Slim v3 PUT method and retrieve POST data - post

Question

I have added route to update emails in a database which uses PUT method
$app->put('/notifications/{email}', 'add_email_address');
and function for it looks like:
function add_email_address($request, $response, $args) {
$email = $args['email'];
$addon_email = $request->getParam('addon_email', null);
echo "ADD/UPDATE $email with $addon_email";
}
UPDATE somehow on testing PUT method with a form input post addon_email = test#null.com retrieved value for $addon_email is empty;
Any tips what I'm doing wrong?

Answer 1

You should use $request->getParams() to get array of all POST/PUT parameters, or you can use $reqeuest->getParam('key', 'defaultValue'), where 'key' is paramter name and 'defaultValue' is... well, default value in case parameter is missing.
So,
function add_email_address($request, $response, $args) {
$email = $args['email'];
$addon_email = $app->request->getParam('addon_email', null);
// some code....
return $response->withJson("ADD/UPDATE $email with $email");
}
EDIT
We both forgot that you should return response object. )
Since add_email_address is route callback, it should return Psr\Http\Message\ResponseInterface response.

Answer 2

I have got it to work by changing
$addon_email = $app->request->getParam('addon_email', null);
to
$allPostPutVars = $request->getParsedBody();
$addon_email = $allPostPutVars['addon_email'];
It looks like getParam works only for GET method. Also content-type must be set as x-www-form-urlencoded