跨域api

if (!function_exists('check_cors_request')) {
    /**
     * 跨域检测
     */
    function check_cors_request()
    {
        if (isset($_SERVER['HTTP_ORIGIN']) && $_SERVER['HTTP_ORIGIN']) {
            $info = parse_url($_SERVER['HTTP_ORIGIN']);
            $domainArr = explode(',', config('fastadmin.cors_request_domain'));
            $domainArr[] = request()->host(true);
            if (in_array("*", $domainArr) || in_array($_SERVER['HTTP_ORIGIN'], $domainArr) || (isset($info['host']) && in_array($info['host'], $domainArr))) {
                header("Access-Control-Allow-Origin: " . $_SERVER['HTTP_ORIGIN']);
            } else {
                header('HTTP/1.1 403 Forbidden');
                exit;
            }

            header('Access-Control-Allow-Credentials: true');
            header('Access-Control-Max-Age: 86400');

            if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') {
                if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_METHOD'])) {
                    header("Access-Control-Allow-Methods: GET, POST, PUT, DELETE, OPTIONS");
                }
                if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS'])) {
                    header("Access-Control-Allow-Headers: {$_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']}");
                }
                exit;
            }
        }
    }
}

php中对跨域api封装的函数!