Solve CORS Origin :: My case in vue.js 2 with axios and rest api codeigniter 3.1.11

index.php

<?php
// please place this script to index.php in root folder
// in first line after open tag php

header('Access-Control-Allow-Origin: *');
header("Access-Control-Allow-Methods:  GET, POST, PUT, PATCH, DELETE, OPTIONS");
header("Access-Control-Allow-Headers: X-API-KEY, Origin, X-Requested-With, Content-Type, Accept, Access-Control-Request-Method,Access-Control-Request-Headers, Authorization");
if ($_SERVER['REQUEST_METHOD'] == "OPTIONS") {
	header("HTTP/1.1 200 OK");
	die();
}