Can't create a Folder using BOX API v2.0 - box-api

Question

function post($url, $params, $headers) {
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
$data = curl_exec($ch);
curl_close($ch);
return $data;
}
$parent_id = 0;
$name = 'examplefolder';
$params = array('name' => $name => json_encode(array('id' => $parent_id)));
$resp = post('https://api.box.com/2.0/folders', $params, array('Authorization: Bearer ' . $ACCESS_TOKEN_HERE));
When this code executes I got this error in Json format
{"type":"error","status":400,"code":"bad_request","context_info":{"errors":[{"reason":"missing_parameter","name":"parent","message":"'parent' is required"},{"reason":"missing_parameter","name":"name","message":"'name' is required"}]},"help_url":"http:\/\/developers.box.com\/docs\/#errors","message":"Bad Request","request_id":"204107642652b93aceca050"}
Is there anything I'm missing?
Additional note.
I even tried to make the params a query string like this.
name=examplefolder&parent={"id":0}
and this gives me a different error
{"type":"error","status":400,"code":"bad_request","context_info":{"errors":[{"reason":"invalid_parameter","name":"entity-body","message":"Invalid value 'name=examplefolder&parent={\"id\":0}'. Entity body should be a correctly nested resource attribute name\/value pair"}]},"help_url":"http:\/\/developers.box.com\/docs\/#errors","message":"Bad Request","request_id":"154368831052b93bb027779"}

Answer 1

I'm not totally familiar with this language syntax, but it looks to me like the parent object is not declared in your POST body. You need to be sending this:
{"name":NAME, "parent":{"id":"0"}}
You might be able to accomplish that by changing your $params like so:
$params = array('name' => $name, 'parent' => json_encode(array('id' => $parent_id)));
Also, per the documentation the $parent_id should be serialized as a string, not as an integer.

Answer 2

{"name":NAME, "parent":{"parent_id":"0"}}
This worked for me when I was working Angular 1 - angular file upload module.
However it is different with angular2, still working on..
vm.uploader.onBeforeUploadItem = function (item) {
if (!vm.parentFolderId || item.isVersionUpload) return;
item.headers = { Authorization: 'Bearer ' + vm.userToken };
item.formData = {
name: item.file.name,
parent: {
parent_id: vm.parentFolderId
}
};
}