$path = 'path.mp3';
 $path1 = 'path1.mp3';
 $mp3 = new PHPMP3($path);
 
 $newpath = 'path.mp3';
$mp3->striptags();
 
$mp3_1 = new PHPMP3($path1);
$mp3->mergeBehind($mp3_1);
  $mp3->striptags();
 
 $mp3->setIdv3_2('01','Track Title','Artist','Album','Year','Genre','Comments','Composer','OrigArtist','Copyright','url','encodedBy');
 
$mp3->save($newpath);