Retrieving Post Values From Form With Dynamic Element Names

I'm trying to retrieve the post values from a form where the element names are based on values from a recordset. Here is the form: $recordID = $_GET['recordID']; $colour_result =

Solution 1:

Firstly I would change

name="s_<?php echo $colour_row[colour_name]; ?>"

etc to

name="attributes[s_<?php echo $colour_row[colour_name]; ?>]"

And use the following PHP

if( !empty($_POST['attributes']) ) {
    foreach( $_POST['attributes'] as $sKey => $iQty ) {
        var_dump( $sKey );
        var_dump( $iQty );
    }
} else {
    die( 'Just for debuging. attributes-array was empty' );
}

Or even better

use

name="attributes[xxl][color]" eg. name="attributes[xxl][<?php echo $colour_row[colour_name]; ?>]"

And

if( !empty($_POST['attributes']) ) {
    foreach( $_POST['attributes'] as $sSize => $aData ) {
        var_dump( $sSize );
        var_dump( $aData );
    }
}

Solution 2:

Ok i now have it displaying as a list on the second page using the following code :

<td><center><?php if($colour_row['xxl'] !== '') { echo('<input type="text" size="2" name="xxl_' . $colour_row['colour_name'] . '" placeholder="Qty">');
 } else { echo(''); } ?> </center></td>

and then :

<?php 
$product_code=$_POST["product_code"];

foreach($_POST as $key=>$value)
{
  echo "$key=$value";
  echo "<br />";
}
?>

on the second page.

thank you all for your help, your suggestions put me on the right track, much appreciated.

Solution 3:

You put PHP code inside a string, it does not get parsed by PHP that way:

echo '<input name="xs_<?php echo $colour_row[colour_name]; ?>">';

This should probably be concatenated like so:

echo '<input name="xs_' . $colour_row[colour_name] . '">';

The same goes for

echo '<input id="xs_<?php echo $row[colour_name]; ?>">';

Which needs to be converted to:

echo '<input id="xs_' . $row[colour_name] . '">';

Also is it possible that "$row" has to be "$colour_row" in the id attribute of the input field?

There are some other obvious improvements to be made, but those are outside the scope of your question.

---

I was closing my Netbeans and found this still sitting there, I hope it's of use ( not 100% guaranteed to work out-of-the-box ):

The form php would become:

<?php
$recordID = $_GET["recordID"];

// I adjusted the query somewhat.
// The colours tabel is joined with a USING() command
// The recordId is escaped
$colour_result = mysqli_query($con, "
    SELECT colour_variation.*, colours.*
    FROM colour_variation INNER JOIN colours USING(colour_id)
    WHERE product_code = '". mysqli_escape_string($con, $recordID)."'
");

// I'm using an alternative syntax for the while control structure ( I am
// using a colon instead of braces ):
while ($colour_row = mysqli_fetch_array($colour_result)): ?>
    <tr>
        <td valign="middle"><img src="resources/images/colours/<?php echo $colour_row['colour_image']; ?>" width="35" height="35"></td>
        <td width="100"><?php echo $colour_row['colour_name']; ?></td>
        <!-- I'm using an alternative syntax for the if control structures here -->
        <!-- I also left out the else, since it did not print anything -->
        <!-- I used an array for the name notation, to easily read out the data -->
        <td><center><?php if ($colour_row['xs'] !== ''): ?><input type="text" size="2" name="quantity[<?php echo $colour_row['colour_name']; ?>][xs]" placeholder="Qty"><?php endif; ?> </center></td>
        <td><center><?php if ($colour_row['s'] !== ''): ?><input type="text" size="2" name="quantity[<?php echo $colour_row['colour_name']; ?>][s]" placeholder="Qty"><?php endif; ?> </center></td>
        <td><center><?php if ($colour_row['m'] !== ''): ?><input type="text" size="2" name="quantity[<?php echo $colour_row['colour_name']; ?>][m]" placeholder="Qty"><?php endif; ?> </center></td>
        <td><center><?php if ($colour_row['l'] !== ''): ?><input type="text" size="2" name="quantity[<?php echo $colour_row['colour_name']; ?>][l]" placeholder="Qty"><?php endif; ?> </center></td>
        <td><center><?php if ($colour_row['xl'] !== ''): ?><input type="text" size="2" name="quantity[<?php echo $colour_row['colour_name']; ?>][xl]" placeholder="Qty"><?php endif; ?> </center></td>
        <td><center><?php if ($colour_row['xxl'] !== ''): ?><input type="text" size="2" name="quantity[<?php echo $colour_row['colour_name']; ?>][xxl]" placeholder="Qty"><?php endif; ?> </center></td>
        <td><center><?php if ($colour_row['xxxl'] !== ''): ?><input type="text" size="2" name="quantity[<?php echo $colour_row['colour_name']; ?>][xxxl]" placeholder="Qty"><?php endif; ?> </center></td>
        <td><center><?php if ($colour_row['one_size'] !== ''): ?><input type="text" size="2" name="quantity[<?php echo $colour_row['colour_name']; ?>][one_size]" placeholder="Qty"><?php endif; ?> </center></td>
    </tr>
<?php endwhile; ?>
</table>
<input type="hidden" name="product_code" value="<?php echo $colour_row_products['product_code']; ?>" >

The receiving end would be something like this:

<?php

    $iProductCode = $_POST['product_code'];

    foreach($_POST['quantity'] as $sColor => $aColourQuantityData) {
        foreach($aColourQuantityData as $sSize => $iQuantity) {
            echo "Product #$iProductCode, colour $sColor, size $sSize: $iQuantity pieces<br>";
        }
    }

?>