我正在尝试创建一个注册表单，将一个新用户注册到MySQL数据库。
该代码应该注册以下数据：
但是，当导航到页面顶部的register.php文件时，将显示以下错误：
Notice: Undefined index: username in /opt/lampp/htdocs/bank/server.php on line 21
Notice: Undefined index: email in /opt/lampp/htdocs/bank/server.php on line 22
Notice: Undefined index: password_1 in /opt/lampp/htdocs/bank/server.php on line 23
Notice: Undefined index: password_2 in /opt/lampp/htdocs/bank/server.php on line 24
Notice: Undefined index: firstandlast in /opt/lampp/htdocs/bank/server.php on line 25
Notice: Undefined index: bday in /opt/lampp/htdocs/bank/server.php on line 26
Notice: Undefined index: phone in /opt/lampp/htdocs/bank/server.php on line 27
Notice: Undefined index: street in /opt/lampp/htdocs/bank/server.php on line 28
这是server.php代码：
<?php
session_start();
//Initialising Variables
$username = "";
$email = "";
//Error Arrays
$errors = array();
//Connect to Data-base
$db = mysqli_connect('localhost', 'root', '', 'bank') or die ("could not connect to database");
//Register Users
$username = mysqli_real_escape_string($db, $_POST['username']);
$email = mysqli_real_escape_string($db, $_POST['email']);
$password_1 = mysqli_real_escape_string($db, $_POST['password_1']);
$password_2 = mysqli_real_escape_string($db, $_POST['password_2']);
$firstandlast = mysqli_real_escape_string($db, $_POST['firstandlast']);
$bday = mysqli_real_escape_string($db, $_POST['bday']);
$phone = mysqli_real_escape_string($db, $_POST['phone']);
$street = mysqli_real_escape_string($db, $_POST['street']);
//Form Validation: Ensure that the form is correctly filled
if(empty($username)) { array_push($errors, "Username is required"); }
if(empty($email)) { array_push($errors, "Email is required"); }
if(empty($password_1)) { array_push($errors, "Password is required"); }
if(empty($firstandlast)) { array_push($errors, "First & Last name is required"); }
if(empty($bday)) { array_push($errors, "Birth Date is required"); }
if(empty($phone)) { array_push($errors, "Phone Number is required"); }
if(empty($street)) { array_push($errors, "Street Address is required"); }
if($password_1 != $password_2){ array_push($errors, "Password do not match"); }
//Check Data-base For Exsiting User With The Same Username
$users_check_query = "SELECT * FROM users WHERE username = '$username' or email = '$email' LIMIT 1";
$results = mysqli_query($db, $users_check_query);
$users = mysqli_fetch_assoc($results);
if($users) {
if($users['username'] === $username){array_push($errors, "Username already exists");}
if($users['email'] === $email){array_push($errors, "This Email ID already has a registered username");}
}
//Register The User IF No Errors
if(count($errors) == 0 ){
$password = md5($password_1); //This will encrypt the password
$query = "INSERT INTO users (username, email, password, firstandlast, bday, phone, street)
VALUES ('$username', '$email', '$password', '$firstandlast', '$bday', '$phone', '$street')";
mysqli_query($db, $query);
$_SESSION['username'] = $username;
$_SESSION['success'] = "You are now logged in";
header('location: index.php');
}
//Log-in User
if(isset($_POST['login_user'])) {
$username = mysqli_real_escape_string($db, $_POST['username']);
$password = mysqli_real_escape_string($db, $_POST['password']);
if(empty($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' ";
$results = mysqli_query($db, $query);
if(mysqli_num_rows($results)) {
$_SESSION['username'] = $username;
$_SESSION['success'] = "Logged in successfully";
header('location: index.php');
}else{
array_push($errors, "Wrong username or password");
}
}
}
?>
这是register.php代码：
<?php include('server.php') ?>
<!DOCTYPE html>
<html lang="en">
<head>
<title>Rose Bank - Register</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.0/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"></script>
<style>
.fakeimg {
height: 200px;
background: #aaa;
}
</style>
</head>
<body>
<nav class="navbar navbar-expand-sm bg-dark navbar-dark">
<a class="navbar-brand" href="BankHome.html">Home</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#collapsibleNavbar">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="collapsibleNavbar">
<ul class="navbar-nav">
<li class="nav-item">
<a class="nav-link" href="#">About Us</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Locations</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Support</a>
</li>
</ul>
</div>
</nav>
<div class="container">
<div class="row">
<div class="col-md-4"></div>
<div class="col-md-4">
<hr/>
<h2>Please Register</h2>
<hr/>
<form action="register.php" method="post">
<?php include('errors.php') ?>
<div class="form-group">
<label for="username">Username:</label>
<input type="text" class="form-control" id="username" placeholder="Enter username" name="username" required>
</div>
<div class="form-group">
<label for="email">Email Address:</label>
<input type="email" class="form-control" id="email" placeholder="Enter email" name="email" required>
</div>
<div class="form-group">
<label for="password">Password:</label>
<input type="password" class="form-control" id="password_1" placeholder="Enter password" name="password_1" required>
</div>
<div class="form-group">
<label for="password">Confirm Password:</label>
<input type="password" class="form-control" id="password_2" placeholder="Confirm password" name="password_2" required>
</div>
<div class="form-group">
<label for="pwd">First Name & Last Name:</label>
<input type="text" class="form-control" id="firstandlast" placeholder="Enter First Name & Last Name"
name="firstandlast" required>
</div>
<div class="form-group">
<label for="pwd">Birth Date:</label>
<input type="text" class="form-control" id="bday" placeholder="Enter Birth Date"
name="bday" required>
</div>
<div class="form-group">
<label for="pwd">Phone Number:</label>
<input type="text" class="form-control" id="phone" placeholder="Enter Phone Number"
name="phone" required>
</div>
<div class="form-group">
<label for="email">Street Address:</label>
<input type="text" class="form-control" id="street" placeholder="Enter Street Address" name="street" required>
</div>
<div class="checkbox">
<label><input type="checkbox" name="remember"> Remember me</label>
</div>
<button type="submit" class="btn btn-primary btn-block" name="reg_user">Register</button>
</form>
<hr/>
<p>Already a user? <br/><a href="log-in.php"><b>Log-in</b></a></p>
</div>
<div class="col-md-4"></div>
</div>
</div>
</body>
</html>
任何帮助将不胜感激。
谢谢！