如何使用PHP通过FTP从文件获取chmod权限

Question

I am working on something which uses FTP but I need to get the existing chmod permissions of each file. How can I achieve this?

I have tried the fileperms() function, but that seems to only work with local files.

Answer 1

If you are using PHP 7.2 and newer and your FTP server supports MLSD command, it's easy, as you can use ftp_mlsd function.

$conn_id = ftp_connect("ftp.example.com") or die("Cannot connect");
ftp_login($conn_id, "username", "password") or die("Cannot login");
ftp_pasv($conn_id, true) or die("Cannot change to passive mode");

$entries = ftp_mlsd($conn_id, "/remote/path") or die("Cannot list directory");

foreach ($entries as $entry)
{
    if (($entry["type"] != "cdir") && ($entry["type"] != "pdir"))
    {
        echo $entry["name"] . " - " . $entry["UNIX.mode"] . "
";
    }
}

---

If not, you have to use LIST command using ftp_rawlist function and parse a proprietary format that the server returns.

The following code assumes a common *nix format.

$entries = ftp_rawlist($conn_id, "/remote/path") or die("Cannot list directory");

foreach ($entries as $entry)
{
    $tokens = explode(" ", $entry);
    $name = $tokens[count($tokens) - 1];
    $permissions = $tokens[0];
    echo $name . " - " . $permissions . "
";
}