PHP json_encode - JSON_FORCE_OBJECT mixed object and array output

Question

I have a PHP data structure I want to JSON encode. It can contain a number of empty arrays, some of which need to be encoded as arrays and some of which need to be encoded a

Answer 1

Same answer, for php7+ and php 5.4.

$foo = [
  "bar1" => (object)["",""],
  "bar2" => ["",""]
];

echo json_encode($foo);