How to get Expiry date from the SSL Certificate file in PHP

Question

I want to get the expiry date from the SSL Certificate file. There is a web page in PHP that I've created, in which user can upload his SSL Certificate file and I will have to get the expiry date of that file using PHP.

Answer 1

This worked for me:

$url = "https://www.google.com";
$orignal_parse = parse_url($url, PHP_URL_HOST);
$get = stream_context_create(array("ssl" => array("capture_peer_cert" => TRUE)));
$read = stream_socket_client("ssl://".$orignal_parse.":443", $errno, $errstr, 
30, STREAM_CLIENT_CONNECT, $get);
$cert = stream_context_get_params($read);
$certinfo = openssl_x509_parse($cert['options']['ssl']['peer_certificate']);

echo '<pre>';
print_r($certinfo);
echo '</pre>';

fine ssl expire time in this fild

[validTo_time_t] => 1523164135 // expire time.

Convert Date & Time

$valid_from = date(DATE_RFC2822,$certinfo['validFrom_time_t']);
$valid_to = date(DATE_RFC2822,$certinfo['validTo_time_t']);
echo "Valid From: ".$valid_from."<br>";
echo "Valid To:".$valid_to."<br>";

Result:

Valid From: Mon, 09 Oct 2017 07:00:00 +0700 Valid To: Wed, 10 Oct 2018 06:59:59 +0700