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Having problems updating using drop-down menu

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Hi guyz, i have trouble in updating my data using drop-down menus...im trying to upgrade a subscribers ServiceType....but its seems i have so problems... i don't know whats wrong with it here is a part of my script:

-------script for querying---------


    if((!isset($_GET['id']) || trim($_GET['id']) == ''))
            die('Missing record ID!');

    $connection = mysql_connect(DB_SERVER, DB_USER, DB_PASS) or die('Unable to connect!');
    mysql_select_db(DB_NAME) or die('Unable to select database');
    $id = $_GET['id'];
    $q = "SELECT username, ServiceType FROM subscription WHERE username = '$id'";
    $w = mysql_query($q) or die("Error in query: $q. " . mysql_error());
        $query  = "UPDATE subscription SET ServiceType = '" . $_POST['service'] . "' WHERE username = '$id'";
    $result = mysql_query($query) or die("Error in query: $query. " . mysql_error());
      header("Location: updatesuccess.php");
?>    [/code]

-----html drop down menu declaration----------
<select name="service">
          <option value="NR5">NR5</option>
          <option value="NR10">NR10</option>
          <option value="NR15">NR15</option>
          <option value="NR20">NR20</option>
          <option value="NR25">NR25</option>
          <option value="NR30">NR30</option>
          <option value="NR40">NR40</option>
          <option value="NR50">NR50</option>
          <option value="NR60">NR60</option>
          <option value="NR80">NR80</option>
          <option value="NR100">NR100</option>
          <option value="NR120">NR120</option>
          <option value="R10">R10</option>
          <option value="R20">R20</option>
          <option value="R30">R30</option>
          <option value="R40">R40</option>
          <option value="R50">R50</option>
          <option value="R60">R60</option>
          <option value="R80">R80</option>
          <option value="R100">R100</option>
          <option value="R120">R120</option>


------here is the submit button declaration--------
<input type="submit" name="change"  value="Upgrade">

hmmm i'm quite puzzled...wondering where did i go wrong pls help...thank you

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[!--quoteo--][div class=\'quotetop\']QUOTE[/div][div class=\'quotemain\'][!--quotec--]

Try changing your form to [b]method = 'GET' [/b]and make sure your variables are in the address bar correctly.


oh yeah i have'nt tried that ^_^ and about the address bar the variables are shown fine ^^...but the thing is everytime i press the button

it says:

"Missing record ID"

but my address bar where shown like this for example:(i know you got my point ^_^)


Step 1

1. source.php <-----where the variables came from

Step 2
2. geting.php?id=chicken <------where the variables were transfered and data chickens information was displayed here...yet when i press the button in the geting.php page....click....then "Missing record ID" (T_T)
come to think of it the variables where shown in both the address bar and at the status bar

im puzzled pls help tnx...

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Here is what I've come up with.
[code] //$user = $_POST['user']
             $url = $_SERVER["PHP_SELF"];
                echo "<form method=\"get\" name=\"userselection\" action=\"$url\">";
                echo '<select size="1" name="user" onchange="forms[\'userselection\'].submit()"> ';
                      /* Output combo box */
                    echo("<option value=");
                    echo( $value );
                           echo " selected=true";
                    echo( $value );
                echo '</form>';[/code]

When you select a different item in the combobox, the page gets reloaded and you get the new value from the $_POST on witch you can readjust the data on your page (and reput the combobox on the selected item)

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