como recorrer un array tipo stdClass Object por indicies??

<?php

    $array = ['{"a":1}', '{"c":2}', '{"d":3}', '{"e":4}'];

    foreach ($array as &$json) {
        $vector_data = std_class_object_to_array(json_decode($json));

        foreach($vector_data as $key=>$value) {
            echo "Propiedad ".$key."  => ".$value."<br>";
        }

    }

    function std_class_object_to_array($stdclassobject) {
        $_array = is_object($stdclassobject) ? get_object_vars($stdclassobject) : $stdclassobject;
        foreach ($_array as $key => $value) {
                $value = (is_array($value) || is_object($value)) ? std_class_object_to_array($value) : $value;
                $array[$key] = $value;
        }
        return $array;
    }

?>