我是PHP的新手（目前正在做大学项目）。我的网站是一个管理站点，有大约3个管理员用户可以登录和更改网站等。目前，我的评论有删除功能（用户可以发布到网站的评论），但任何进入网站的人都可以看到删除功能，可以删除anybodies评论吗？
我希望它只有我的管理员在登录时才能看到删除功能，并且随后是唯一可以删除注释的人。我有一个用户名数据库，包括姓名，密码，用户名和电子邮件列。我想知道是否有人可以请看看我的代码并告诉我如何更改这一点，以便只有当管理员登录时他们才能看到按钮并删除评论。
$str_message = "";
if (!$db_server){
die("Unable to connect to MySQL: " . mysqli_connect_error());
}else{
//if ($_SESSION['admin'] == 'yes') {
if(isset($_GET['delete'])){
$deleteq="DELETE FROM comments WHERE ID={$_GET['delete']} LIMIT 1";
$deleter=mysqli_query($db_server, $deleteq);
IF($deleter){
echo"<p>That message was deleted!</p>";}}
//}
//Test whether form has been submitted
if(trim($_POST['submit']) == "Submit"){
//Handle submission
$resp = recaptcha_check_answer ($privatekey,
$_SERVER["REMOTE_ADDR"],
$_POST["recaptcha_challenge_field"],
$_POST["recaptcha_response_field"]);
if (!$resp->is_valid) {
// What happens when the CAPTCHA was entered incorrectly
$str_message = "The reCAPTCHA wasn't entered correctly. Go back and try it
again.
(reCAPTCHA said: " . $resp->error . ")";
} else {
// Your code here to handle a successful verification
$comment = $_POST['comment'];
if($comment != ""){
$query = "INSERT INTO comments (comment) VALUES ('$comment')";
mysqli_query($db_server, $query) or die("Comment insert failed: " .
mysqli_error($db_server) );
$str_message = "Thanks for your comment!";
}else{
$str_message = "Invalid form submission";
}
}
}
//Create page with or without submission
$query = "SELECT * FROM comments";
$result = mysqli_query($db_server, $query);
if (!$result) die("Database access failed: " . mysqli_error($db_server) );
{
while($row = mysqli_fetch_array($result)){
$ID= $row['ID'];
$str_result .= "<p><em>Comment $j (" . $row['commDate'] .
")</em><br /> " .$row['comment'] . "</p>
<a href ='commentnow.php?delete=$ID
'>Delete</a><hr />";
}
mysqli_free_result($result);
} }
?>
答案 0 :(得分：1)
如果我们假设你的注释声明检查用户是否是管理员（if ($_SESSION['admin'] == 'yes')），那么下面的代码应该会让你知道如何做到这一点。有两个地方需要添加if语句。我还没有能够对此进行测试，但请查看此代码中的// ADMIN IF STATEMENT，并希望您了解需要对代码进行哪些更改才能使其正常工作。
<?
$str_message = "";
if (!$db_server) {
die("Unable to connect to MySQL: " . mysqli_connect_error());
} else {
if ($_SESSION['admin'] == 'yes') { // ADMIN IF STATEMENT
if (isset($_GET['delete'])) {
$deleteq = "DELETE FROM comments WHERE ID={$_GET['delete']} LIMIT 1";
$deleter = mysqli_query($db_server, $deleteq);
if ($deleter) {
echo "<p>That message was deleted!</p>";
}
}
}
//Test whether form has been submitted
if (trim($_POST['submit']) == "Submit") {
//Handle submission
$resp = recaptcha_check_answer(
$privatekey,
$_SERVER["REMOTE_ADDR"],
$_POST["recaptcha_challenge_field"],
$_POST["recaptcha_response_field"]
);
if (!$resp->is_valid) {
// What happens when the CAPTCHA was entered incorrectly
$str_message = "The reCAPTCHA wasn't entered correctly. Go back and try it again. (reCAPTCHA said: " . $resp->error . ")";
} else {
// Your code here to handle a successful verification
$comment = $_POST['comment'];
if ($comment != "") {
$query = "INSERT INTO comments (comment) VALUES ('$comment')";
mysqli_query($db_server, $query) or die("Comment insert failed: " . mysqli_error($db_server) );
$str_message = "Thanks for your comment!";
} else {
$str_message = "Invalid form submission";
}
}
}
//Create page with or without submission
$query = "SELECT * FROM comments";
$result = mysqli_query($db_server, $query);
if (!$result) die("Database access failed: " . mysqli_error($db_server) ); {
while ($row = mysqli_fetch_array($result)) {
$ID = $row['ID'];
if ($_SESSION['admin'] == 'yes') { // ADMIN IF STATEMENT
$str_result .= "<p><em>Comment $j (" . $row['commDate'] . ")</em><br /> " .$row['comment'] . "</p><a href ='commentnow.php?delete=$ID'>Delete</a><hr />";
} else {
$str_result .= "<p><em>Comment $j (" . $row['commDate'] . ")</em><br /> " .$row['comment'] . "</p>";
}
}
mysqli_free_result($result);
}
}
?>
答案 1 :(得分：0)
if ($_SESSION['admin'] == 'yes') {
<insert code to generate a delete button here>
}
答案 2 :(得分：0)
首先，您需要更改登录页面。当用户登录时，检查他是否是管理员用户。如果是，则将会话变量（$_SESSION['admin']）设置为yes或将其设置为no。试试这样：
//login.php
if (!$db_server){
die("Unable to connect to MySQL: " . mysqli_connect_error());
}else{
session_start();
$sql="Select * FROM users WHERE user_name = 'your_username' and LIMIT 1";
$result=mysqli_query($db_server, $sql);
$objUser = $result->fetch_object();
if($objUser->user_type =="admin")
$_SESSION['admin'] = 'yes';
else
$_SESSION['admin'] = 'no';
//rest of your code for login the user
}
然后在删除页面中检查当前用户是否为admin。如果是，则执行查询else回显消息。像这样：
session_start();
$str_message = "";
if (!$db_server){
die("Unable to connect to MySQL: " . mysqli_connect_error());
}else{
if(isset($_GET['delete'])){
if ($_SESSION['admin'] == 'yes') {
$deleteq="DELETE FROM comments WHERE ID={$_GET['delete']} LIMIT 1";
$deleter=mysqli_query($db_server, $deleteq);
if($deleter){
echo"<p>That message was deleted!</p>";}
}
else
{
echo "you are not admin";
}
}
//Test whether form has been submitted
if(trim($_POST['submit']) == "Submit"){
//Handle submission
$resp = recaptcha_check_answer ($privatekey,
$_SERVER["REMOTE_ADDR"],
$_POST["recaptcha_challenge_field"],
$_POST["recaptcha_response_field"]);
if (!$resp->is_valid) {
// What happens when the CAPTCHA was entered incorrectly
$str_message = "The reCAPTCHA wasn't entered correctly. Go back and try it
again.
(reCAPTCHA said: " . $resp->error . ")";
} else {
// Your code here to handle a successful verification
$comment = $_POST['comment'];
if($comment != ""){
$query = "INSERT INTO comments (comment) VALUES ('$comment')";
mysqli_query($db_server, $query) or die("Comment insert failed: " .
mysqli_error($db_server) );
$str_message = "Thanks for your comment!";
}else{
$str_message = "Invalid form submission";
}
}
}
//Create page with or without submission
$query = "SELECT * FROM comments";
$result = mysqli_query($db_server, $query);
if (!$result) die("Database access failed: " . mysqli_error($db_server) );
{
while($row = mysqli_fetch_array($result)){
$ID= $row['ID'];
$str_result .= "<p><em>Comment $j (" . $row['commDate'] .
")</em><br /> " .$row['comment'] . "</p>
<a href ='commentnow.php?delete=$ID
'>Delete</a><hr />";
}
mysqli_free_result($result);
} }
?>
我觉得这很有意义！