PHP - Dividir texto a partir de un símbolo

<?php

$title = 'Whirlpool Productions - From Disco To Disco.mp3';

$separador = '-';

$artista = substr($title,0, strpos($title, $separador)-1);

$tema = substr($title,strpos($title, $separador)+2,-4);

echo "<br />\n";

echo "$artista";

echo "<br />\n";

echo "$tema";

?>

<?php

 $buscar  = array(

    '.mp3' => '',

    '–' => '-',

    'Feat.' => 'feat.',

    'ft.' => 'feat.',

    'Ft.' => 'feat.'

 );

 $title = strtr("Whirlpool Productions - From Disco To Disco.mp3", $buscar);

 $parte = explode(" - ", $title);

 echo "<br />\n";

 echo $parte[0];

 echo "<br />\n";

 echo $parte[1];

?>

$buscar       = array(

    ' ' => '_',

    '%' => 'ò',

    '>' => 'è',

    ':' => 'à',

    '.' => 'ì'

);

$disco        = (isset($_POST['disco'])) ? strtr($_POST['disco'], $buscar) : "";