Here's a quick and easy MD5 Encoder. MD5 is not meant to be de-coded, so it is good for storing passwords and private information you may need to use to verify a user, or even for generating secure keys. MD5 is NOT the most secure way of doing things, but it's still commonly used today. The form below will simply encode a piece of text to md5.

Encode MD5 With PHP - The Code (Quick 'N Dirty):

<h2>Encode Text Now:</h2>
<?php
     if ( isset($_POST['encodeThis'])) {
         echo '<h3>Encoded Value Of "'.$_POST['encodeThis'].'"</h3>
         <div class="code">'.md5($_POST['encodeThis']).'</div>';
     }
?>
<form name="userEncode" id="userEncode" method="post">
     <p><label>Text To Encode:</label></p>
     <p><input type="text" size="60" name="encodeThis" id="encodeThis" /> <input type="submit" value="Encode"/></p>
</form>

The Working Example: