I can't send POST request from android volley to php

I'm using android volley StringRequest to send a post request to a PHP file which is already hosted online. This was working before but after the domain name was changed, this PHP file no longer receives the volley request as a post request. In the PHP file $_SERVER['REQUEST_METHOD'] returns GET instead of POST.

Here is the android volley request code snippet

StringRequest request = new StringRequest(Request.Method.POST, postURL, new Response.Listener<String>(){ @Override public void onResponse(String s) { Log.d("MY_DEBUG",s); } },new Response.ErrorListener(){ @Override public void onErrorResponse(VolleyError volleyError) { } }) { @Override public Map<String, String> getHeaders() { Map<String, String> parameters = new HashMap<>(); parameters.put("Connection", "Keep-Alive"); return parameters; } @Override public String getBodyContentType() { //return "application/x-www-form-urlencoded; charset=UTF-8"; return "application/x-www-form-urlencoded"; } //adding parameters to send @Override protected Map<String, String> getParams() { Map<String, String> parameters = new HashMap<>(); parameters.put("request", "edit_product"); parameters.put("id", id); return parameters; } }; request.setShouldCache(false); InitiateVolley.getInstance().addToRequestQueue(request); 

And here are the few first lines of code in the PHP file that handles the post request from an android volley

if($_SERVER['REQUEST_METHOD']=='POST'){ //it's a POST request, We are good to go...handle the post request. }else{ //not a POST request, kill it here echo "error"; die(); } 

What could be causing this issue? Is there a setting I have to do on the PHP side? Or maybe the PHP version of the new domain? Please help out