Skip to content


Switch branches/tags

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?


Failed to load latest commit information.
Latest commit message
Commit time
January 18, 2022 10:12
January 18, 2022 10:06
January 18, 2022 10:06
January 3, 2022 16:44
April 10, 2017 20:19
January 18, 2022 10:12


Library and middleware enabling cross-origin resource sharing for your http-{foundation,kernel} using application. It attempts to implement the W3C Recommendation for cross-origin resource sharing.

Build status: .github/workflows/run-tests.yml


Require asm89/stack-cors using composer.


This package can be used as a library or as stack middleware.


Option Description Default value
allowedMethods Matches the request method. []
allowedOrigins Matches the request origin. []
allowedOriginsPatterns Matches the request origin with preg_match. []
allowedHeaders Sets the Access-Control-Allow-Headers response header. []
exposedHeaders Sets the Access-Control-Expose-Headers response header. false
maxAge Sets the Access-Control-Max-Age response header.
Set to null to omit the header/use browser default.
supportsCredentials Sets the Access-Control-Allow-Credentials header. false

The allowedMethods and allowedHeaders options are case-insensitive.

You don't need to provide both allowedOrigins and allowedOriginsPatterns. If one of the strings passed matches, it is considered a valid origin.

If ['*'] is provided to allowedMethods, allowedOrigins or allowedHeaders all methods / origins / headers are allowed.

If supportsCredentials is true, you must explicitly set allowedHeaders for any headers which are not CORS safelisted.

Example: using the library


use Asm89\Stack\CorsService;

$cors = new CorsService([
    'allowedHeaders'         => ['x-allowed-header', 'x-other-allowed-header'],
    'allowedMethods'         => ['DELETE', 'GET', 'POST', 'PUT'],
    'allowedOrigins'         => ['http://localhost'],
    'allowedOriginsPatterns' => ['/localhost:\d/'],
    'exposedHeaders'         => false,
    'maxAge'                 => 600,
    'supportsCredentials'    => true,

$cors->addActualRequestHeaders(Response $response, $origin);
$cors->handlePreflightRequest(Request $request);
$cors->isActualRequestAllowed(Request $request);
$cors->isCorsRequest(Request $request);
$cors->isPreflightRequest(Request $request);

Example: using the stack middleware


use Asm89\Stack\Cors;

$app = new Cors($app, [
    // you can use ['*'] to allow any headers
    'allowedHeaders'      => ['x-allowed-header', 'x-other-allowed-header'],
    // you can use ['*'] to allow any methods
    'allowedMethods'      => ['DELETE', 'GET', 'POST', 'PUT'],
    // you can use ['*'] to allow requests from any origin
    'allowedOrigins'      => ['localhost'],
    // you can enter regexes that are matched to the origin request header
    'allowedOriginsPatterns' => ['/localhost:\d/'],
    'exposedHeaders'      => false,
    'maxAge'              => 600,
    'supportsCredentials' => false,