rewriting existing information in mysql

[auriaks]

Hi, I have sql table named: THEME, and line in it, named: Thh, were i saved Thh variable from form. Can someone explain what Form script do i need to rewrite information in Thh. For example: Thh was badboy, but when i went to my webpage i want to change it to goodboy what script i have to use? MANY THANKS

[traq]

form.html

...
<form action="processform.php" method="post">
    <input type="text" name="Thh">
<!--OR THIS INSTEAD (comment out above <input> and uncomment this to use)
    <select name="Thh">
        <option value="badboy">Bad Boy</option>
        <option value="goodboy">Good Boy</option>
    </select>
-->
<!--then submit the form-->
    <input type="submit" value="submit">
</form>
...

processform.php

if(isset($_POST['Thh'])){
    $Thh = $_POST['Thh'];
    $Thh = addslashes($Thh);
    $id = '';  // id of the row you want to update
    // IMPORTANT!  if you don't specify a row, ALL ROWS will be updated!
    $SQL = "UPDATE theme SET Thh = '$Thh' WHERE id ='$id' ";
    // This assumes you've already connected to your DB
    if(mysql_query($SQL)){ echo 'Success!'; }else{ echo 'Failure.'; }

    // if you used the <select> on the form you can easily validate the user's input 
    // (comment out the lines above and uncomment these):
    // $OKvalues = array('badboy','goodboy');
    // if(in_array($_POST['Thh'], $OKvalues)){
    //    $Thh = $_POST['Thh'];
    //    $id = ''; // id of the row you want to update
    //    $SQL = "UPDATE theme SET Thh = '$Thh' WHERE id ='$id' ";
    //    if(mysql_query($SQL)){ echo 'Success!'; }else{ echo 'Failure.'; }
    // }
}