<?PHP

$playlist = array("Be more.mp3","Drift Away.mp3","Panda Sneeze.mp3");

function add_songs_playlist() {

global $playlist;
?>

<form method = "post">
<input type = "text" name = "name1"/>
<input type = "submit" name = "submit1"/>
</form>

<?PHP

if (isset($_POST['submit1'])) {
$newsong = $_POST['name1'];
array_push($playlist,$newsong);

}
}

add_songs_playlist();

foreach ($playlist as $value) {

echo $value."<br>";
}