Combining values from two arrays with same keys

  I have two arrays like this:

  $arr1 = Array ( [1] => aaa [2] => bbb [match] => ccc )

  $arr2 = Array ( [1] => ddd [2] => xxx [match] => kl )

  So I want to combine these two arrays to this array:

  $arr3 = Array ( [1] => aaa-ddd [2] => bbb-xxx [at] => ccc-kl )

  Here is simple solutions for that.

  $arr3 = array();

  foreach ($arr1 as $key => $val1) {

      $val2 = $arr2[$key];

      $arr3[$key] = $val1 . "-" . $val2;

  }

  ********

  If i want same for add multiple values in DATABASE with key and values.

  DO following things:

  $arr3 = array();

  foreach (array_filter($post['qty']) as $key => $val1) {

         $val2 = $post['item_id'][$key];

         $arr3[$key] = $val2;

         $arr4[$key] = $val1;

         $sql = "INSERT INTO TABLE_NAME ( `field1`,`field2`) VALUES ('".$val1."',                 ".$val2."')";

         $this->db->query($sql);

  }