大佬写的代码真棒，存起来。

版本一

<?php
    $cache = new Cache(3600,"cache/");
    $playUrl = $cache->get('cctv4k_cache');
    if(!$playUrl)
    {
        $bstrURL = "https://ytpvdn.cctv.cn/cctvmobileinf/rest/cctv/videoliveUrl/getstream";
        $postData = 'appcommon={"ap":"cctv_app_tv","an":"央视投屏助手","adid":"1234123122","av":"1.1.7"}&url=http://live-tp4k.cctv.cn/live/4K0219.stream/playlist.m3u8';
        //4K高清 = 4K10M.stream //4K超高清 = 4K0219.stream
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        curl_setopt($ch, CURLOPT_URL, $bstrURL);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
        curl_setopt($ch, CURLOPT_HTTPHEADER,array("User-Agent: cctv_app_tv","Referer: api.cctv.cn","UID: 1234123122"));
        curl_setopt($ch, CURLOPT_POST, TRUE);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);
        $data = curl_exec($ch);
        
        curl_close($ch);
        $obj = json_decode($data);
        $playUrl = $obj->url;

        $playUrl = str_replace("playlist.m3u8","1.m3u8",$playUrl);
        $cache->put('cctv4k_cache',$playUrl);
    }

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt($ch, CURLOPT_URL, $playUrl);
    curl_setopt($ch, CURLOPT_HTTPHEADER,array("User-Agent: cctv_app_tv","Referer: api.cctv.cn","UID: 1234123122"));
    $data = curl_exec($ch);
    curl_close($ch);

    $data = preg_replace('/(.*?.ts)/i',"http://livews-tp4k.cctv.cn/live/4K0219.stream/$1",$data);

    header("Content-Disposition:attachment;filename=playlist.m3u8");
    echo $data;
    exit;

    // 以下缓存类来自互联网，请确保cache目录存在以及读写权限 //
    class Cache {

        private $cache_path;
        private $cache_expire;
        public function __construct($exp_time=3600,$path="cache/"){
            $this->cache_expire=$exp_time;
            $this->cache_path=$path;
        }

        private function fileName($key){  return $this->cache_path.md5($key); }
        public function put($key, $data){

            $values = serialize($data);
            $filename = $this->fileName($key);   
            $file = fopen($filename, 'w');
            if ($file){

                fwrite($file, $values);
                fclose($file);
            }
            else return false;
        }

        public function get($key){

            $filename = $this->fileName($key);

            if (!file_exists($filename) || !is_readable($filename)){ return false; }

            if ( time() < (filemtime($filename) + $this->cache_expire) ) {

                $file = fopen($filename, "r");

                if ($file){

                    $data = fread($file, filesize($filename));
                    fclose($file);
                    return unserialize($data);
                }
                else return false;

            }
            else return false;
        }
    }
?>

playlist是referer防盗链，ts流是没有(暂时，大概，也许可能吧).以后的事以后再说.

cache 在目录下创建一个这个文件夹，777权限，可以加入以下代码，但浪费性能，还是直接手动好。

$dir="cache/";
if (!file_exists($dir)){
mkdir ($dir,0777,true);
}
$cache = new Cache(3600,$dir);

版本二

<?php
    // c4k 切片版
    $seq = intval((time()-1830)/4);
    $content = "#EXTM3U\n#EXT-X-VERSION:3\n#EXT-X-TARGETDURATION:5\n#EXT-X-MEDIA-SEQUENCE:$seq\n";
    for($i=0;$i<3;$i++)
    {
        $content .= "#EXTINF:4.000,\n";
        $content .= "http://livews-tp4k.cctv.cn/live/4K0219.stream/1-".$seq.".ts\n";
        $seq = $seq + 1;
    }
    header("Content-Disposition: attachment; filename=playlist.m3u8");
    echo $content;

?>

code by @wjxgzz