Support http and https concurrently in wp-config

M&D wp-config.php

# Support http and https concurrently
function isSecure() {
  return
    (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off')
    || $_SERVER['SERVER_PORT'] == 443;
}

$web_site     = $_SERVER['HTTP_HOST'];
$schema       = isSecure() ? 'https://' : 'http://';
$web_site_url = $schema . $web_site;

define('WP_HOME',    $web_site_url);
define('WP_SITEURL', $web_site_url);