我有一个PHP脚本,允许用户将条目注册到数据库。条目是自动增量的。我发现,用户#A可以通过将edit.php?id = 2更改为id = 1来获取用户#B的条目。
当然我想阻止它。所以我的想法是:如果mysql条目中的用户ID字段与我的php脚本中的$ _SESSION ['user_id']匹配,则允许编辑。
用户应该只能编辑他们自己发布的条目。
实现这一目标的最佳和最有效的方法是什么?
<?php $bruker = $_SESSION['user_id']; ?>
<?php }
/*
EDIT RECORD
*/
// if the 'id' variable is set in the URL, we know that we need to edit a record
if (isset($_GET['id']))
{
// if the form's submit button is clicked, we need to process the form
if (isset($_POST['submit']))
{
// make sure the 'id' in the URL is valid
if (is_numeric($_POST['id']))
{
// get variables from the URL/form
$id = $_POST['id'];
$elv = htmlentities($_POST['elv'], ENT_QUOTES);
$vald = htmlentities($_POST['vald'], ENT_QUOTES);
$art = htmlentities($_POST['art'], ENT_QUOTES);
$dato = htmlentities($_POST['dato'], ENT_QUOTES);
$vekt = (int)$_POST['vekt'];
$lengde = (int)$_POST['lengde'];
$flue = htmlentities($_POST['flue'], ENT_QUOTES);
$gjenutsatt = (int)$_POST['gjenutsatt'];
$kjonn = (int)$_POST['kjonn'];
$bilde = htmlentities($_POST['bilde'], ENT_QUOTES);
$user = $_SESSION['user_id'];
// check that required fields are not empty
if ($elv == '' || $vald == '' || $art == '' || $dato == '' || $vekt == '' || $kjonn == '')
{
// if they are empty, show an error message and display the form
$error = 'Du må fylle ut de påkrevde feltene!';
renderForm($elv, $vald, $art, $dato, $vekt, $lengde, $flue, $gjenutsatt, $kjonn, $bilde, $user, $error, $id);
}
else
{
// if everything is fine, update the record in the database
if ($stmt = $mysqli->prepare("UPDATE fisk SET elv = ?, vald = ?, art = ?, dato = ?, vekt = ?, lengde = ?, flue = ?, gjenutsatt = ?, kjonn= ?, bilde = ?, user = ?
WHERE id=?"))
{
$stmt->bind_param("ssssiisiisii", $elv, $vald, $art, $dato, $vekt, $lengde, $flue, $gjenutsatt, $kjonn, $bilde, $user, $id);
$stmt->execute();
$stmt->close();
}
// show an error message if the query has an error
else
{
echo "ERROR: could not prepare SQL statement.";
}
// redirect the user once the form is updated
header("Location: /");
}
}
// if the 'id' variable is not valid, show an error message
else
{
echo "Error!";
}
}
// if the form hasn't been submitted yet, get the info from the database and show the form
else
答案 0 :(得分:0)
假设您的用户拥有唯一ID,您只需在SQL中添加其他WHERE
子句:
if($ stmt = $ mysqli-&gt; prepare(“UPDATE fisk SET elv = ?, vald = ?, art = ?,dato = ?, vekt = ?, lengde = ?, flue = ?, gjenutsatt = ?, kjonn = ?,, bilde = ?, user =? WHERE id =? AND created_user =?“))
显然,将created_user
替换为用于存储创建条目的用户ID的列。
这样它只会更新用户尝试编辑它时创建的行。
更安全的是,您可以通过首先查询所讨论行的已创建用户ID然后根据您的建议检查用户ID $ _SESSION来阻止他们看到该页面 - 然后杀死脚本或重定向它们之前进入查询。