str_getcsv won't work correctly in some special cases

Description

The function should not rebuild the string-annotation in the CSV-String by using the commas, if str_getcsv is used in the first step of the small algorithm.
The following code is motivated by the example of durik at 3ilab dot net : He mentioned: "...
Why not use explode() instead of str_getcsv() to parse rows? Because explode() would not treat possible enclosured parts of string or escaped characters correctly."

<?php

$string =<<<DOMTEST
"PHP, Java","Python"
"PHP2, Java2","Python"
"PHP3, Java3","Python"
DOMTEST;

  $data = str_getcsv($string, "\n" );
        foreach ($data as &$row) {
            $row = str_getcsv($row, ',');
        }
var_dump($data);

Resulted in this output:

array(3) {
  [0]=>
  array(3) {
    [0]=>
    string(3) "PHP"
    [1]=>
    string(5) " Java"
    [2]=>
    string(6) "Python"
  }
  [1]=>
  array(3) {
    [0]=>
    string(4) "PHP2"
    [1]=>
    string(6) " Java2"
    [2]=>
    string(6) "Python"
  }
  [2]=>
  &array(3) {
    [0]=>
    string(4) "PHP3"
    [1]=>
    string(6) " Java3"
    [2]=>
    string(6) "Python"
  }
}

But I expected this output instead:

array(3) {
  [0]=>
  array(2) {
    [0]=>
    string(8) "PHP, Java"
    [1]=>
    string(6) "Python"
  }
  [1]=>
  array(2) {
    [0]=>
    string(10) "PHP2, Java2"
    [1]=>
    string(6) "Python"
  }
  [2]=>
  &array(2) {
    [0]=>
    string(10) "PHP3, Java3"
    [1]=>
    string(6) "Python"
  }
}

PHP Version

8.2.1

Operating System

No response

まず、改行およびカンマの区切り文字を使って str_getcsv で提供された PHP の例を再現し、次に、引用符で囲まれたカンマとエスケープされた文字に対する関数の既存の動作を調べます。Issue では実装ファイルもテストも指定されていません。意図した入れ子のパース動作が確立され、リグレッションテストでカバーされれば完了です。