回答

这个代码不对，改成下面的写法就可以了

<?php

$filename = "/data/wwwroot/default/Data/video.mp4"; //路径文件名
$file = "https://repo.bfw.wiki/bfwrepo/video/modushanghai.mp4";
download_img($file, $filename);

function download_img($url, $filename) {
    // $COOKIE_file = dirname(__FILE__).'/COOKIE.txt';
    $ch = curl_init ();
    curl_setopt ($ch, CURLOPT_CUSTOMREQUEST, 'GET');
    curl_setopt ($ch, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt ($ch, CURLOPT_URL, $url);
    // curl_setopt($ch, CURLOPT_COOKIEFILE,$COOKIE_file);
    ob_start ();
    curl_exec ($ch);
    $return_content = ob_get_contents ();
    ob_end_clean ();

    $return_code = curl_getinfo ($ch, CURLINFO_HTTP_CODE);
    $fp = @fopen($filename, "a");
    fwrite($fp, $return_content);
    return true;
}