anonymess.php

<?
$music()->
   filter(function ($value,$key) {
     if(strtolower($key) == 'music type' && strtolower($value) == 'jazz')
     {
        return true;
     } else {
        return false;
     })-> 
   pluck('title')->
   sortBy('title')->
   each(function($song) {
     return ucfirst(strtolower($song['title']));
   });