[Twitch] Get m3u8

<?php
/**
 *
 * Get Twitch m3u8 file
 *
 * @author    EchtkPvL <dev@echtkpvl.de>
 * @version   0.1.0
 * @copyright 18.02.2018 EchtkPvL
 */
$streamer = '<streamer>';
$clid = '<client id>'; // https://dev.twitch.tv/docs/v5#getting-a-client-id

$opts = [
  "http" => [
    "method" => "GET",
    "header" => "Accept: application/vnd.twitchtv.v5+json\r\n".
                "Client-ID: ".$clid."\r\n"
  ]
];
$context = stream_context_create($opts);
$access_token = file_get_contents('http://api.twitch.tv/api/channels/'.$streamer.'/access_token', false, $context);
$decoded = json_decode($access_token, true);

$url = 'http://usher.twitch.tv/api/channel/hls/'.$streamer.'.m3u8?player=twitchweb&token='.$decoded['token'].'&sig='.$decoded['sig'].'&allow_audio_only=true&allow_source=true&type=any&p='.rand(100000,999999);
$m3u8 = file_get_contents($url);

$regex_video = '/#[^,]*,GROUP-ID="([^"]*)",[^,]*,[^#]*\n#[^,]*,[^,]*,RESOLUTION=([^,]*),CODECS="[^"]*",VIDEO="(\1)"\n([^\n]*)/';
$regex_audio = '/#[^,]*,GROUP-ID="([^"]*)",[^,]*,[^#]*\n#[^,]*,[^,]*,CODECS="[^"]*",VIDEO="(\1)"\n([^\n]*)/';
preg_match_all($regex_video, $m3u8, $array_video, PREG_SET_ORDER);
preg_match_all($regex_audio, $m3u8, $array_audio, PREG_SET_ORDER);

echo $array_audio[0][3].PHP_EOL;