EasyLASTFM.class.php

<?php

class EasyLASTFM
{
  const ENDPOINT  = 'http://ws.audioscrobbler.com/2.0/';
  const URL       = 'https://www.last.fm/music/';
  const API_KEY   = '';
  const CACHETIME     = '86400'; // 24 hours in seconds

  private function create_dir($path) {
    if ( !is_dir( $path ) ) {
      mkdir( $path, 0755, true);
    }
  }

  private function generate_url($method, $args) {
    $str = '&';

    foreach ($args as $key => $value) {
      $str .= $key . '=' . $value . '&';
    }

    $url = self::ENDPOINT . '?method=' . $method . '&extended=1&&api_key=' . self::API_KEY . $str;

    return $url;
  }

  public function get_latest_tracks($args) {
    $dir = 'cached-files/';
    $cachefile = $dir . date( 'mdY' ) . '.txt';

    if( file_exists($cachefile) && time() - self::CACHETIME < filemtime($cachefile) ) {
   	  $tracks = file_get_contents( $cachefile );
      $tracks = json_decode( $tracks );
    } else {
      $tracks = file_get_contents( $this->generate_url( 'user.getrecenttracks', $args ) );

      $this->create_dir( $dir );

      file_put_contents( $cachefile, $tracks );
      $tracks = json_decode( $tracks );
    }

    return $tracks->recenttracks->track;
  }

  public function get_latest_loved_tracks($args) {
    $dir = 'cached-files/';
    $cachefile = $dir . date( 'mdY' ) . '.loved.txt';

    if( file_exists($cachefile) && time() - self::CACHETIME < filemtime($cachefile) ) {
   	  $tracks = file_get_contents( $cachefile );
      $tracks = json_decode( $tracks );
    } else {
      $tracks = file_get_contents( $this->generate_url( 'user.getLovedTracks', $args ) );

      $this->create_dir( $dir );

      file_put_contents( $cachefile, $tracks );
      $tracks = json_decode( $tracks );
    }

    return $tracks->lovedtracks->track;
  }

  public function get_album_url($album, $artist) {
    $album_uri = str_replace( ' ','+', $album );
    $artist_uri = str_replace( ' ','+', $artist );

    return self::URL . $artist_uri . '/' . $album_uri;
  }
}