Try to plan your extension before you start writing your code.
A good way to do this is to write a sample PHP script that illustrates
how your extension is going to be accessed from a PHP script.
<?php
xmms_start();
if(isset($url)) {
xmms_url($url);
$len = xmms_playlist_length();
xmms_play($len-1);
} else {
xmms_play(5);
}
$song = xmms_current();
$list = xmms_playlist(range($song['pos']-5, $song['pos']+5));
foreach($list as $pos=>$plsong) {
echo "$pos: ".$plsong['title']."<br>\n";
}
sleep(10);
xmms_stop();
?>
