Identifying dynamic form fields

tpclarke2 · July 20, 2007

Here's the situation:

User goes to page which is a form that asks for some basic info regarding returning products for credit/exchange, and also asks for how many products are going to be returned. Upon submitting, a return authorization form is presented to them with the specified number of product fields. I now want to take the input from this form and email it to myself, as well as, display a confirmation page to the user. The problem I have is a can't say, for instance, echo "$field_name"; because field_name will get created dynamically after the user specifies how many products to return. For example, say the user says 5 products, this will generate a form with field names like:

return_code0 inv_num0 qty0 product0 cre_exch0 stockout0

return_code1 inv_num1 qty1 product1 cre_exch1 stockout1

return_code2 inv_num2 qty2 product2 cre_exch2 stockout2 and so on....

These get created with a for() loop. Once this form is submitted, how can I address the field names?

Here's my code so far, any help would be greatly appreciated!

if (!$num_prods){

<td align='right' nowrap>Salon Name: </td>

<tr><td align='right' nowrap>Contact: </td>

<td align='right' nowrap>Order Date (mm-dd-yy): </td>

<tr><td align='right' nowrap>Order #: </td>

<td align='right' nowrap>Account #: </td>

<tr><td align='right' nowrap>Number of Products: </td>

</table></div>";

exit;

}

if ($num_prods >= '1' && !$complete){

<tr>

<td nowrap align='center'>Return Code</td><td nowrap align='center'>Invoice #</td>

<td nowrap align='center'>Qty</td><td nowrap align='center'>Product Description (include size)</td>

<td nowrap align='center'>Credit/Exchange</td><td nowrap align='center'>Stockout?</td></tr>";

for ($i = 0; $i < $num_prods; $i++){

echo "<tr>

<option value=''>Select...</option>

<option value='1'>Shipping Error</option>

<option value='2'>DSC Error</option>

<option value='3'>CSR Error</option>

<option value='4'>Customer Return</option>

<option value='5'>Overstock</option>

<option value='6'>Damaged</option></select></td>

<option value=''>Select...</option>

<option value='C'>Credit</option>

<option value='E'>Exchange</option></select></td>

<option value=''>Select...</option>

<option value='N'>No</option></select></td></tr>";

}

echo "</table><br/><input type='submit' name='submit' value='submit'></form>";

do_html_footer();

exit;

}

if ($num_prods && $complete){

$recipient = "[email protected]";

$subject = "RA Form for order add-on";

$mailheaders = "From: $rep\n";

$msg = "--------------------------------------------------------------------\n";

$msg .= "$rep needs to add credits/exchanges to an existing order. Here's the info:\n";

$msg .= "-------------------------------------------------------------------\n";

$msg .= "Order #: $ord_num\n";

$msg .= "Account: $acct_num\n";

$msg .= "Salon: $sname\n";

$msg .= "Contact: $contact\n";

$msg .= "Date: $date\n";

$msg .= "-------------------------------------------------------------------\n";

for ($i = 0; $i < $num_prods; $i++){

HERE'S WHERE THE CODE WOULD GO THAT LOOPS THROUGH THE SUBMITTED FORM AND EMAILS ME THE VALUES

}

$mailheaders .= "Reply-To: [email protected]\n\n";

mail($recipient, $subject, $msg, $mailheaders);

echo "<div align = 'center'>Your RA Form has been submitted. Here's your copy:<p>

<tr><td align='center' nowrap>Reason</td>

<td align='center' nowrap>Invoice #</td>

<td align='center' nowrap>Product</td>

<td align='center' nowrap>Stockout?</td></tr>";

for ($i = 0; $i < $num_prods; $i++){

HERE IS WHERE THE CODE WOULD GO TO LOOP THE SUBMITTED FORM AND DISPLAY A CONF PAGE FOR THE USER

}

echo "</table></p></div>";

do_html_footer();

exit;

}

?>

ss32 · July 21, 2007

make a hidden field that tells you how many fields that there were, and then loop through them using the $_POST['return_code' + $i] sort of thing. its not that hard, if i understand your code directly.

<?php
for ($i = 0; $i <= $_POST['num_of_fields']; $i++) {
  msg .= "return code:  " . $_POST['return_code' . $i] . "\r\n";
  //and the rest...
}
?>

tpclarke2 · July 22, 2007

Thank you very much! That worked perfectly. I knew I needed to concatenate a hard coded field name with the variable $i somewhere, just couldn't figure out how to do it. Thanks again.

Barand · July 22, 2007

Pass the fields as arrays by appending [] to the field names

<?php
/**
* PROCESS THE FORM DATA
*/
if (isset($_POST['sub']))
{
    foreach ($_POST['return_code'] as $k=>$return_code)
    {
        $inv_num = $_POST['inv_num'][$k];         // get other fields for same input set
        $qty = $_POST['qty'][$k];
        $product = $_POST['product'][$k];
        $cre_exch = $_POST['cre_exch'][$k];
        $stockout = $_POST['stockout'][$k];
        
        // process this input record
        echo "$return_code,  $inv_num, $qty, $product, $cre_exch, $stockout <br />"; 
    }
}
/**
* THE FORM
*/
$howMany = 5;   // requested by user

echo '<form method="post">';

echo '<table>';
echo '<tr>
    <th>Return code</th>
    <th>Inv num</th>
    <th>Qty</th>
    <th>Product</th>
    <th>CRE exch</th>
    <th>Stockout</th>
    </tr>';
        
for ($i=0; $i<$howMany; $i++)
{
    echo '<tr>
        <th><input type="text" name="return_code[]" size="5"></th> 
        <th><input type="text" name="inv_num[]" size="5"></th>
        <th><input type="text" name="qty[]" size="5"></th>
        <th><input type="text" name="product[]" size="5"></th>
        <th><input type="text" name="cre_exch[]" size="5"></th>
        <th><input type="text" name="stockout[]" size="5"></th>
        </tr>';
}
echo '</table>';
echo '<input type="submit" name="sub" value="Submit">';
echo '</form>'
?>

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Identifying dynamic form fields

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