javascript - 判断当前环境和请求来源——需要定义变量

Question

除了最后一个变量 $currentEnv = '???' 外，我几乎所有的代码都已完成.如何使用此语法检测当前环境？？

/**
     * CORS Implementation to support AJAX requests from mobile site
     * @see http://en.wikipedia.org/wiki/Cross-origin_resource_sharing
     */
    // Define allowed origins per environment
    $allowedOrigins = array(
        'prod' = array(
            'http://m.site.com'
          , 'https://m.site.com'
        )
      , 'staging' = array(
            'http://stg-m.site.com'
          , 'https://stg-m.site.com'
        )
      , 'qa' = array(
            'http://qa-m.site.com'
          , 'https://qa-m.site.com'
        )
    );

    // Determine the current environment and requesting origin
    $httpOrigin = $_SERVER['HTTP_ORIGIN'];
    $currentEnv = "prod"; **// Something that determines the environment...**

    // Allow only if all points match
    if ( isset($allowedOrigins[$currentEnv])
      && in_array($httpOrigin, $allowedOrigins[$currentEnv])
    ){
      header("Access-Control-Allow-Origin: $httpOrigin");
      header("Access-Control-Allow-Methods: POST, GET");
    }

Answer 1

总的来说应该是更好的方法，但问题是:

$httpOrigin = $_SERVER['HTTP_ORIGIN'];

foreach($allowedOrigins as $env => $url) {
    if(in_array($httpOrigin, $url)) {
        $currentEnv = $env;
        break;
    }
}