在php中限制已经与ftp连接的用户

Question

我将每10秒运行一次cron作业来连接和复制文件然后删除。 我不会在复制文件的同时运行cron等等，这是最好的方法吗？

我可以限制已连接的用户吗？

try {
    $con = ftp_connect($server);
    if (false === $con) {
        throw new Exception('Unable to connect');
    }

    $loggedIn = ftp_login($con,  $username,  $password);
    if (true === $loggedIn) {
        echo 'Success!';
    } else {
        throw new Exception('Unable to log in');
    }

    print_r(ftp_nlist($con, "."));
    ftp_close($con);
} catch (Exception $e) {
    echo "Failure: " . $e->getMessage();
}

Answer 1

if a certain file doesnt exist
    make the file
    do stuff
    delete file
else if the file exists, but its very old
    recreate the file
    do stuff
    delete file
else
    its busy

如果ftp软件本身允许你限制它，我不会感到惊讶。可能想检查一下。