Form Values

Web-Frenzy · #1 (**permalink**) 02-17-06, 06:57 AM

I am working on a custom order script for a computer website, it consists of drop down boxes. When they select an item from the dropdown box and click on the Update Price button then it shows the current subtotal. Unfortunatley when they click Update Price the dropdown boxes go back to Please Choose an Item. Here is a link to it,

http://www.acacustompcs.com/beta/ordersys/order.php

i looked all over the internet. I cant seem to find an answer on how to preserve the data they submit in this form. Help is appreciated

Thanks in advance,
Chris B

Web-Frenzy · #2 (**permalink**) 02-17-06, 06:59 AM

Here is the code.

<?php

echo'
<html>
<link href="http://www.web-frenzy.com/images/wf.css" rel="stylesheet" type="text/css">
<table class="body-text-bold-mid">
<tr>
<td>
<form method=post>
<br>Motherboards:
<br>
<SELECT name="var" class="body-text-bold-mid">
<OPTION value="0">Please choose one
<OPTION value="20">Option 1 - $20
<OPTION value="40">Option 2 - $40
<OPTION value="100">Option 3 - $100
</SELECT>
<br>
</td>
</tr>
<tr>
<td>
<br>Hard Drives:
<br>
<SELECT name="var2" class="body-text-bold-mid">
<OPTION value="0">Please choose one
<OPTION value="20" name="Option 1 - $20">Option 1 - $20
<OPTION value="40" name="Option 2 - $40">Option 2 - $40
<OPTION value="100" name="Option2 - $100">Option 3 - $100
</SELECT>
<br>
</td>
</tr>
<tr>
<td>
<input type=submit value="Update Price"></input>
</form>
</td>
</tr>
</table>
';
$var = $_POST['var'];
$var2 = $_POST['var2'];
$total = $var + $var2;
echo "Total:<b> ";
echo "$$total";
echo "</b> ";
?>

Nico · #3 (**permalink**) 02-17-06, 07:34 AM

This works for me:

PHP Code:


			
<?php



echo'

<html>

<link href="http://www.web-frenzy.com/images/wf.css" rel="stylesheet" type="text/css">

<table class="body-text-bold-mid">

<tr>

<td>

<form method=post>

<br>Motherboards:

<br>

<SELECT name="var" class="body-text-bold-mid">

<OPTION value="0">Please choose one</option>';



// Put all options in an array

$options = array(

            'Option 1 - $20' => 20,

            'Option 2 - $40' => 40,

            'Option 3 - $100' => 100

                );

        

        // Loop through the array

        foreach ($options as $option => $price)

        {

            echo '<option value="'. $price .'"';

                

                // Add a "selected" to the option where it belongs to

                if ($_POST["var"] == $price)

                {

                    echo ' selected="selected"';

                }

            

            echo '>'. $option .'</option>'. "\n";

        }



echo '

</SELECT>

<br>

</td>

</tr>

<tr>

<td>

<br>Hard Drives:

<br>

<SELECT name="var2" class="body-text-bold-mid">

<OPTION value="0">Please choose one</option>';



foreach ($options as $option => $price)

{

    echo '<option value="'. $price .'"';

            

        if ($_POST["var2"] == $price)

        {

            echo ' selected="selected"';

        }

            

    echo '>'. $option .'</option>'. "\n";

}



echo '

</SELECT>

<br>

</td>

</tr>

<tr>

<td>

<input type=submit value="Update Price"></input>

</form>

</td>

</tr>

</table>

';

$var = $_POST['var'];

$var2 = $_POST['var2'];

$total = $var + $var2;

echo "Total:<b> ";

echo "$$total";

echo "</b> ";

?>

Should go in the PHP section though!

Web-Frenzy · #4 (**permalink**) 02-17-06, 08:58 AM

im a newbie at php, i can understand a little bit of what you added but can you explain it a littler better? by the way it works perfectly, thank you very much.

Nico · #5 (**permalink**) 02-17-06, 09:10 AM

Well the submitted option needs a "selected="selected"", so that it shows up next time. This can't be done in HTML only. This is why a added an array with all the values of the "select" and added the loop. The loop goes through all elements in the array, and echoes an <option> for each, and checks each if the submitted value is the same as the current value. If so than does it add the "selected". I don't know if there's another way to do that, but I always do it like that. I hope you understand.

Web-Frenzy · #6 (**permalink**) 02-17-06, 09:12 AM

yes i understand now, thanks for your time

Christian · #7 (**permalink**) 02-17-06, 12:32 PM

## Thread Moved to the Correct Forum ##