Stripe bank account id

Question

So I have spent the last two days looking around on stackoverflow and also the stripe API and I can't seem to find out how to get the banking ID when I add a new bank account for a worker. The account gets added to stripe, but it never seems to return me a bank id token, the ba_****.

Here is my code to add the bank account:

First method I tried:

 $bank_account_token = mysqli_real_escape_string($link, $_POST['token']);

 $account = \Stripe\Account::retrieve($worker_token);
$account->external_accounts->create(["external_account" => 
$bank_account_token]);
$bank_id = $account->external_account->id;

This is the second method I tried:

$account = \Stripe\Account::retrieve($worker_token);
  $account->external_accounts->create(array(
    "external_account" => array(
    "object" => "bank_account",
    "account_number" => $account_number,
    "routing_number" => $routing_number,
    "country" => "US",
    "currency" => "USD",)
  ));
$bank_id = $account->external_account->id;

I have also tried these various other methods to try and capture the bank id after it has been input into stripe and none of them return an id.

$bank_id = $account->bank_account->id;
$bank_id = $account->bank_account->external_account->id;
$bank_id = $account->external_accounts->bank_account->id;

This is the response that stripe says I should get when I add a new bank account:

com.stripe.model.BankAccount JSON: {
"id": "ba_1DVFGuC7941OKJKEoBwDlmHc",
"object": "bank_account",
"account_holder_name": null,
"account_holder_type": null,
"bank_name": "STRIPE TEST BANK",
"country": "US",
"currency": "usd",
"fingerprint": "bGA06pJMr6Vwreh6",
"last4": "6789",
"metadata": {
},
"routing_number": "110000000",
"status": "new",
"account": "acct_1BS4bBC7941OKJKE"
}

Answer 1

Okay so after further digging and reaching out to stripe (waiting on their email replies) I have figured out that their documentation is outdated in some sections. The correct response is:

 "external_accounts": {
"object": "list",
"data": [
  {
    "id": "ba_1DVFGuC7941OKJKEoBwDlmHc",
    "object": "bank_account",
    "account": "acct_2BS4cCb7841ONDLK",
    "account_holder_name": null,
    "account_holder_type": null,
    "bank_name": "STRIPE TEST BANK",
    "country": "US",
    "currency": "usd",
    "default_for_currency": true,
    "fingerprint": "bGA06pJMr6Vwreh6",
    "last4": "6789",
    "metadata": {
    },
    "routing_number": "110000000",
    "status": "new"
  }
],

So to pull the first element (which is the id) I needed to pull it for an array:

  $account = \Stripe\Account::retrieve($worker_token);
  $account->external_accounts->create(["external_account" => $bank_account_token]);
  $bank_id = $account->external_accounts->data[0]->id;