ftp_nlist

<?php

// set up basic connection
$conn_id = ftp_connect($ftp_server);
$login_result = ftp_login($conn_id, $ftp_user_name, $ftp_user_pass);

// check connection
if ((!$conn_id) || (!$login_result)) {
    die("FTP connection has failed !");
}

// get contents of the root directory
$contents = ftp_nlist($conn_id, "/");

// print each entry
foreach ($contents as $entry) {
    echo $entry, "<br />\n";
}

?>