POST API Issue - Not functioning - php

Question

Good afternoon,
I'm having trouble with an api POST request - it simply isn't going anywhere, it's not showing on the API log at all - I've got various get requests which work fine but this one just doesn't - I'm unsure what I am doing wrong.
public function broadband_plan(){
$common = array();
$common['main_menu'] = 'Broadband plan';
$cli_or_postcode = isset($_GET["cli_or_postcode"]) ? $_GET["cli_or_postcode"] : "";
$district_id = isset($_GET["district_id"]) ? $_GET["district_id"] : "";
$sub_premises = isset($_GET["sub_premises"]) ? $_GET["sub_premises"] : "";
$premises_name = isset($_GET["premises_name"]) ? $_GET["premises_name"] : "";
$thoroughfare_number = isset($_GET["thoroughfare_number"]) ? $_GET["thoroughfare_number"] : "";
$thoroughfare_name = isset($_GET["thoroughfare_name"]) ? $_GET["thoroughfare_name"] : "";
$locality = isset($_GET["locality"]) ? $_GET["locality"] : "";
$postcode = isset($_GET["postcode"]) ? $_GET["postcode"] : "";
$nad_key = isset($_GET["nad_key"]) ? $_GET["nad_key"] : "";
$post_town = isset($_GET["post_town"]) ? $_GET["post_town"] : "";
$county = isset($_GET["county"]) ? $_GET["county"] : "";
$district_id = isset($_GET["district_id"]) ? $_GET["district_id"] : "";
$request = array();
$request['apiUsername'] = 'XXXXXXX';
$request['apiPassword'] = 'XXXXXXX';
$request['encryption'] = 'SHA-512';
$request['platform'] = 'LIVE';
$request['method'] = 'POST';
$address = '{
"sub_premises": $sub_premises,
"premises_name": $premises_name,
"thoroughfare_number": $thoroughfare_number,
"thoroughfare_name": $thoroughfare_name,
"post_town": $post_town,
"postcode": $postcode,
"district_id": $district_id,
"nad_key": $nad_key
}';
$address = json_encode($address);
$request['url'] = "/broadband/availability" . $address;
$broadband_plan_detail = array();
if (!empty($address)) {
$broadband_plan_detail = $this->get_plan($request);
}
return view('front.broadband_plan',compact('common','broadband_plan_detail'));
}

Answer 1

The $address after $address = json_encode($address); will be an object, it cannot be concatenated as a string in $request['url'] = "/broadband/availability" . $address;
Please check your API URL and ensure you follow their structure, for example if the API URL accept the parameters as GET request, you can pass the parameters likes:
$request['url'] = "/broadband/availability?sub_premises=" . $sub_premises . "&premises_name=" . $premises_name...
Base on your code, the API method is POST, so you might need to prepare the parameters as an array.