php下载大文件时错误怎么办

$file = BASE_PATH . '/public/files/IMG_5727.jpg';
$size = filesize($file);
header( "Content-type: application/octet-stream" );
header("Accept-Ranges: bytes");
header("Accept-Length: {$size}");
header("Content-Disposition: attachment; filename=IMG_5727.jpg");
$fp = fopen($file, 'rb');
$readBuffer = 4096;
while (!feof($fp)) {
    echo fread($fp, $readBuffer);
}
fclose($fp);

2020/05/06 13:09:13 [crit] 1482#0: *23258 open() "/aichenk/soft/nginx/fastcgi_temp/4/17/0000000174" failed (13: Permis
sion denied) while reading upstream, client: 172.21.0.12, server: 192.168.5.5, request: "GET /temp/t2 Http/1.1", upstr
eam: "fastcgi://127.0.0.1:9001", host: "192.168.5.5:8080"

# fpm配置
[www]
user = daemon
group = daemon
 
# 查看到fpm运行身份为`daemon`,编辑nginx配置设置身份
 
# nginx配置
#user  nobody;
user daemon;

chown -R daemon /aichenk/soft/nginx/fastcgi_temp/