Код:
<html>
<head>
<style type="text/css">
body {background-color: darkgray}
</style>
</head>
<center>
<form action="check.php" method="post"><br>
Host:<input type="text" name="host"><br>
User:<input type="text" name="user"><br>
Pass:<input type="text" name="pw"><br>
<br><input type="submit" value="Check" /></table><br>
</form>
<center/>

check.php

Код:
<?php 
$host = $_POST["host"];  
$user = $_POST["user"];  
$pass = $_POST["pw"];  
$con = ftp_connect($host) or die("cant connect");  
if (@ftp_login($id, $user, $pass)) { 
   echo "<font color=blue>Working!</font>"; 
} else { 
   echo "<font color=red>Not working</font>"; 
} 

ftp_close($con);   
?>