Recursive convert object to array

object_to_array.php

<?php
 /* Recursive convert object to array
 * 
 *
 * @param object $variable
 * @return converted array $variable
 */
function object_to_array($d) {
    if (is_object($d))
        $d = get_object_vars($d);
    return is_array($d) ? array_map(__FUNCTION__, $d) : $d;
}
/**
 * Recursive convert array to object
 * 
 *
 * @param array $variable
 * @return converted object $variable
 */
function array_to_object($d) {
    return is_array($d) ? (object) array_map(__FUNCTION__, $d) : $d;
}

$arr = [
    "facebook"=>[
        "ig"=>1,
        "whatapps"=>2
        ],
    "sv"=>"ssss",
    "param" => [
        "color"=>[
            "red"=>1]
        ]
];

$encode = json_encode($arr);
//var_dump($encode);
$decode = json_decode($encode);
//var_dump($decode);
$res = object_to_array($decode);
var_dump($res);