Php 如何登录和注册三个用户并在不同页面重定向，我'；我在这里失踪了？
我是新手，正在创建网页，有数据库，我有3个不同的用户要注册和登录，我不能登录和重定向到某个页面。管理员，教师，学生用户。学生不能查看教师和管理员。我在注册表格中有一个单选按钮，你们将如何登录他们并确定他们是老师、学生还是管理员 我尝试了不同的语法，但找不到一种方法来纠正我这里缺少的东西？当我尝试登录时，没有出现任何错误消息 我的注册phpPhp 如何登录和注册三个用户并在不同页面重定向，我'；我在这里失踪了？,php,mysql,Php,Mysql,我是新手，正在创建网页，有数据库，我有3个不同的用户要注册和登录，我不能登录和重定向到某个页面。管理员，教师，学生用户。学生不能查看教师和管理员。我在注册表格中有一个单选按钮，你们将如何登录他们并确定他们是老师、学生还是管理员 我尝试了不同的语法，但找不到一种方法来纠正我这里缺少的东西？当我尝试登录时，没有出现任何错误消息 我的注册php <?php include ('server.php')?> <body> <nav class="na
<?php include ('server.php')?>
<body>
<nav class="navbar navbar-expand-md bg-dark navbar-dark">
<a class="navbar-brand" href="home.php"><span><i class="fa fa-home"> My Quiz</i></span></a>
</nav>
<div class="container panel panel-default">
<h2 class="text-center">Sign Up</h2><br>
<div class="panel panel-default"><?php include('errors.php')?></div>
<form class="well form-horizontal" method="post" action="signup.php">
<fieldset>
<div class="form-group">
<label for="form" class="col-md-4 control-label">I am a: </label>
<div class="col-md-4 inputGroupContainer"><br>
<div class="form-check">
<label class="radio-inline col-md-4 control-label">
<input type="radio" id="position" name="position" value="Student" checked>Student </label>
<label class="radio-inline col-md-4 control-label">
<input type="radio" id="position" name="position" value="Teacher">Teacher </label>
</div>
</div>
</div>
<div class="form-group">
<label class="col-md-4 control-label" for="firstname">Firstname:</label>
<div class="col-md-4 inputGroupContainer">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-user"></i></span>
<input type="text" class="form-control" id="firstname" placeholder="Enter Firstname" name="firstname">
</div>
</div>
</div>
<div class="form-group">
<label class="col-md-4 control-label" for="middlename">Middlename:</label>
<div class="col-md-4 inputGroupContainer">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-user"></i></span>
<input type="text" class="form-control" id="middlename" placeholder="Enter Middlename" name="middlename">
</div>
</div>
</div>
<div class="form-group">
<label class="col-md-4 control-label" for="lastname">Lastname:</label>
<div class="col-md-4 inputGroupContainer">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-user"></i></span>
<input type="text" class="form-control" id="lastname" placeholder="Enter Lastname" name="lastname">
</div>
</div>
</div>
<div class="form-group">
<label class="col-md-4 control-label" for="email">Email:</label>
<div class="col-md-4 inputGroupContainer">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-user"></i></span>
<input type="email" class="form-control" id="email" placeholder="Enter email" name="email" value="<?php echo $email; ?>">
</div>
<small id="emailHelp" class="form-text text-muted">We'll never share your email with anyone else.</small>
</div>
</div>
<div class="form-group">
<label class="col-md-4 control-label" for="username">Username:</label>
<div class="col-md-4 inputGroupContainer">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-user"></i></span>
<input type="text" class="form-control" id="username" placeholder="Enter Username" name="username" value="<?php echo $username; ?>">
</div>
</div>
</div>
<div class="form-group">
<label class="col-md-4 control-label" for="pwd1">Password:</label>
<div class="col-md-4 inputGroupContainer">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-user"></i></span>
<input type="password" class="form-control" id="pwd1" placeholder="Enter password" name="password_1">
</div>
</div>
</div>
<div class="form-group">
<label class="col-md-4 control-label" for="pwd2">Confirm Password:</label>
<div class="col-md-4 inputGroupContainer">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-user"></i></span>
<input type="password" class="form-control" id="pwd2" placeholder="Confirm password" name="password_2">
</div>
</div>
</div>
<div class="form-group">
<label class="col-md-4 control-label"></label>
<div class="col-md-4"><br>
<h5>Already have an account? <a href="signin.php">Sign in</a></h5>
</div>
</div>
<div class="form-group">
<label class="col-md-5 control-label"></label>
<div class="col-md-4"><br>
<button type="submit" name="submitreg" class="btn btn-outline-dark"><span class="glyphicon glyphicon-send"></span> Submit</button>
</div>
</div>
</fieldset>
</form>
</div>
</body>
<?php include('server.php') ?>
<nav class="navbar navbar-expand-md bg-dark navbar-dark">
<a class="navbar-brand" href="home.php"><span><i class="fa fa-home"> My Quiz</i></span></a>
</nav>
<div class="container">
<div class="panel-body col-xs-4 col-md-offset-4">
<h2 class="text-center">Sign in</h2><br>
<form class="well form-horizontal panel panel-default" method="post" action="signin.php">
<div class="panel panel-default"><?php include('errors.php')?></div>
<div class="form-group">
<label for="username">Username:</label>
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-envelope color-blue"></i></span>
<input type="text" class="form-control padding-x-md-5" id="username" placeholder="Enter Username" name="username" >
</div>
</div>
<div class="form-group">
<label for="password">Password:</label>
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-envelope color-blue"></i></span>
<input type="password" class="form-control" id="password" placeholder="Enter password" name="password" >
</div>
</div>
<div class="text-center">
<div class="checkbox text-center">
<label><input type="checkbox" name="remember"> Remember me</label>
</div>
<h5><a name="forgot-pass" href="forgotpass.php">Forgot password</a></h5>
<h5>Don't have an account? <a href="signup.php">Sign up</a></h5>
<button type="submit" name="submitlog" class="btn btn-default">Submit</button>
</div>
</form>
</div>
</div>
<?php
session_start();
//database
$con = mysqli_connect("localhost", "root","","quizdb");
//variables
$position="";
$firstname="";
$middlename="";
$lastname="";
$email="";
$username="";
$errors=array();
$_SESSION['success'] = "";
//reg
if (isset($_POST['submitreg'])) {
register();
}
//log
if (isset($_POST['login_btn'])) {
login();
}
//out
if (isset($_GET['logout'])) {
session_destroy();
unset($_SESSION['user']);
header("location: ../login.php");
}
// REGISTER USER
function register(){
global $con, $errors;
//radio button
$position = mysqli_real_escape_string($con, $_POST['position']);
// receive all input values from the form
$firstname = mysqli_real_escape_string($con, $_POST['firstname']);
$middlename = mysqli_real_escape_string($con, $_POST['middlename']);
$lastname = mysqli_real_escape_string($con, $_POST['lastname']);
$email = mysqli_real_escape_string($con, $_POST['email']);
$username = mysqli_real_escape_string($con, $_POST['username']);
$password_1 = mysqli_real_escape_string($con, $_POST['password_1']);
$password_2 = mysqli_real_escape_string($con, $_POST['password_2']);
// form validation
// (array_push()) $errors array
if (empty($firstname)) {
array_push($errors, "firstname is required");
}
if (empty($middlename)) {
array_push($errors, "middlename is required");
}
if (empty($lastname)) {
array_push($errors, "lastname is required");
}
if (empty($email)) {
array_push($errors, "Email is required");
}
if (empty($username)) {
array_push($errors, "Username is required");
}
if (empty($password_1)) {
array_push($errors, "Password is required");
}
if ($password_1 != $password_2) {
array_push($errors, "The two passwords do not match");
}
//check the database if ue exist
$user_check_query = "SELECT * FROM users WHERE username='$username' OR email='$email' LIMIT 1";
$result = mysqli_query($con, $user_check_query);
$user = mysqli_fetch_assoc($result);
$pos = mysqli_fetch_assoc($result);
if ($user) { // if u exist
if ($user['username'] === $username) {
array_push($errors, "Username already exists");
}
if ($user['email'] === $email) {
array_push($errors, "email already exists");
}
}
// register user if there are no errors
if (count($errors) == 0) {
$password = md5($password_1);//encrypt
if (isset($_POST['Teacher'])) {
$user_type = mysqli_real_escape_string($_POST['position']);
$query = "INSERT INTO users (position, firstname, middlename, lastname, email, username, password)
VALUES('$position', '$firstname', '$middlename', '$lastname', '$email', '$username', '$password')";
mysqli_query($con, $query) or die("Error: ".mysqli_error($con));
$_SESSION['username'] = $username;
$_SESSION['success'] = "You are now logged in";
header('location: index.php');
}else{
$query = "INSERT INTO users (position, firstname, middlename, lastname, email, username, password)
VALUES('$position', '$firstname', '$middlename', '$lastname', '$email', '$username', '$password')";
mysqli_query($con, $query) or die("Error: ".mysqli_error($con));
// get id of the created user
$logged_in_user_id = mysqli_insert_id($con);
$_SESSION['position'] = getUserById($logged_in_user_id); // put logged in user in session
$_SESSION['success'] = "You are now logged in";
header('location: index.php');
}
}
}
// return user array from their id
function getUserById($id){
global $db;
$query = "SELECT * FROM users WHERE id=" . $id;
$result = mysqli_query($con, $query);
$user = mysqli_fetch_assoc($result);
return $user;
}
// ...
// LOGIN USER
function login(){
global $con, $username, $errors;
$username = mysqli_real_escape_string($con, $_POST['username']);
$password = mysqli_real_escape_string($con, $_POST['password']);
if (empty($username)) {
array_push($errors, "Username is required");
}
if (empty($password)) {
array_push($errors, "Password is required");
}
if (count($errors) == 0) {
$password = md5($password);
$query = "SELECT * FROM users WHERE username='$username' AND password='$password'";
$results = mysqli_query($con, $query);
if (mysqli_num_rows($results) == 1) {
$logged_in_user_id = mysqli_insert_id($con);
if ($logged_in_user['position'] == 'Teacher') {
$_SESSION['user'] = $logged_in_user;
$_SESSION['success'] = "You are now logged in Teacher";
header('location: makequiz.php');
}else{
$_SESSION['user'] = $logged_in_user;
$_SESSION['success'] = "You are now logged in Student";
header('location: index.php');
}
}else {
array_push($errors, "Wrong username/password combination");
}
}
}
function isLoggedIn()
{
if (isset($_SESSION['Student'])) {
return true;
}else{
return false;
}
}
function isAdmin()
{
if (isset($_SESSION['user']) && $_SESSION['Teacher']['position'] == 'Teacher' ) {
return true;
}else{
return false;
}
}
?>
注册
我是一个：
学生
老师
名字：
中间名：
姓氏：
电邮：
代码的问题在于，您没有存储查询结果，只检查了查询给出的结果数
只需在$logged\u in\u user\u id=mysqli\u insert\u id（$con）后添加以下行即可
$logged\u in\u user=mysqli\u fetch\u数组（$query）
此代码引用了$logged\u in\u user
，但我在您的代码中看不到此变量init
试试这个：
if (mysqli_num_rows($results) == 1) {
$logged_in_user = mysqli_fetch_assoc($results); //ADD THIS LINE
$logged_in_user_id = mysqli_insert_id($con);
if ($logged_in_user['position'] == 'Teacher') {
$_SESSION['user'] = $logged_in_user;
$_SESSION['success'] = "You are now logged in Teacher";
header('location: makequiz.php');
}else{
$_SESSION['user'] = $logged_in_user;
$_SESSION['success'] = "You are now logged in Student";
header('location: index.php');
}
}else {
array_push($errors, "Wrong username/password combination");
}
欢迎来到堆栈溢出。不幸的是，这个问题太宽泛了。你必须把范围缩小到你面临的某个问题。现在还不清楚你的代码的哪一部分没有按预期工作。我想补充一点，你永远不应该使用md5来存储密码。这就好像你在用纯文本存储密码。@你的常识我的问题是我不能以不同的用户类型登录。如果（mysqli_num_rows（$results）==1）{$logged_in_user_id=mysqli_insert_id（$con）；如果（$logged_in_user['position']='Teacher'）{$\u会话['user']=$logged_in_user；$_SESSION['success']=“您现在已登录教师”标题（'location:makequick.php'）；开始时，请切换到MySQLi准备的语句或使用PDO
if (mysqli_num_rows($results) == 1) {
$logged_in_user = mysqli_fetch_assoc($results); //ADD THIS LINE
$logged_in_user_id = mysqli_insert_id($con);
if ($logged_in_user['position'] == 'Teacher') {
$_SESSION['user'] = $logged_in_user;
$_SESSION['success'] = "You are now logged in Teacher";
header('location: makequiz.php');
}else{
$_SESSION['user'] = $logged_in_user;
$_SESSION['success'] = "You are now logged in Student";
header('location: index.php');
}
}else {
array_push($errors, "Wrong username/password combination");
}