Check CORS

cors.php

<?php
	header('Accept : application/json');
	header('Access-Control-Allow-Origin : *');
	header('Access-Control-Allow-Methods : POST,GET,OPTIONS,PUT,DELETE');
	header('X-Requested-With : XMLHttpRequest');
	header('Access-Control-Allow-Headers : Content-Type,Authorization');
//https://cors-anywhere.herokuapp.com/

if (!empty($_SERVER["REQUEST_METHOD"]) && $_SERVER['REQUEST_METHOD']=='OPTIONS') {
	header("HTTP/1.1 204 NO CONTENT");
	die;
} 

	$arr = $arr = $_REQUEST;
	header("X-Blablabla: " . $_SERVER['REQUEST_METHOD']);
	echo json_encode($arr);

die;