PHP判断当前网站是HTTPS还是HTTP

//获取当前网站是HTTPS还是HTTP：

$http_type = ((isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on') || (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https')) ? 'https://' :'http://';

// var_dump($http_type);