如何检查域是否有SSL证书？ [英] How to check if domain has SSL certificate or not?

问题描述

是否可以获取详细信息，例如域名（例如 www.example.com ）是否已准备好HTTPS？

Is is possible to get the details like if a domain (say www.example.com) is HTTPS ready?

我需要验证一些URL，无论他们是否有SSL证书。我知道，通过使用 $ _ SERVER ['HTTPS'] ，我们可以查看服务器详细信息。但我怎样才能在其他领域实现同样的目标。

I need to validate some URLs, whether they have SSL certificate or not. I know, by using $_SERVER['HTTPS'] we can check our server details. but how can I achieve the same for other domains.

任何帮助都将不胜感激。

Any help would be much appreciated.

推荐答案

最后，我最终得到了以下代码：

Finally, I've ended up with the following my code:

$stream = stream_context_create (array("ssl" => array("capture_peer_cert" => true)));
$read = fopen("https://www.example.com", "rb", false, $stream);
$cont = stream_context_get_params($read);
$var = ($cont["options"]["ssl"]["peer_certificate"]);
$result = (!is_null($var)) ? true : false;

如果为域启用了HTTPS， var_dump（$ var）给出输出，如下所示：

If HTTPS is enabled for a domain, var_dump($var) gives the output as shown:

resource(4) of type (OpenSSL X.509) 

如果它不存在则返回 NULL 。

我查了几个域名。它似乎工作正常。我希望它会帮助别人。

I've checked a few domains. It seems to be working fine. I hope it will help someone.

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