监控页面输入登陆login.php后无法显示页面

Question

页面显示以下字符，缺少了什么，才能显示监控页面
get_one($sql);
if ($row != NULL) {
$login = true;
$user_id = $row["uid"];
if ($row["userport"] != NULL) $user_port = explode(":", $row["userport"]);
$sql = "select gid from group where member like '%".$user_id."%' order by gid";
$row = $db - >get_one($sql);
$user_level = $row["gid"];
}
if ($login) {
session_start();
$_SESSION['pass_id'] = $user_id;
if ($user_level == 1) {
$_SESSION['pass_name'] = encodePdu("admin");
echo "";
echo "";
echo "";
}
if ($user_level == 2) {
$_SESSION['pass_name'] = encodePdu("alarm");
echo "";
echo "";
echo "";
}
if ($user_level != 1 && $user_level != 2) {
$_SESSION['pass_name'] = encodePdu($user_name);
$tmp_path = "/user_if.php;/user_event.php;/user_node.php;/user_pass.php;";
for ($n = 0; $n "; echo ""; echo ""; } } else{ if(!$login){ echo "\n "; } } ?>"

Answer 1

get_one($sql);-------这只是查出数据吧 ，是不没接收？
是$row = get_one($sql);吗