$_POST superglobal in foreach loop not working - php

Question

With below code I select a quantity, then I check the Item whose quantity I have selected then I click the add button to submit the form.
<form name="addtocart" method="post" action="checkbox.php">
//foreach loop below loops through array of items fetched from the db
<?php foreach($result2 as $row) { ?>
<select name="qty">
<?php for ($i=0; $i < $row['prd_quantity'] + 1 ; $i++) { ?>
<option value = "<?php echo $i; ?>" ><?php echo $i; ?></option>;
<?php }?>
</select>
<input type="checkbox" name="checkitem[]" id="addtocart" value="<?php echo $row['prd_id'] ?>" optional /></p>
<?php } ?>
enter code here
<input type="submit" value="Make Order"/>
</form>
After selecting, say 8 on the select element, $ordqty below still outputs 0. I am thinking its something to do with the loop and $_POST superglobal but
checkitems[ ]
works. Help would be appreciated. Thanks.
$ordqty = $_POST['qty'];
//$ordqty returns 0.
Below is the HTML Generated for the first item whose $row['prd_quantity'] = 8 :
<select name = "qty">
<option value="0">0</option>
;
<option value="1">1</option>
;
<option value="2">2</option>
;
<option value="3">3</option>
;
<option value="4">4</option>
;
<option value="5">5</option>
;
<option value="6">6</option>
;
<option value="7">7</option>
;
<option value="8">8</option>
;
</select>

Answer 1

Seems to me like if there's more than a single row returned by your DB then there will be multiple select elements within your response, all named qty. This could explain why the form isn't posting the correct value. Have you checked that?
Try something along the lines of:
<select name="qty[<?php echo $row['prd_id']; ?>]">
<?php for ($i=0; $i < $row['prd_quantity'] + 1 ; $i++) { ?>
<option value = "<?php echo $i; ?>" ><?php echo $i; ?></option>;
<?php }?>
</select>
This will post an array of selections keyed by product IDs.
Update
Thank you for the idea of indexing the array of selected items' quantities using product IDs worked.
And to access the elements of the qty[ ] array , I know this could be better, but I did:
//Array below holds the values of the quantities entered
$new_ord_qty = $_POST['qty'];
//Array below holds product ids -- in the HTML code -- prodid is the name of a hidden inputfield inside the foreach loop whose value i have set to $row['prd_id']
$prod_id_array = $_POST['prodid'];
for($i=0; $i<count($checked_items_array);$i++) {
for ($i=0; $i < count($new_ord_qty); $i++) {
//Array below holds the values of the quantities entered with the prod_id_array elements as //the indices
$ord_qty = $new_ord_qty[$prod_id_array[$i]];
// Here echo will output an array of the quantities entered for the checked items
echo $ord_qty;
}
}
Thanks folks.

Answer 2

I think the issue might be that you are passing the checkbox as an array checkitems[] but you are passing the quantity as a single qty might be worth changing the name of the quantity select to qty[]
Obviously you may also need to update your code to handle the qty being an array and match it to the checkitem value.

Answer 3

The problem should be that you have multiple selects with the same name, I assume that the POST variable will show the last one, which is still set to 0. You might use an id postfix, like, qty_0, qty_1 for each dropdown list.
Could you post the HTML code the segment generates? That might helpful.