download youtube video to server

download.php

<?php
preg_match("/^(?:http(?:s)?:\/\/)?(?:www\.)?(?:m\.)?(?:youtu\.be\/|youtube\.com\/(?:(?:watch)?\?(?:.*&)?v(?:i)?=|(?:embed)\/))([^\?&\"'>]+)/","https://www.youtube.com/watch?v=W8drxRl1fiY",$gtlk);
//echo $gtlk[1];
$fg = file_get_contents("https://www.youtube.com/get_video_info?video_id=".$gtlk[1]."&cpn=CouQulsSRICzWn5E&eurl&el=adunit");
$xp = explode(",",$fg);
parse_str($xp[0],$rst);
$url = $rst['url_encoded_fmt_stream_map'];
parse_str($url,$hasil);
echo $judul =  $rst['title']; //get title
echo "<br><hr>";
echo $urlvid =  $hasil['url']; // get url
file_put_contents($judul."satu.3gp",fopen($urlvid,'r'));
echo "sukses";

?>