Creating multidimensional array 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]=&gt;
  array(2) {
    ["id"]=&gt;
    string(1) "1"
    ["quantity"]=&gt;
    string(2) "50"
  }
  [1]=&gt;
  array(2) {
    ["id"]=&gt;
    string(1) "1"
    ["quantity"]=&gt;
    string(3) "100"
  }
  [2]=&gt;
  array(2) {
    ["id"]=&gt;
    string(1) "1"
    ["quantity"]=&gt;
    string(3) "100"
  }
  [3]=&gt;
  array(2) {
    ["id"]=&gt;
    string(1) "1"
    ["quantity"]=&gt;
    string(3) "100"
  }
  [4]=&gt;
  array(2) {
    ["id"]=&gt;
    string(2) "12"
    ["quantity"]=&gt;
    string(2) "50"
  }
  [5]=&gt;
  array(2) {
    ["id"]=&gt;
    string(2) "12"
    ["quantity"]=&gt;
    string(3) "100"
  }
  [6]=&gt;
  array(2) {
    ["id"]=&gt;
    string(2) "12"
    ["quantity"]=&gt;
    string(3) "100"
  }
  [7]=&gt;
  array(2) {
    ["id"]=&gt;
    string(2) "12"
    ["quantity"]=&gt;
    string(3) "100"
  }
  [8]=&gt;
  array(2) {
    ["id"]=&gt;
    string(1) "2"
    ["quantity"]=&gt;
    string(2) "50"
  }
  [9]=&gt;
  array(2) {
    ["id"]=&gt;
    string(1) "2"
    ["quantity"]=&gt;
    string(3) "100"
  }
  [10]=&gt;
  array(2) {
    ["id"]=&gt;
    string(1) "2"
    ["quantity"]=&gt;
    string(3) "100"
  }
  [11]=&gt;
  array(2) {
    ["id"]=&gt;
    string(1) "2"
    ["quantity"]=&gt;
    string(3) "100"
  }
  [12]=&gt;
  array(2) {
    ["id"]=&gt;
    string(1) "6"
    ["quantity"]=&gt;
    string(2) "50"
  }
  [13]=&gt;
  array(2) {
    ["id"]=&gt;
    string(1) "6"
    ["quantity"]=&gt;
    string(3) "100"
  }
  [14]=&gt;
  array(2) {
    ["id"]=&gt;
    string(1) "6"
    ["quantity"]=&gt;
    string(3) "100"
  }
  [15]=&gt;
  array(2) {
    ["id"]=&gt;
    string(1) "6"
    ["quantity"]=&gt;
    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
        );
}

}

From what I see, your array is working as it should. What are you trying to get? — Chin Leung
– Chin Leung, Commented Feb 19, 2016 at 14:57
You're iterating $_POST['quantities'] multiple times. I doubt that's what you intended. — Mr. Llama
– Mr. Llama, Commented Feb 19, 2016 at 16:23

Chris Lear · Accepted Answer · 2016-02-19 16:19:56Z

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]
        );
}

answered Feb 19, 2016 at 16:19

Chris Lear

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Comments

Mr. Llama · Accepted Answer · 2016-02-19 16:25:46Z

0

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]
    );
}

answered Feb 19, 2016 at 16:25

Mr. Llama

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