snippetsmania.com
Post and share your code snippets

/*
* Return an UL of album covers for a user's recent tracks from Last.fm
* TODO: find some way to periodically clean up the local album cover cache (cron job?)
*/
function GetLastfm($user, $limit){

#first, try to get the cache file
$lastfmCacheDir = './cache/lastfm/';
$filename = $lastfmCacheDir . 'lastfm';
if (file_exists($filename)) {
$filedate = filemtime($filename);
$FileAge = time() - $filedate;
if($FileAge < 3600){
#cache is < 1 hour old
return file_get_contents($filename);
}
}

#get the URL to the cache directory, for serving up images
$thispath = $_SERVER['REQUEST_URI'];
$thispath = explode('/', $thispath);
$lastfmCacheUrl = $thispath[count($thispath)-2] . '/cache/lastfm/';

#get 20 items, then show the first $limit that have album images (not all will have images)
$recentTracksUrl = 'http://ws.audioscrobbler.com/2.0/?method=user.getrecenttracks&user=' . $user . '&limit=20&api_key=[your api key]';

$count = 0;

#load the dom with last.fm response
$dom = new DOMDocument();
$dom->load($recentTracksUrl);

#get all tracks and loop
$xPath = new DOMXPath($dom);
$tracks = $dom->getElementsByTagName("track");
$result = '<ul class='lastfm'>';
foreach($tracks as $track){
$songname = $track->getElementsByTagName('name')->item(0)->nodeValue;
$artist = $track->getElementsByTagName('artist')->item(0)->nodeValue;
$url = $track->getElementsByTagName('url')->item(0)->nodeValue;
$imgurl = $track->getElementsByTagName('image')->item(1)->nodeValue;
if($imgurl != ''){
#make a local copy of the image for serving from the cache
$gotlocalcopy = false;
$localfilename = file_name_from_url($imgurl);
if (!file_exists($lastfmCacheDir . $localfilename)) {
$gotlocalcopy = cURLdownload($imgurl, $lastfmCacheDir . $localfilename);
}
else { $gotlocalcopy = true; }
#make sure we got it
if ($gotlocalcopy) {
$result .= "<li><a href='$url' target='_blank'><img src='$lastfmCacheUrl$localfilename' alt='$artist - $songname' title='$artist - $songname'/></a></li>";
$count = $count + 1;
}
}
if($count == $limit){ break; }
}
$result .= '</ul>';

#write out cache file for use next time
file_put_contents($filename, $result);

return $result;
}

/*
* Adapted from code found in php documentation comments
*/
function cURLcheckBasicFunctions()
{
if( !function_exists("curl_init") &&
!function_exists("curl_setopt") &&
!function_exists("curl_exec") &&
!function_exists("curl_close") ) return false;
else return true;
}
function cURLdownload($url, $file)
{
if( !cURLcheckBasicFunctions() ) return false;
$ch = curl_init();
if($ch)
{
$fp = fopen($file, "w");
if($fp)
{
if( !curl_setopt($ch, CURLOPT_URL, $url) ) return false;
if( !curl_setopt($ch, CURLOPT_FILE, $fp) ) return false;
if( !curl_setopt($ch, CURLOPT_HEADER, 0) ) return false;
if( !curl_exec($ch) ) return false;
curl_close($ch);
fclose($fp);
return true;
}
else return false;
}
else return false;
}

/*
* Adapted from code found in php documentation comments
*/
function file_name_from_url($url) {
if($url===null || strlen($url)<= 0) {
return null;
}
$url= explode('?', $url);
$url= explode('/', $url[0]);
$basename= $url[count($url)-1];

return $basename;
}

source