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How to use PHP and CGI to implement user registration and login functions
How to use PHP and CGI to implement user registration and login functions
Jul 21, 2023 pm 02:31 PM
How to use PHP and CGI to implement user registration and login functions
User registration and login are one of the necessary functions for many websites. In this article, we will introduce how to use PHP and CGI to achieve these two functions. We'll demonstrate the entire process with a code example.
1. Implementation of the user registration function
The user registration function allows new users to create an account and save their information to the database. The following is a code example to implement the user registration function:
- Create a database table
First, we need to create a database table to store user information. You can create a table named "users" using the following SQL statement:
CREATE TABLE users (
id INT(11) AUTO_INCREMENT PRIMARY KEY,
username VARCHAR(50) NOT NULL,
password VARCHAR(255) NOT NULL,
email VARCHAR(50) NOT NULL
);
- Registration form page
Create a register.php file as the page for the user registration form. In this file, we will display a form with input boxes for username, password, and email.
<!DOCTYPE html>
<html>
<head>
<title>用戶注冊</title>
</head>
<body>
<h2>用戶注冊</h2>
<form method="post" action="register.php">
<input type="text" name="username" placeholder="用戶名" required><br>
<input type="password" name="password" placeholder="密碼" required><br>
<input type="email" name="email" placeholder="電子郵件" required><br>
<input type="submit" value="注冊">
</form>
</body>
</html>- Registration processing page
Create a register.php file to process the submission of the user registration form. In this file we will take the input values ??from the form and insert them into the database.
<?php
// 連接到數(shù)據(jù)庫
$connection = mysqli_connect("localhost", "username", "password", "database");
// 檢查連接是否成功
if (mysqli_connect_errno()) {
echo "數(shù)據(jù)庫連接失?。?quot; . mysqli_connect_error();
exit();
}
// 獲取表單中的輸入值
$username = $_POST['username'];
$password = $_POST['password'];
$email = $_POST['email'];
// 插入用戶信息到數(shù)據(jù)庫
$query = "INSERT INTO users (username, password, email) VALUES ('$username', '$password', '$email')";
mysqli_query($connection, $query);
// 關閉數(shù)據(jù)庫連接
mysqli_close($connection);
echo "注冊成功！";
?>The above are the basic steps and code examples to implement the user registration function. After the user fills in the information in the registration form and clicks the registration button, the user information will be inserted into the database.
2. Implementation of user login function
The user login function allows registered users to log in using their username and password. The following is a code example to implement the user login function:
- Login form page
Create a login.php file as the user login form page. In this file, we will display a form with input boxes for username and password.
<!DOCTYPE html>
<html>
<head>
<title>用戶登錄</title>
</head>
<body>
<h2>用戶登錄</h2>
<form method="post" action="login.php">
<input type="text" name="username" placeholder="用戶名" required><br>
<input type="password" name="password" placeholder="密碼" required><br>
<input type="submit" value="登錄">
</form>
</body>
</html>- Login processing page
Create a login.php file to process the submission of the user login form. In this file, we will take the input values ??from the form and verify that the user's username and password match by querying the database.
<?php
// 連接到數(shù)據(jù)庫
$connection = mysqli_connect("localhost", "username", "password", "database");
// 檢查連接是否成功
if (mysqli_connect_errno()) {
echo "數(shù)據(jù)庫連接失?。?quot; . mysqli_connect_error();
exit();
}
// 獲取表單中的輸入值
$username = $_POST['username'];
$password = $_POST['password'];
// 查詢數(shù)據(jù)庫驗證用戶名和密碼
$query = "SELECT * FROM users WHERE username = '$username' AND password = '$password'";
$result = mysqli_query($connection, $query);
// 檢查是否找到匹配的用戶
if (mysqli_num_rows($result) == 1) {
// 用戶驗證通過，執(zhí)行登錄操作
echo "登錄成功！";
} else {
// 用戶驗證未通過
echo "用戶名或密碼錯誤，請重試！";
}
// 關閉數(shù)據(jù)庫連接
mysqli_close($connection);
?>The above are the basic steps and code examples to implement the user login function. After the user enters the username and password in the login form and clicks the login button, the user's identity will be verified by querying the database.
Summary:
This article introduces how to use PHP and CGI to implement user registration and login functions. Through the above code examples, we can see the basic implementation steps of user registration and login functions, including creating database tables, creating registration and login form pages, and processing form submissions. I hope this article can help you understand and implement user registration and login functions!
The above is the detailed content of How to use PHP and CGI to implement user registration and login functions. For more information, please follow other related articles on the PHP Chinese website!
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