CORS for PHP (using the PSR-7 HTTP message interfaces)

Library and middleware enabling cross-origin resource sharing. It attempts to implement the W3C Recommendation for cross-origin resource sharing.

Note: This is a standalone fork of https://github.com/asm89/stack-cors fork of https://github.com/fruitcake/php-cors and is compatible almost compatible with the options for CorsService.
You need to pass an instance of a PSR-17 HTTP message factory as the first argument. It is used to generate the CORS responses.

Installation

Require fruitcake/php-cors using composer, add this repository as a git source and choose the dev-feature/psr-7-rewrite version.

Usage

This package can be used as a library. You can use it in your framework using:

• Stack middleware: https://github.com/asm89/stack-cors
• Laravel: https://github.com/fruitcake/laravel-cors

Options

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.	[]
maxAge	Sets the Access-Control-Max-Age response header.	0
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. A wildcard in allowedOrigins will be converted to a pattern.

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

Note: Allowing a single static origin will improve cacheability.

Example: using the library

<?php

use Fruitcake\Cors\CorsService;

$cors = new CorsService(
  new PSR17Factory(),
  [
    'allowedHeaders'         => ['x-allowed-header', 'x-other-allowed-header'],
    'allowedMethods'         => ['DELETE', 'GET', 'POST', 'PUT'],
    'allowedOrigins'         => ['http://localhost', 'https://*.example.com'],
    'allowedOriginsPatterns' => ['/localhost:\d/'],
    'exposedHeaders'         => ['Content-Encoding'],
    'maxAge'                 => 0,
    'supportsCredentials'    => false,
  ]
);

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

License

Released under the MIT License, see LICENSE.

This package is split-off from https://github.com/asm89/stack-cors and developed as stand-alone library since 2022