PHP CURL下载电影 response code 206

简单的php下载电影脚本，http状态码为206

下载站range不能自定义，只能传递初始值，根据下载站自行调试代码，如果能自定义range就更简单了，少了很多判断

 private function curl($url, $header)
 {
    $fh = fopen(storage_path("mp4/{$fileName}.mp4"), 'a');

    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_HTTPGET, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
    // 视频数据写入文件
    curl_setopt($ch, CURLOPT_FILE, $fh);

    $output = curl_exec($ch);
    $curlGetInfo = curl_getinfo($ch);
    // 文件总大小
    $length = data_get($curlGetInfo, 'download_content_length');
    // http状态码
    $responseCode = data_get($curlGetInfo, 'http_code');
    // 获取剩余多少
    $errorInfo = curl_error($ch);

    curl_close($ch);
    fclose($fh);

    preg_match('/\d+/', $errorInfo, $withNum);
    $withNum = data_get($withNum, 0);
    return [
        'code' => $responseCode,
        'length' => $length,
        'with' => $withNum
    ];
}

$rang = 0;
$length = 0;

// 循环获取
while (true) {
    $header = [];
    $data = $this->curl($url, $header);
    if (data_get($data, 'code') != 206) {
        echo '获取失败', PHP_EOL;
        break;
    }
    if ($rang == 0) {
        $length = data_get($data, 'length');
    }
    // 没有剩余 则下载完成
    $with = data_get($data, 'with');
    if ($with <= 0) {
        echo '获取完成', PHP_EOL;
        break;
    }
    $rang = $length - $with;
}