json_encode implementation with callback, like JSON.stringify of the Javascript

json_encode_callback.php

<?php

/**
 * @author Wallace Maxters <[email protected]>
 * Encodes json after apply callback in data passed
 * 
 * @param mixed $data
 * @param callable $callback
 * @param int $options
 * @return string
 */
function json_encode_callback($data, callable $callback, $options = 0)
{
    $isIterable = static function ($data) {

        return is_array($data) || $data instanceof \stdClass || $data instanceof Iterator;
    };
    
    $recursiveCallbackApply = static function ($data, callable $callback) use(&$recursiveCallbackApply, $isIterable) {

        if (! $isIterable($data))
        {
            return $callback($data);
        }
        
        foreach ($data as $key => &$value) {

            if ($isIterable($value)) {
                $value = $recursiveCallbackApply($value, $callback);
                continue;
            }

            $value = $callback($value, $key);
        }

        return $data;
    };

    return json_encode($recursiveCallbackApply($data, $callback), $options);
}

Tests:

$obj = new stdClass;

$obj->date = new DateTime;

$obj->name = "Wallace";

$result = json_encode_callback($obj, function ($value) {
    return $value instanceof \DateTime ? $value->format('c') : $value;
});

var_dump($result);

the result is:

string(53) "{"date":"2018-08-09T17:41:27-03:00","name":"Wallace"}"