list all di.fm radio stations as a one liner @see https://gist.github.com/psychoticbeef/23b49421b0720c030786

list_di.fm_stations.php

<?php

$json = file_get_contents('http://listen.di.fm/public3');
$j = json_decode($json, true);
$l = array();
foreach ($j as $item) {
  $l []= $item['key'];
}
sort($l);
echo join(' ', $l);