Creating multidimensional array PHP - php

Question

I'm attempting to create a multidimensional array which should have the ID and quantity from the $_POST array. At the moment it seems to put every quantity into each an element with each ID.However I want it to take the first elements from each array and then add them together to a new array and so on.
Whereas it should be
ID 1 - Quantity 100
ID 2 - Quantity 50
etc
But at the moment I get this
array(16) {
[0]=>
array(2) {
["id"]=>
string(1) "1"
["quantity"]=>
string(2) "50"
}
[1]=>
array(2) {
["id"]=>
string(1) "1"
["quantity"]=>
string(3) "100"
}
[2]=>
array(2) {
["id"]=>
string(1) "1"
["quantity"]=>
string(3) "100"
}
[3]=>
array(2) {
["id"]=>
string(1) "1"
["quantity"]=>
string(3) "100"
}
[4]=>
array(2) {
["id"]=>
string(2) "12"
["quantity"]=>
string(2) "50"
}
[5]=>
array(2) {
["id"]=>
string(2) "12"
["quantity"]=>
string(3) "100"
}
[6]=>
array(2) {
["id"]=>
string(2) "12"
["quantity"]=>
string(3) "100"
}
[7]=>
array(2) {
["id"]=>
string(2) "12"
["quantity"]=>
string(3) "100"
}
[8]=>
array(2) {
["id"]=>
string(1) "2"
["quantity"]=>
string(2) "50"
}
[9]=>
array(2) {
["id"]=>
string(1) "2"
["quantity"]=>
string(3) "100"
}
[10]=>
array(2) {
["id"]=>
string(1) "2"
["quantity"]=>
string(3) "100"
}
[11]=>
array(2) {
["id"]=>
string(1) "2"
["quantity"]=>
string(3) "100"
}
[12]=>
array(2) {
["id"]=>
string(1) "6"
["quantity"]=>
string(2) "50"
}
[13]=>
array(2) {
["id"]=>
string(1) "6"
["quantity"]=>
string(3) "100"
}
[14]=>
array(2) {
["id"]=>
string(1) "6"
["quantity"]=>
string(3) "100"
}
[15]=>
array(2) {
["id"]=>
string(1) "6"
["quantity"]=>
string(3) "100"
}
}
Here is my PHP code.
foreach($_POST['sweetids'] as $id) {
foreach($_POST['quantites'] as $quantity) {
$stock_array[] = array(
"id"=> $id,
"quantity" => $quantity
);
}
}

Answer 1

I think this is what you're trying to achieve:
foreach($_POST['sweetids'] as $key=>$id) {
$stock_array[] = array(
"id"=> $id,
"quantity" => $_POST['quantities'][$key]
);
}

Answer 2

You're iterating $_POST['quantities'] for every $_POST['sweetids'] which is probably not what you intend. When you iterate both, your result will be every combination of sweetids and quantities, not each pair of them.
I'm guessing you meant something more like:
// Assuming you already verified that $_POST['quantities'] and $_POST['sweetids'] exist
// and that both of them have the same number of elements
for ( $i = 0, $len = count($_POST['sweetids']); $i < $len; $i++ ) {
$stock_array[] = array(
'id' => $_POST['sweetids'][$i],
'quantity' => $_POST['quantities'][$i]
);
}