PHP XML XPath - Stop duplicate nodes

MHeywood

Im trying to parse an XML document using the XPath element in simple XML. However this script below (When searching for the entry "U2" in the last.fm API) returns:

Passengers Passengers Bono Passengers Bono U2 and Green Day Passengers Bono U2 and Green Day R.E.M. Passengers Bono U2 and Green Day R.E.M. INXS

As you can see there are repeating nodes. Is there a way that I can stop duplicate/repeating nodes from being shown?

(PHP Code - relevant part)

$xmlmusic = new SimpleXMLElement($result);
$releases = $xmlmusic->xpath('artist/similar/artist');
foreach ($releases as $artist) {
$artistResult .= $artist->name . PHP_EOL;
echo $artistResult;}

(XML Document - relevant part)

<?xml version="1.0" encoding="utf-8"?>
<lfm status="ok">
<artist>
<name>U2</name>
<mbid>704acdbb-1415-4782-b0b6-0596b8c55e46</mbid>
<url>http://www.last.fm/music/U2</url>
<image size="small">http://userserve-ak.last.fm/serve/34/107345.jpg</image>
<streamable>1</streamable>
<stats>
<listeners>2613654</listeners>
<playcount>96947986</playcount>
</stats>

<similar>
<artist>
<name>Passengers</name>
<url>http://www.last.fm/music/Passengers</url>
<image size="small">http://userserve-ak.last.fm/serve/34/4826014.jpg</image>
</artist>

Derokorian

foreach ($releases as $artist) {
$artistResult .= $artist->name . PHP_EOL;
echo $artistResult;}

This loops concatenates a string onto itself, then echos it... each time thru the loop. This seems like an error, either echo it in the loop, or concatenate the string and echo it outside the loop. But maybe I'm misunderstanding the problem / what you're doing.