<?php

function dd($data)
{
    echo '<pre>';
    var_dump($data);
    echo '</pre>';
    exit();
}

$opts = [
    "http" => [
        "method" => "GET",
        "header" => "Accept: */*\r\n
Accept-encoding: gzip, deflate, br\r\n
Accept-language: ru-RU,ru;q=0.9,en-US;q=0.8,en;q=0.7\r\n
Origin: https://vk.com\r\n
Referer: https://vk.com/\r\n
Sec-ch-ua: \"Chromium\";v=\"94\", \"Google Chrome\";v=\"94\", \";Not A Brand\";v=\"99\"\r\n
Sec-ch-ua-mobile: ?0\r\n
Sec-ch-ua-platform: \"Windows\"\r\n
Sec-fetch-dest: empty\r\n
Sec-fetch-mode: cors\r\n
Sec-fetch-site: cross-site\r\n
User-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.71 Safari/537.36"
    ]
];
$context = stream_context_create($opts);

$ee = file_get_contents("https://psv4.vkuseraudio.net/audio/ee/s4_jzslYORe-63YTHpOJ4Moky6jGN5g4eYFfIA/c9Oj4_MDA2MDMx/5dN1RWUWlkYUVKUnM/index.m3u8?extra=gVaP4SWomDKiSZP84WiL6vyytBKbVRbFHhqi7Z3345oEfEzNqURU2e5GFocslJsirVHx9tg8pLDloKoY7HXiNoRTa45FJS8xAaeJ1t3sAUnD3GpBeChHPKYiP9tIuxoqURoK_2VjpTd4n2QG8Z8", false, $context);
$playlist = explode("\n", $ee);
$file = '';
$enc = null;
$passphrase = null;
for ($i = 0; $i < count($playlist); $i++) {
    if (preg_match("/URI/si", $playlist[$i]))
        $file = preg_replace("/(.*)URI=\"(.*)key.pub(.*)/si", "$2", $playlist[$i]);
    if (preg_match("/#EXT-X-KEY:METHOD=/si", $playlist[$i])) {
        if (preg_match("/NONE/si", $playlist[$i])) $enc = null;
        else {
            $enc = 'aes';
            if (!$passphrase) {
                $passphrase = file_get_contents(
                    trim(str_replace('#EXT-X-KEY:METHOD=AES-128,URI=', "", $playlist[$i]), '"'),
                    false,
                    $context
                );
            }
        }
    }
    if (preg_match("/#EXTINF:/si", $playlist[$i])) {
        $tmpfile = $file . $playlist[$i + 1];
        $partfile = file_get_contents($tmpfile, false, $context);
        $partname = explode("?", basename($tmpfile))[0];
        file_put_contents('./test/' . $partname, $partfile);
        if ($enc) {
            $cypher = 'AES-128-CBC';
            $ivSize = openssl_cipher_iv_length($cypher);
            $handle = fopen('./test/' . $partname, "rb");
            $iv = fread($handle, $ivSize);
            $ciphered_data = fread($handle, filesize('./test/' . $partname));
            fclose($handle);
            file_put_contents('./test/d_' . $partname, openssl_decrypt(
                $ciphered_data,
                $cypher,
                $passphrase,
                OPENSSL_RAW_DATA,
                $iv
            ));
            break;
        }
    }
}