让PHP build-in web server支持跨域： php -S locahost:4000 route.php

route.php

<?php

if (file_exists($_SERVER["SCRIPT_FILENAME"]))  
{
	header('Access-Control-Allow-Origin: *');
	header('Access-Control-Allow-Headers: origin,x-requested-with,content-type');
	header('Access-Control-Allow-Methods: PUT,GET,POST,DELETE,OPTIONS');

	readfile($_SERVER["SCRIPT_FILENAME"]);
	
	
	
}