container.php
<?php
$audio_file = urldecode(filter_input(INPUT_GET,'a',FILTER_SANITIZE_STRING));
$type = filter_input(INPUT_GET,'t',FILTER_SANITIZE_STRING);
if (empty($audio_file)) {
die();
}
if ($type!=='audio' and $type!=='video') {
die();
}
?>
<!DOCTYPE html>
<html>
<body>
<style type="text/css">
<?php echo $type;?> {
width:100%;
max-width:600px;
height:auto;
}
</style>
<<?php echo $type;?> width="100%" controls>
<source src="<?php echo $audio_file;?>" type="audio/mp3">
Your browser does not support audio
</video>
</body>
</html>