判断链接是否是https访问_h5判断链接不是hppts

function is_https(){
    if ( ! empty($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) !== 'off')
    {
        return TRUE;
    }
    elseif (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https')
    {
        return TRUE;
    }
    elseif ( ! empty($_SERVER['HTTP_FRONT_END_HTTPS']) && strtolower($_SERVER['HTTP_FRONT_END_HTTPS']) !== 'off')
    {
        return TRUE;
    }
    return FALSE;
};