Get rows from a 2d array from one nominated column value to another

I am working on an array and I would like to get all the arrays between two values of an array eg

$fields = array(
 'a' => array(
  'name' => 'username',
  'type' => 'text',
  ),
 'b' => array(
  'name' => 'birthday',
  'type' => 'text',
  ),
 'c' => array(
  'name' => 'address',
  'type' => 'text',
  ),
 'd' => array(
  'name' => 'password',
  'type' => 'text',
  ),
);

So that given username and password I want to get the following

 'b' => array(
  'name' => 'birthday',
  'type' => 'text',
  ),
 'c' => array(
  'name' => 'address',
  'type' => 'text',
  ),

Simply because it comes after the array with the value of username and before the array with value of password.

Simply loop with two condition like below

$start = "username";
$end = "password";
$new = array();
$flag = false;
foreach($fields as $key=>$value){
  if($value["name"] == $start){
    $flag = true;
    continue;
  }
  if($value["name"] == $end){
    break;;
  }
  if($flag){
    $new[$key] = $value;
  }
}
print_r($new);

Live demo : https://eval.in/879235