php 隐藏真实播放地址输出视频流

<?php
 
$localfile = "test.mp4";
 
$size = filesize($localfile);
 
$start = 0;
$end = $size - 1;
$length = $size;
 
header("Accept-Ranges: 0-$size");
header("Content-Type: video/mp4");
 
$ranges_arr = array();
if (isset($_SERVER['HTTP_RANGE'])) {
    if (!preg_match('/^bytes=\d*-\d*(,\d*-\d*)*$/i', $_SERVER['HTTP_RANGE'])) {
        header('HTTP/1.1 416 Requested Range Not Satisfiable');
    }
    $ranges = explode(',', substr($_SERVER['HTTP_RANGE'], 6));
    foreach ($ranges as $range) {
        $parts = explode('-', $range);
        $ranges_arr[] = array($parts[0],$parts[1]);
    }
 
    $ranges = $ranges_arr[0];
    if($ranges[0]==''){
        if($ranges[1]!=''){
            //Range: bytes=-n 表示取文件末尾的n个字节
            $length = (int)$ranges[1];
            $start = $size - $length;
        }else{
            //Range: bytes=- 这种形式不合法
            header('HTTP/1.1 416 Requested Range Not Satisfiable');
        }
    }else{
        $start = (int)$ranges[0];
        if($ranges[1]!=''){
            //Range: bytes=n-m 表示从文件的n偏移量读到m偏移量
            $end = (int)$ranges[1];
        }
        //Range: bytes=n- 表示从文件的n偏移量读到末尾
        $length = $end - $start + 1;
    }
    header('HTTP/1.1 206 PARTIAL CONTENT');
}
 
header("Content-Range: bytes {$start}-{$end}/{$size}");
header("Content-Length: $length");
 
$buffer = 8096;
$file = fopen($localfile, 'rb');
if($file){
    fseek($file, $start);
    while (!feof($file) && ($p = ftell($file)) <= $end){
        if ($p + $buffer > $end) {
            $buffer = $end - $p + 1;
        }
        set_time_limit(0);
        echo fread($file, $buffer);
        flush();
    }
    fclose($file);
}
die;
 
?>