<?php
$username="chronic_*******"
$password="*******";
$database="chronic_hashes";
$con = mysql_connect(localhost,$username,$password);
$plain_text = $_POST["plaintext"];
if ($plain_text != '')
    {
    $hash = md5($plain_text);
    echo "Hash:";
    echo $hash;
    mysql_select_db("chronic_hashes",$con);
    if (!mysql_query("SELECT hash FROM md5 WHERE hash = ".$hash))
        {
        mysql_query("INSERT INTO md5 (hash, plaintext) VALUES (".$hash.", ".$plain_text));
        }
    }
else
    {
    echo "Please fill in the text form";
    }
?>