Secure FTP file download

Question

I'm trying to download the most recent file with the extension add.zip via ftp

I'll preface this by saying I am not well versed in php and have created this frankenstein piece of code from a scattering of other codes.

here is my code

<?php

// set up basic ssl connection
$ftp = ftp_ssl_connect('myremotesite.com');

// login with username and password
$login_result = ftp_login($ftp, 'username', 'password');

if (!$login_result) {
    // PHP will already have raised an E_WARNING level message in this case
    die("can't login");
}

// get list of files on given path
$files = ftp_nlist($ftp, '/1668161919_DATA/*add.zip') or die("Could not find file");

$mostRecent = array(
    'time' => 0,
    'file' => null
);

foreach ($files as $file) {
    // get the last modified time for the file
    $time = ftp_mdtm($ftp, $file);
    

    if ($time > $mostRecent['time']) {
        // this file is the most recent so far
        $mostRecent['time'] = $time;
        $mostRecent['file'] = $file;
    }
}


ftp_get($ftp, "/home/mysite/public_html/wp-content/uploads/data-zipped/target.zip", $mostRecent['file'], FTP_BINARY);
ftp_delete($ftp, $mostRecent['file']);
ftp_close($ftp);
?>

After some testing

<?php

// set up basic ssl connection
$ftp = ftp_ssl_connect('myremotesite.com');

// login with username and password
$login_result = ftp_login($ftp, 'username', 'password');

if ($login_result === TRUE) {
  echo 'woot!';
} else {
  echo 'doh!';
}

Returns a woot

but

// set up basic ssl connection
$ftp = ftp_ssl_connect('myremotesite.com');

// login with username and password
$login_result = ftp_login($ftp, 'username', 'password');

// get list of files on given path
$files = ftp_nlist($ftp, '/1668161919_DATA/*add.zip');

if ($files === TRUE) {
  echo 'files found!';
} else {
  echo 'doh! files not found';
}

?>

Cause a 504 error with no further information.

What am I doing wrong?

When I copy the URL to clipboard in FileZilla the data is sftp://[email protected]/1668161919_DATA

Am I even close to getting this right?

When I have tried using similar FTP file downloads in the past, it was with

ftp_connect

This is the first time I have been forced to use

ftp_ssl_connect

---

Ok, so I set up a testing environment and ran the script using ftp_connect instead of ftp_ssl_connect and the code worked fine.

I think I need to define my port as 22. But

$ftp = ftp_ssl_connect('myremotesite.com','22')

doesn't work. Can anyone assist?