Youtube Streamer PHP Side

<?php
$videoid = $_GET['videoid'];
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "www.youtube-mp3.org/api/itemInfo/?video_id=".$videoid);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$infolink = curl_exec($ch);
curl_close($ch);
$hash = substr($infolink,strpos($infolink, "\"h\" : \"")+7,32);
$dosya = "http://www.youtube-mp3.org/get?video_id=".$videoid."&h=".$hash;
$isim = basename($dosya);
header("content-type:audio/mpeg");
header("content-disposition: attachment; filename=".$isim);
readfile($dosya);
?>