Description:
------------
When converting SimpleXMLElement to array and nested element has XML attributes and its content contains only text, output array does not include '@attributes' key.

This bug has been already fixed in PHP versions 7.3.17 and 7.4.5 (Bug #61597), but appeared again.

Test script:
---------------
$str = <<<'EOX'
<?xml version="1.0" encoding="UTF-8"?>
<test>
    <person>
        <name>Pepa</name>
        <surname>Novak</surname>
        <emails>
            <email type="private">pepa@gmail.com</email>
            <email type="work">pepa.novak@cmp.com</email>
            <email type="work">novak@company.com</email>
        </emails>
    </person>
</test>
EOX;

$xml = simplexml_load_string($str);
var_dump(json_decode(json_encode($xml), true));

Expected result:
----------------
array(1) {
  ["person"]=>
  array(3) {
    ["name"]=>
    string(4) "Pepa"
    ["surname"]=>
    string(5) "Novak"
    ["emails"]=>
    array(1) {
      ["email"]=>
      array(3) {
        [0]=>
        array(2) {
          ["@attributes"]=>
          array(1) {
            ["type"]=>
            string(7) "private"
          }
          [0]=>
          string(14) "pepa@gmail.com"
        }
        [1]=>
        array(2) {
          ["@attributes"]=>
          array(1) {
            ["type"]=>
            string(4) "work"
          }
          [0]=>
          string(18) "pepa.novak@cmp.com"
        }
        [2]=>
        array(2) {
          ["@attributes"]=>
          array(1) {
            ["type"]=>
            string(4) "work"
          }
          [0]=>
          string(16) "novak@company.cz"
        }
      }
    }
  }
}

Actual result:
--------------
array(1) {
  ["person"]=>
  array(3) {
    ["name"]=>
    string(4) "Pepa"
    ["surname"]=>
    string(5) "Novak"
    ["emails"]=>
    array(1) {
      ["email"]=>
      array(3) {
        [0]=>
        string(14) "pepa@gmail.com"
        [1]=>
        string(18) "pepa.novak@cmp.com"
        [2]=>
        string(16) "novak@company.cz"
      }
    }
  }
}