PHP MySQL 用户 ID

Question

此代码应该从我的数据库中获取用户 ID，但它返回的是:Resource id #6

那么我该如何编写代码以使其返回用户 ID？这是我目前的代码，我知道 mysql_query 已经过时了:

<?php
include("login_check.php");
include("dbconnect.php");
mysql_select_db("maxgee_close2");
$username = $_COOKIE['maxgee_me_user']; 
$user_id = mysql_query("select user_id from users where username = '$username'");
echo "$user_id";
?>

Answer 1

mysql_connect("localhost", "mysql_user", "mysql_password") or 
  die("Could not connect: " . mysql_error());
mysql_select_db("maxgee_close2");
$result = mysql_query("select user_id from users where username = '$username'");
$row = mysql_fetch_array($result);
echo $row['user_id'];    
mysql_free_result($result);