/**
 * @var PDO
 */

$array = [
    45 => [
        'curl_options' => [
            CURLOPT_URL => 'http:',
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_POST => true,
        ],
        'curl_postfield' => 'id',
        'status_pattern' => '/[da-z]{13}s*(.+)/isu'
    ],
    46 => [
        'curl_options' => [
            CURLOPT_URL => 'http:',
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_POST => true,
        ],
        'curl_postfield' => 'post',
        'status_pattern' => '/[da-z]{10}s*(.+)/isu'
    ]
];

$array = [];
/** @var $array ExampleClass[] */

foreach ($array as $object) {
    // $object->getS... сработает автодополнение
    $object->getSomething();
}

class ExampleClass
{
    /** @var ExampleEmbeddedClass[] */
    public $list = [];

    public function getSomething() {}
}

class ExampleEmbeddedClass
{
    public $property = 1;
}

$array = [
    42 => new ExampleClass(),
];
/** @var $array ExampleClass[] */
$array[42]->list[] = new ExampleEmbeddedClass();

$cleanArray = json_decode(json_encode($array), true);

var_export($cleanArray);

array (
  42 =>
  array (
    'list' =>
    array (
      0 =>
      array (
        'property' => 1,
      ),
    ),
  ),
)