PHP CORS

index.php

 public function __construct()
    {
        parent::__construct();

        //CORS don't remove
        header('Access-Control-Allow-Origin: *');
        header("Access-Control-Allow-Headers: X-API-KEY, Origin, X-Requested-With, Content-Type, Accept, Access-Control-Request-Method");
        header("Access-Control-Allow-Methods: GET, POST, OPTIONS, PUT, DELETE");
        $method = $_SERVER['REQUEST_METHOD'];
        if($method == "OPTIONS") {
            die();
        }
    }