Increase +1 when sending a post?

Question

PHP

Good afternoon.
I made a form , it has input

<input type="text" name="data1[{$num+1}]" value="{$purchase->variant->sku|escape}">

Here name="data1 [{$num+1}] " - +1 is added each time

The form is sent to the send.php file when it is sent.
It has the following construction: Then date1[2] is sent, but it is necessary that
$product[] = $_POST[data1][$num+1];

• date1[1]
  
• date1[2]
  

and so on...
I sent a couple of values ​​and not one. Help me solve this please

Answer 1

foreach ($_POST['data1'] as $value) {
    $product[] = $value;
}