bar>
<bar>x</bar>
<bar>y</bar>
<bar>z</bar>
</foo>');
$nodes = $doc->xpath('bar[position()=1 or position()=last()-1]');
foreach( $nodes as $n ) {
echo $n, "\n";
}
prints
a
y
see also:
PHP Manual: SimpleXMLElement::xpath()
XPath: predicates
XPath: position()
XPath: last()

Answer 2

Here it is:
<?php
$url = 'http://developer.multimap.com/API/geocode/1.2/OA10081917657704697?qs=Byker&countryCode=GB';
$results = simplexml_load_file($url);
$areas = array();
foreach ($results->Location->Address->Areas->Area as $area)
{
$areas[] = (string) $area;
}
$first = $areas[0];
$second_last = $areas[count($areas)-2];
?>