PHP按数值将数组拆分为2个数组

Question

I'm having a hard time figuring out how to implement this so here it is. I have an array

$arr = array("purchase_order_details_id"=>array(
               0=>"POD1",
               1=>"POD1",
               2=>"POD2",
           ),
            "quantity_received"=>array(
               0=>5,
               1=>10,
               2=>20
            )
         );

I want to split the arrays into two. Into something like this.

$pod_2 = array("purchase_order_details_id"=>array(
       0=>"POD1",
       1=>"POD1"
       ),
       "quantity_received"=>array(
       0=>5,
       1=>10
       ));

$pod_1 = array("purchase_order_details_id"=>array(
       2=>"POD2"
       ),
       "quantity_received"=>array(
       2=>20
       ));

Anyone has an idea on how to do this ? Any thoughts is appreciated. Thanks

Answer 1

I use array_intersect to find the POs in a loop of unique POs.
Then I use array_inyersect_key to get the quantity.
This requires only one iteration per unique Purchase_order_detali_id.
Meaning it has a much better performance than looping the full array.

Edit: added extract to create the two variables. But I would rather keep them in the array if I was you.

$pods = array_unique($arr["purchase_order_details_id"]);

Foreach($pods as $pod){
    $PO = array_intersect($arr["purchase_order_details_id"], [$pod]);
    $qt = array_intersect_key($arr["quantity_received"], $PO);
    $new[$pod] = ["purchase_order_details_id" => $PO, "quantity_received" => $qt];
}
Var_dump($new);
extract($new);

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