access-control-allow-origin multiple subdomains domains example
Example: header cross origin using php only for our domains and subdomain
$allowedOrigins = [
"http://www.websiteA.com",
"https://www.websiteB.com"
// ... etc
];
if (in_array($_SERVER["HTTP_ORIGIN"], $allowedOrigins)) {
header("Access-Control-Allow-Origin: " . $_SERVER["HTTP_ORIGIN"]);
}