使用PHP从HTTP重定向到HTTPS

尝试这样的事情（应该适用于Apache和IIS）：

if (empty($_SERVER['HTTPS']) || $_SERVER['HTTPS'] === "off") {    $location = 'https://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];    header('HTTP/1.1 301 Moved Permanently');    header('Location: ' . $location);    exit;}