ftp_site

<?php
/* Connect to FTP server */
$conn = ftp_connect('ftp.example.com');
if (!$conn) die('Unable to connect to ftp.example.com');

/* Login as "user" with password "pass" */
if (!ftp_login($conn, 'user', 'pass')) die('Error logging into ftp.example.com');

/* Issue: "SITE CHMOD 0600 /home/user/privatefile" command to ftp server */
if (ftp_site($conn, 'CHMOD 0600 /home/user/privatefile')) {
   echo "Command executed successfully.\n";
} else {
   die('Command failed.');
}
?>