<h1>Encrypter</h1>
<form method="post" action="<?php echo $_SERVER['PHP_SELF'];?>">
    <fieldset>
        <input type="text" name="p" size="50" maxlength="200" />
        <input type="submit" value="Encrypt" />
    </fieldset>
</form>
<br />
<?php 
if(@$_POST['p'])
{
    $crypted = crypt(@$p);
    echo $crypted;
}