2014-11-21 112 views
1

因此,我制作了一个用户组功能,允许我阻止页面以降低用户级别。这是我抓住信息功能:

function grab_info($id, $requested_info){ 
$id = $_SESSION['user_id']; 
$requested_info = $requested_info; 
$con = new mysqli('localhost', 'root', '', 'login'); 
if ($con->connect_errno >0){ 
    die("Handle your connection error here"); 
} 
$sql = "SELECT * FROM `users` WHERE `id` = $id"; 
if (!$result = $con->query($sql)) { 
    die("There as a query error for some reason handle your query error"); 
} 
while($row = $result-fetch_assoc()){ 
    $info = $row[$requested_info]; 
    return $info; 
} 

}

就在这里:

$sql = "SELECT * FROM `users` WHERE `id` = $id"; 
if (!$result = $con->query($sql)) { 
    die("There as a query error for some reason handle your query error"); 
} 

就是事情错了。这是我抓住了信息的方法:

$id = $_SESSION['user_id']; 
$rank = grab_info($id, 'rank');//Gets rank from our id 
$meets = can_access($rank, 4, true);//We're saying our user has a rank of 1 to access this page you need a rank of 3 and only 3 hence strict 
if ($meets == false){//user cant access page 
    header("Location: index.php"); 
    die(); 
} 

基本上,它只是不断给我“作为有某种原因处理您的查询错误,查询错误”,我被卡住。新来php很抱歉,如果它是混乱。

+0

检查'$ id'不是null东西!您将一个原始变量放入查询中而不进行过滤,这意味着SQL INJECTION!在你的例子中,因为入口来自会话,所以确定但仍然考虑INJECTION – 2014-11-21 17:25:00

回答

0

检查以确保$ id实际设置。如果它为空将导致查询爆炸。

0
$sql = "SELECT * FROM `users` WHERE `id`='{$id}'"; 

试试这个:)