สอบถามวิธีแก้ครับผมงงอ่ะนั่งแก้ไม่หายเป็นมือใหม่เรื่องนี้อะครับ

<?php
if(isset($_POST['submit']))
{
    $ftp_server = '';         // Your Ftp server 
    $ftp_user_name = '';        // Your Ftp user name
    $ftp_user_pass = '';         // Your Ftp password
      
    // file to move:
    $local_file = $_FILES["filUpload"]["tmp_name"];
      
    // connect to FTP server (port 21)
    $conn_id = ftp_connect($ftp_server, 21) or die ("Cannot connect to host");
      
    // send access parameters
    ftp_login($conn_id, $ftp_user_name, $ftp_user_pass) or die("Cannot login");
      
    // turn on passive mode transfers (some servers need this)
    // ftp_pasv ($conn_id, true);
      
    // perform file upload
     
     if ($ftp_path = ftp_chdir($conn_id, "data")) {
            echo "Current directory is now: " . ftp_pwd($conn_id) . "\n";
    }
     
    $ftp_path = $_FILES["filUpload"]["name"];
    $upload = ftp_put($conn_id, $ftp_path, $local_file, FTP_BINARY);
      
    // close the FTP stream
    ftp_close($conn_id);
}
?>