Script to add SSL expiration dates to Google Calendar

sslgoogcal.php

<?php

$url = "https://yourdomain.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']);
$output = $certinfo['validTo_time_t'];

?>BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//hacksw/handcal//NONSGML v1.0//EN

BEGIN:VEVENT
UID:<?=md5($output);?>
DTSTAMP:<?=date("Ymd", $output);?>T<?=date("His", $output);?>Z
DTSTART:<?=date("Ymd", $output);?>T080000Z
DTEND:<?=date("Ymd", $output);?>T160000Z
SUMMARY:SSL Cert - <?=$url;?>
END:VEVENT

END:VCALENDAR