<?php if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) { header('HTTP/1.0 304 Not Modified'); exit; } header('Access-Control-Allow-Origin: *'); header('Last-Modified: ' . gmdate("D, d M Y H:i:s", filemtime("conditional-cors.php")) . " GMT"); header('Content-Type: application/javascript'); echo '2;' ?>