Change output of DateTime in json_encode

Question

Is somehow possible to change output of json_encode([\'date\' => $dateTimeObj])?

Now it prints

{
    \"date\": {
        \"date\":          


        

Answer 1

After changing a few details, notably the interface name, your code works just fine for me on PHP 7.0.14.

<?php

class MyDateTime extends \DateTime implements \JsonSerializable
{
    public function jsonSerialize()
    {
       return $this->format("c");
    }
}

$datetime = new MyDatetime();

$output = [
    'date' => $datetime,
];

echo json_encode($output);
// Outputs: {"date":"2017-02-12T17:34:36+00:00"}